Circuit Protection Products PRODUCT CATALOG & DESIGN

Circuit Protection Products PRODUCT CATALOG & DESIGN
PRODUCT
CATALOG
& DESIGN
GUIDE
Circuit Protection Products
Littelfuse Circuit Prot
Solutions Port
Consumer Electronics Telecom White Goods Medical Equipment TVSS and Power
DESIGN SUPPORT
Live Application Design and Technical Support—Tap into our expertise. Littelfuse engineers are available around the world to help you address design challenges and develop
unique, customized solutions for your products.
Product Sampling Programs—Most of our products are available as samples for testing and
verification within your circuit design. Visit Littelfuse.com or contact a Littelfuse product
representative for additional information.
Product Evaluation Labs and Services—Littelfuse global labs are the hub of our new
product development initiatives, and also provide design and compliance support testing
as an added-value to our customers.
1
OVERVOLTAGE SUPPRESSION TECHNOLOGIES (1-6)
1. TVS Diodes — Suppress
overvoltage transients such
as Electrical Fast Transients
(EFT), inductive load switching
and lightning in a wide
variety of applications in the
computer, industrial, telecom
and automotive markets.
4. Gas Plasma Arrestors
(GDTs) — Available in small
footprint leaded and surface
mount configurations,
Littelfuse GDTs respond
fast to transient overvoltage
events, reducing the risk of
equipment damage.
2. Varistors — Multiple forms,
from Metal Oxide Varistors
(MOVs) that suppress transient
voltages to Multi-Layer Varistors
(MLVs) designed for applications
requiring protection from
various transients in computers
and handheld devices as well
as industrial and automotive
applications.
5. SPA™ Silicon Protection
Arrays — Designed specifically
to protect analog and digital
signal lines from electrostatic
discharge (ESD) and other
overvoltage transients.
3. SIDACtor® Devices—
Complete line of protection
thyristor products specifically
designed to suppress
overvoltage transients in a
broad range of telecom and
datacom applications.
2
6. PulseGuard® ESD
Suppressors — Available in
various surface mount form
factors to protect high-speed
digital lines without causing
signal distortion.
Visit
tection
folio
Supplies Lighting General Electronics
3
5
SWITCHING
TECHNOLOGIES
ACCESSORIES
Switching Thyristors—
Solid-state switches used to
control the flow of electrical
current in applications, capable
of withstanding rated blocking/
off-state voltage until triggered
to on-state.
In addition to our broad portfolio
of circuit protection technologies,
we offer an array of fuse holders
including circuit board, panel
or in-line wire mounted devices
to support a wide range of
application requirements.
7
OVERCURRENT
PROTECTION
TECHNOLOGIES (7-8)
7. Positive Temperature
Coefficient Devices (PTCs)—
Provide resettable overcurrent
protection for a wide range of
applications.
4
6
www.littelfuse.com for more information.
8
8. Fuses — Full range including
surface mount, axial, glass or
ceramic, thin-film or Nano2®
style, fast-acting or SloBlo®,
MINI ® and ATO ® fuses.
Overvoltage Protection with Littelfuse Varistors
Littelfuse offers Varistor protective devices with peak current ratings from
20A-70,000A, peak energy ratings from 0.01J-10,000J, and mounting options to serve
a wide range of applications.
The Littelfuse MLV (Multilayer Varistor) family consists of compact surface mount
devices with enhanced performance and filtering characteristics for circuit boardlevel applications. They protect against electrostatic discharge, EFT and surge, offer
low capacitance for high data rates and high capacitance for EMI filtering, and are
widely used in computers, handheld devices, and automotive electronics.
The Littelfuse MOV (Metal Oxide Varistor) family suppresses higher energy voltage
transients such as that generated by electrical load switching and lightning. Offered
in mouting options including bare disk, terminal connection and radial and axial
leaded packages, they are often used in power supply, appliance and industrial
applications.
Features
tMany form factor and protection ranges available
tHigh surge capability – up to 70,000A
tRugged cost effective protection
t Thermal protection options available
tRoHS compliant
Varistor Products
6
Introduction to Overvoltage Suppression
7-9
Introduction to Varistor Technology
10-17
How to Connect a Littelfuse Varistor
18-19
Varistor Terms and Definitions
20-21
Agency Standards
22-23
Surface Mount Varistors (MOVs and MLVs)
RoHS
MHS Series Multilayer High-Speed Surface Mount ESD Voltage Suppressor
25
RoHS
MLE Series Multilayer Surface Mount ESD Suppressor/Filter
31
RoHS
ML Series Multilayer Surface Mount Transient Voltage Surge Suppressor
37
RoHS
MLN SurgeArray™ Four Line Multilayer Transient Voltage Suppressor
45
RoHS
AUML Series Multilayer Surface Mount Automotive Transient Surge Suppressor
51
RoHS
CH Series Monolithic Chip Transient Voltage Suppressor
59
RoHS
NEW! SM7 Series Surface Mount Varistor for Line Voltage Operation (see also LA and ZA series)
65
Radial Lead Varistors (Radial MOVs)
RoHS
TMOV® and iTMOV® Radial Lead Thermally Protected Metal Oxide Varistors
69
RoHS
TMOV25S® Thermally Protected Metal Oxide Varistor
79
RoHS
UltraMOV™ Radial Lead Metal Oxide Varistors
87
RoHS
UltraMOV™ 25S Series High Surge Current Radial Lead Metal Oxide Varistors
RoHS
C-III Series High Energy Radial Lead Varistors
RoHS
LA Series Radial Lead Metal Oxide Varistors for Line Voltage Operation
115
RoHS
ZA Series Radial Lead Metal Oxide Varistors for Low to Medium Voltage Operation
129
99
105
Industrial High Energy Varistors (High Energy MOVs)
RoHS
BA/BB Series Industrial High Energy Metal Oxide Varistors
143
RoHS
DA/DB Series Industrial High Energy Metal Oxide Varistors
149
RoHS
HA Series Industrial High Energy Metal Oxide Varistors
153
®
RoHS
TMOV34S High Energy, Thermally Protected Metal Oxide Varistors
159
RoHS
HB34, HF34 and HG34 Series Industrial High Energy Metal Oxide Varistors
167
RoHS
DHB34 Series Industrial High Energy Metal Oxide Varistors
175
RoHS
CA Series Industrial High Energy Metal Oxide Disc Varistors
181
Other Application Specific Varistors
MA Series Axial Lead Metal-Oxide Varistors
187
RA Series Low Profile Lead
193
High Reliability Series
©2009 Littelfuse, Inc.
201
1
Revision: November 5, 2009
Surface Mount Items
Varistor Application Guide
Standard Radial Items
4-5
Hi Energy Items
Product Selection Worksheet and Guide
Specialty Items
Varistor Products Overview
Overview
TABLE OF CONTENTS
Varistor Products
2
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
where, although lower in energy, transients from ESD,
inductive load switching, and even lightning surge
remnants would otherwise reach sensitive integrated
circuits. Each of these events can relate to a product’s
ElectroMagnetic Compatibility (EMC), or its immunity to
transients that could cause damage or malfunction.
To assure reliable operation, transient voltage suppression
should be considered at early stages of the design process.
This can be a complex task as electronic components are
increasingly sensitive to stray electrical transients. The
designer must define the types of transient threats and
determine what applications are needed while meeting the
product agency norms and standards.
Littelfuse offers five distinct versions of MLVs including
the MHS Series ESD Suppressor for high data rates, the
ML Series which supports the broadest application range,
the MLE Series intended for ESD while providing filter
functions, the MLN Series Quad Array in a 1206 & 0805
chip and the AUML Series characterized for the specific
transients found in automotive electronic systems.
Varistors are increasingly used as the front-line solution for
transient surge protection. Littelfuse provides expertise
to the designer and offers the broadest range of circuit
protection technologies to choose from.
Littelfuse varistors are available in a variety of forms to
serve a wide range of applications. Options include ultra
small surface mount multi-layer suppressor (MLV) devices
for small electronics applications, and traditional midrange metal-oxide (MOV) radial and axial leaded devices
for protection of small machinery, power sources and
components. Littelfuse also offers larger terminal mount
MOVs for industrial applications.
This catalog and design guide includes selection tables,
technology tutorials, and detailed product technical
information, to aid you in choosing the correct Littelfuse
Varistor to serve your application.
Please visit www.littelfuse.com regularly to find the most
current Littelfuse varistor product information.
A more recent innovation to the the Littelfuse product
line, MLVs address a specific part of the transient
voltage spectrum – the circuit board level environment
Additional design support information can be found at
http://www.littelfuse.com/design-support.html
Maximum Steady-State Applied Voltage
Peak
Current
(A)
Energy
(J)
Volts AC RMS
4 10 25
115 150
130
Volts DC
3.5 14 35
200
175
264
320
250 275
460
660 750
1,000
2,800
6,000
365
330 369
850 970
1,200
3,500
7,000
615
Disc Sizes / Packages
®
TMOV and
iTMOV®
6,500–10,000
50–273
20,000–40,000
170–1050
30–1,000
0.1–25
MLVs and CH Series
50–6,500
0.1–52
ZA Series
100–6,500
0.4–160
1,200–22,000
11–890
25,000–40,000
160–1,050
HA, HB, HC, HF, HG, DA/DB, DHB Series
50,000–70,000
450–10,000
BA/BB Series
50,000–70,000
880–10,000
40–100
0.06–1.7
100–6500
0.4–190
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
14, 20 (mm)
Industrial TMOV25S® and TMOV34S®
25, 34 (mm)
0402, 0603, 1206,
1210, 1812,
2220, 5x8 mm
5, 7, 10,
14, 20 (mm)
5x8, 10x16,
14x22 (mm)
RA Series
C-III, LA, UltraMOV™ Series
CA Series
MA Series
7, 10, 14,
20, 25 (mm)
32, 34,
40 (mm)
60 mm
60 (mm)
3 (mm)
Hi–Reliability Series
3
Revision: November 5, 2009
ZA series,
DA/DB Series
OVERVIEW
Overview
Introduction
Varistor Products
Product Selection Worksheet
Step 1. Determine the circuit’s operating parameters.
Step 3. Guidelines for Selecting a Varistor
(complete as much of the following information as possible).
If a response to one of the requirements below is "False," refer
to appropriate corrective action notes (A-F) at bottom of list:
1-a. Source and path of the transient
________ Source
3-a. Varistor voltage value - Tolerance of varistor ≥ Required
______True ______False (A)
varistor voltage value (2-a)
________ Path
1-b. Normal operating voltage of protected device
3-b. Varistor maximum clamping voltage value Maximum
allowable voltage of protected equipment or device (1-d)
________ (VAC) , or ________ (V)RMS DC
(Max. current should be less than or equal to the current at which
maximum clamping voltage is measured).
______True______False (B)
1-c. Tolerance of normal operating voltage (1-b)
________ (V)
or ________ Unknown
1-d. Max. allowable voltage of protected device
3-c. Varistor maximum peak current value Maximum expected
surge current (1-e)
______True ______False (C)
________ (VAC) or ________ (V)RMS DC
Note: If surge current waveform is not 8 x 20μs, use Pulse
Lifetime Ratings curves.
1-e. Maximum expected surge current and number of hits
(Specify 8x20μs waveform equivalent of surge current)
________ (A)
3-d. Varistor maximum energy rating Maximum energy
______True ______False (D)
applied to system (1-f)
________ (# of hits)
1-f. Maximum energy applied to device in surge event
3-e. Varistor maximum rated power Maximum power applied
to system (1-g)
______True ______False (E)
________ (Joules) (E=1.4xVxIxT)
3-f. Varistor capacitance Maximum allowable system
capacitance (1-h)
______True ______False (F)
1-g. Maximum power applied to device in surge event
________ (W) (P=VxI)
Corrective action notes:
A. Select next varistor on the list (i.e. next varistor with
increasing varistor voltage value) and then re-verify 3-a.
B. Select previous varistor on the list (i.e. previous varistor with
decreasing varistor voltage value) and then re-verify 3-b.
C. Select next varistor diameter level and then re-verify 3-c.*
D. Select next varistor diameter level and then re-verify 3-d.*
E. Select next varistor diameter level and then re-verify 3-e.*
F. Select lower varistor diameter level and then re-verify 3-c,
3-d, 3-e and 3-f.*
* If varistor voltage is below 82V, selecting an 82V ROV may
be preferable over a higher diameter part.
1-h. Maximum allowable varistor capacitance (@1kHz; 0VDC
bias) (This is the maximum capacitance of the varistor device that
will not impair the functionality of the circuit)
________ (pF)
1-i. Required safety standards
(Name of standards required, such as UL, CSA, VDE, etc.)
Step 2. Calculate voltage value.
2-a. The required varistor voltage value should be equal to:
the operating voltage of the protected equipment or device*
+
Step 4. Verify the following system conditions.
the tolerance of the operating voltage.
4-a. Leakage current of the selected varistor is appropriate for
the circuit ______True ______False
If the tolerance is not known, multiply the operating voltage of
protected equipment or device by 1.10 to 1.25 (i.e. 10–25% above
operating voltage value).
4-b. Verify the performance of the varistor under fault
conditions ______Verified
If the operating voltage is in AC (VRMS) convert to VDC.
____ Operating voltage AC (V) x 1.414 = ______________________
Operating voltage (V)RMS DC
Users should Independently evaluate the suitability of, and test
each MOV device in their application for safety and suitability
with the end application.
________Operating voltage of equipment or device (VDC)
+
_________Tolerance (V) = _____________________
Required varistor voltage (V)
- or ____Operating voltage of equipment or device (VDC )
x
(1.10 to 1.25) = _____________ Required varistor voltage (V)
4
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Varistor Products
Surface Mount MLVs
Type
Series
MHS
MLE
ML
MLN
25
31
37
45
Radial Leaded MOVs
AUML
TMOV® and
iTMOV®25S
iTMOV®
CH
UltraMOV™
UltraMOV™
25S
C-III
LA
ZA
87
99
105
115
129
Image
PAGE NUMBER
Technology Type
Operating AC
Voltage Range
Operating DC
Voltage Range
Peak Current
Range (A)**
Peak Energy
Range (J)
Ceramic
69
2.7 - 107
18
–––––
14-275
30 - 135
18
5.5 - 120
5.5 - 18
18
300
79
Zinc
Oxide
18
115-750
115-750
130-625
115-750
130-660
130-1000
4-460
18-369
–––––
–––––
170-825
150-970
–––––
175-1200
5.5-615
20000
1750-10000
22000
35009000
1200-6500
50-6500
170 - 670
12.5-720
230-890
40-530
11-360
0.1-52
4 - 500
30
20
250-500
600010000
0.02 - 2.5
0.05 - 0.10
–––––
1-23
35-480
22 - 28
-55 to +125°C
Lines Protected
1
Surface Mount
Disc Size (MOV)
(Not Applicable)
–––––
-55 to +85°C
4
Mount/Form Factor
RoHS
59
Zinc
Oxide
9 - 42
Temperature
Range (Deg.ºC)
Agency Approvals
51
Multilayer
Zinc Oxide
–––––
–––––
1
1
Radial Leaded
–––––
–––––
14, 20
25 mm
7, 10, 14, 20
25 mm
10, 14, 20 7, 10, 14, 20 5, 7, 10, 14, 20
mm round
square
mm round
square
mm round mm round
mm round
UL,CSA,
UL,CSA,
UL,CSA,
UL,CSA,
UL,CSA,
UL Pending
UL, VDE
VDE, CECC
VDE, CECC VDE, CECC
VDE
VDE, CECC
UL
Compliant
Refer to Datasheets
Lead–free
Refer to Datasheets
* Not an applicable parameter for this technology
** Not an applicable parameter for Crowbar devices
Industrial High Energy MOVs
Type
Series
Special MOVs
BA/BB
DA/DB
HA
TMOV34S®
HB34,
HG34 HF34
DHB34
CA
MA
RA
High
Reliability
143
149
153
159
167
175
181
187
193
201
Image
PAGE NUMBER
Technology Type
Operating AC
Voltage Range
Operating DC
Voltage Range
Peak Current
Range (A)**
Peak Energy
Range (J)
Zinc Oxide
130-2800
130-750
130-750
115-750
130-750
250-2800
250-2800
9-264
4-275
130-510
175-3500
–––––
175-970
330-3,500
330-3,500
13-365
5.5-369
4-675
20000
70000
40-100
100-6500
100-6500
330-10000
0.06-1.7
0.4-160
0.4-190
Bare Disc
Axial Leaded
Inline Radial
Leads
(Varies)
175-970
175-970
50000
70000
40000
25000
40000
40000
40000
20000
70000
450-10000
270-1050
200-1050
235-1050
270-1050
330-10000
Temperature
Range (Deg.C)
-55 to +85°C
Lines Protected
1
Mount/Form Factor
Screw / Clip Terminals
Disc Size (MOV) 60 mm round 40 mm round
Agency Approvals
RoHS
Industrial Packaged Radial Leads
32, 40 mm
round
34 mm square
60 mm round
Not Applicable
UL
UL
UL & CSA
UL
UL & CSA
–––––
–––––
–––––
Compliant
No
No
No
Yes
No
Yes
Yes
Yes
Yes
No
Lead–free
No
No
No
Yes
No
No
No
Yes
Yes
No
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
5
Revision: November 5, 2009
UL, CSA
(Varies)
MIL, QPL,
CECC, CSA
OVERVIEW
Overview
Product Selection Guide
Varistor Products
Varistor Application Guides
MARKET
SEGMENT
Low Voltage, Board Level Products
AC Line, TVSS Products
Automotive Electronics
Telecommunictions Products
Industrial High Energy AC Products
TYPICAL APPLICATIONS AND CIRCUIT EXAMPLES
•
•
•
•
Hand-Held/Portable Devices
EDP
Computer
I/O Port and Interfaces
•
•
•
•
•
•
•
•
•
UPS
AC Panels
AC Power Taps
TVSS Devices
AC Appliance/Controls
•
•
•
•
•
•
•
•
•
ABS
EEC
Instrument Center
Air Bag
Window Control/ Wiper
Modules
•
•
•
• Cellular/Cordless Phone
• Modems
• Secondary Phone Line
Protectors
• Data Line Connectors
•
•
•
•
•
•
•
•
•
•
High Current Relays
Solenoids
Motor Drives
AC Distrbution Panels
Controllers
Instrumentation
Remote Sensors
Medical Electronics, Etc.
Power Meters
Power Supplies
Circuit Breakers
Consumer Electronics
Body Controllers
Multiplex Bus
EFI
Repeaters
Line Cards
COE
T1/E1/ISDN
Robotics
Large Motors/Pumps/
Compressors
DEVICE FAMILY OR SERIES
TECHNOLOGY
SURFACE MOUNT
PRODUCTs
CH
MOV
√
MA, ZA, RA
MOV
ML, MLE, MLN, MHS
MLV
TMOV®, UltraMOV™, C-111,
LA, HA, HB, HG, HF, DHB,
TMOV34S®, RA
MOV
CH
MOV
√
CH
MOV
√
ZA
MOV
AUML, ML, MLE, MLN, MHS
MLV
√
CH
MOV
√
ZA
MOV
ML, MLE, MLN, MHS
MLV
DA/DB, BA/BB, CA, HA, HB,
HC, HG, HF, DHB, TMOV34S®
MOV
√
√
Available in both surfacemount and through-hole packages.
6
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Varistor Products
Introduction to Overvoltage Suppression
100
90
%
Current (I) %
Voltage transients are defined as short duration surges of
electrical energy and are the result of the sudden release
of energy that was previously stored, or induced by other
means, such as heavy inductive loads or lightning strikes.
In electrical or electronic circuits, this energy can be
released in a predictable manner via controlled switching
actions, or randomly induced into a circuit from external
sources.
60n
Figure 2. ESD Test Waveform
Why are Transients of Increasing Concern?
Component miniaturization has resulted in increased
sensitivity to electrical stresses. Microprocessors for
example, have structures and conductive paths which
are unable to handle high currents from ESD transients.
Such components operate at very low voltages, so
voltage disturbances must be controlled to prevent device
interruption and latent or catastrophic failures. Sensitive
devices such as microprocessors are being adopted at
an exponential rate. Microprocessors are beginning to
perform transparent operations never before imagined.
Everything from home appliances, such as dishwashers, to
industrial controls and even toys, have increased the use of
microprocessors to improve functionality and efficiency.
Vp/2
Vehicles now employ many electronics systems to
control the engine, climate, braking and, in some cases,
steering systems. Some of the innovations are designed
to improve efficiency, but many are safety related, such as
ABS and traction control systems. Many of the features in
appliances and automobiles use modules which present
transient threats (such as electric motors). Not only is
the general environment hostile, but the equipment or
appliance can also be sources of threats. For this reason,
careful circuit design and the correct use of overvoltage
protection technology will greatly improve the reliability
and safety of the end application. Table 2 shows the
vulnerability of various component technologies.
t
t2
Figure 1. Lightning Transient Waveform
VOLTAGE
CURRENT
25kV
20kA
10μs
1ms
Switching
600V
500A
50μs
500ms
RISE-TIME DURATION
EMP
1kV
10A
20ns
1ms
ESD
15kV
30A
<1ns
100ns
I60
tr = 0.7 to 1.0ns
Vp
Lighting
I30
30n
Repeatable transients are frequently caused by the
operation of motors, generators, or the switching of
reactive circuit components. Random transients, on the
other hand, are often caused by Lightning (Figure 1) and
Electrostatic Discharge (ESD) (Figure 2). Lightning and ESD
generally occur unpredictably, and may require elaborate
monitoring to be accurately measured, especially if induced
at the circuit board level. Numerous electronics standards
groups have analyzed transient voltage occurrences
using accepted monitoring or testing methods. The key
characteristics of several transients are shown below in
Table 1.
t1
OVERVIEW
Overview
Transient Threats – What Are Transients?
Table 1. Examples of transient sources and magnitude
Characteristics of Transient Voltage Spikes
Transient voltage spikes generally exhibit a "double
exponential" wave form, shown in Figure 1 for lightning and
figure 2 for ESD. The exponential rise time of lightning is in
the range 1.2μs to 10μs (essentially 10% to 90%) and the
duration is in the range of 50μs to 1000μs (50% of peak
values). ESD on the other hand, is a much shorter duration
event. The rise time has been characterized at less than 1
ns. The overall duration is approximately 100ns.
Device Type
Vulnerability (volts)
VMOS
30-1800
MOSFET
100-200
GaAsFET
100-300
EPROM
100
JFET
140-7000
CMOS
250-3000
Schottky Diodes
300-2500
Bipolar Transistors
380-7000
SCR
680-1000
Table 2: Range of device vulnerability.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
7
Revision: November 5, 2009
Varistor Products
Transient Voltage Scenarios
T
V
T1
ESD (Electrostatic Discharge)
90%
Electrostatic discharge is characterized by very fast rise
times and very high peak voltages and currents. This
energy is the result of an imbalance of positive and
negative charges between objects.
VS
10%
Below are some examples of the voltages which can be
generated, depending on the relative humidity (RH):
•
Walking across a carpet:
35kV @ RH = 20%; 1.5kV @ RH = 65%
•
Walking across a vinyl floor:
12kV @ RH = 20%; 250V @ RH = 65%
•
Worker at a bench:
6kV @ RH = 20%; 100V @ RH = 65%
•
Vinyl envelopes:
7kV @ RH = 20%; 600V @ RH = 65%
•
Poly bag picked up from desk:
20kV @ RH = 20%; 1.2kV @ RH = 65%
VB
VB = 25V to 125V
T1 = 5ms to 10ms
VB = 14V
R = 0.5Ω to 4Ω
T = 40ms to 400ms
t
Figure 3. Automotive Load Dump
Figure 3, shows a transient which is the result of stored
energy within the alternator of an automobile charging
system. A similar transient can also be caused by other
DC motors in a vehicle. For example, DC motors power
amenities such as power locks, seats and windows.
These various applications of a DC motor can produce
transients that are just as harmful to the sensitive
electronic components as transients created in the external
environment.
Referring to Table 2 on the previous page, it can be
seen that ESD that is generated by everyday activities
can far surpass the vulnerability threshold of standard
semiconductor technologies. Figure 2 shows the
ESD waveform as defined in the IEC 61000-4-2 test
specification.
Lightning Induced Transients
Even though a direct strike is clearly destructive, transients
induced by lightning are not the result of a direct strike.
When a lightning strike occurs, the event creates a
magnetic field which can induce transients of large
magnitude in nearby electrical cables.
Inductive Load Switching
The switching of inductive loads generates high energy
transients which increase in magnitude with increasingly
heavy loads. When the inductive load is switched off, the
collapsing magnetic field is converted into electrical energy
which takes the form of a double exponential transient.
Depending on the source, these transients can be as large
as hundreds of volts and hundreds of Amps, with duration
times of 400ms.
Figure 4, shows how a cloud-to-cloud strike will effect
not only ove RHead cables, but also buried cables. Even a
strike 1 mile distant (1.6km) can generate 70V in electrical
cables.
Typical sources of inductive transients are:
•
Generator
•
Motor
•
Relay
•
Transformer
Buried Line
Transient Generated:
• 70 V at 1.6km (1 mile)
• 10 kV at 150m (160 yards)
These examples are extremely common in electrical and
electronic systems. Because the sizes of the loads vary
according to the application, the wave shape, duration,
peak current and peak voltage are all variables which
exist in real world transients. Once these variables can be
approximated, a suitable suppressor technology can be
selected.
Figure 4. Cloud-to-Cloud Lightning Strike
8
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Varistor Products
Figure 5, on the following page, shows the effect of a
cloud-to-ground strike: the transient–generating effect is far
greater.
Because of the various types of transients and applications,
it is important to correctly match the suppression solution
to the different applications. Littelfuse offers the broadest
range of circuit protection technologies to ensure that you
get the proper solution for your application. Please consult
our online library of Application Notes and Design Notes for
further information on common design issues encountered
at http://www.littelfuse.com.
11kV
100m
1km
1100 V
110 V
10km
Metal Oxide Varistors and Multi-Layered Varistors
Varistors are voltage dependent, nonlinear devices which
have electrical characteristics similar to back-to- back Zener
diodes. They are composed primarily of ZNO with small
additions of other metal oxides such as Bismuth, Cobalt,
Magnese and others. The Metal Oxide Varistor or "MOV" is
sintered during the manufacturing operation into a ceramic
semiconductor and results in a crystalline microstructure
that allows MOVs to dissipate very high levels of transient
energy across the entire bulk of the device. Therefore,
MOVs are typically used for the suppression of lightning
and other high energy transients found in industrial or
AC line applications. Additionally, MOVs are used in DC
circuits such as low voltage power supplies and automobile
applications. Their manufacturing process permits many
different form factors with the radial leaded disc being the
most common.
Figure 5. Cloud-to-Ground Lightning Strike
PERCENT OF PEAK VALUE
Figure 6, shows a typical current waveform for induced l
ightning disturbances.
100
90
50
Multilayer Varistors or MLVs are constructed of ZNO
material similar to standard MOVs, however, they are
fabricated with interweaved layers of metal electrodes and
supplied in leadless ceramic packages. As with standard
MOVs, Multilayers transition from a high impedance to a
conduction state when subjected to voltages that exceed
their nominal voltage rating. MLVs are constructed in
various chip form sizes and are capable of significant surge
energy for their physical size. Thus, data line and power
supply suppression are achieved with one technology.
10
O1
T
TIME
T1
Figure 6. Peak Pulse Current Test Waveform
The following parameters apply to Varistors and/or
Multilayer Varistors and should be understood by the
circuit designer to properly select a device for a given
application.
The three Littelfuse technologies described offer a
comprehensive choice for the designer. Reviewing the
attributes of each can result in a suitable ESD suppression
solution for most applications. See the individual data
sheets for specific electrical and mechanical information.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
9
Revision: November 5, 2009
OVERVIEW
Overview
Technological Solutions for Transient Threats
Varistor Products
Introduction to Varistor Technology
The varistor body structure consists of a matrix of conductive ZNO grains separated by grain boundaries providing P–N junction semiconductor characteristics. These
boundaries are responsible for blocking conduction at low
voltages and are the source of the nonlinear electrical
conduction at higher voltages.
Physical Properties
MOVs are designed to protect sensitive circuits against
external transients (lightning) and internal transients
(inductive load switching, relay switching and capacitor discharges). And other high level transients found in
industrial, AC line application or lower level transients found
in automotive DC line applications with peak current rating
ranging from 20A to 500A and peak energy rating from
0.05J – 2.5J.
PER VERT
DIV 1mA
An attractive property of the MOV is that the electrical characteristics are related to the bulk of the device. Each ZnO
grain of the ceramic acts as if it has a semiconductor junction at the grain boundary. A cross-section of the material
is shown in Figure 2, which illustrates the ceramic microstructure. Varistors are fabricated by forming and sintering
Zinc Oxide-based powders into ceramic parts. These parts
are then electroded with either thick film Silver or arc/flame
sprayed metal.
PER HORIZ
DIV 50V
I
PER STEP
gm PER DIV
The ZnO grain boundaries can be clearly observed. Since
the nonlinear electrical behavior occurs at the boundary
of each semiconducting ZnO grain, the varistor can be
considered a "multi-junction" device composed of many
series and parallel connections of grain boundaries. Device
behavior may be analyzed with respect to the details of
the ceramic microstructure. Mean grain size and grain size
distribution play a major role in electrical behavior.
V
FIGURE 1. TYPICAL VARISTOR V-I CHARACTERISTIC
The symmetrical, sharp breakdown characteristics shown
in Figure 1, enable the varistor to provide excellent transient suppression performance. When exposed to high
voltage transients the varistor impedance changes many
orders of magnitude from a near open circuit to a highly
conductive level, thus clamping the transient voltage to a
safe level. The potentially destructive energy of the incoming transient pulse is absorbed by the varistor, thereby
protecting vulnerable circuit components.
Since electrical conduction occurs, in effect, between
ZNO grains distributed throughout the bulk of the device,
the Littelfuse Varistor is inherently more rugged than its
single P–N junction counterparts, such as Zener diodes.
In the varistor, energy is absorbed uniformly throughout
the body of the device with the resultant heating spread
evenly through its volume. Electrical properties are controlled mainly by the physical dimensions of the varistor
body which is sintered in various form factors such as
discs, chips and tubes. The energy rating is determined by
volume, voltage rating by thickness or current flow path
length, and current capability by area measured normal to
the direction of current flow.
100μ
FIGURE 2. OPTICAL PHOTOMICROGRAPH OF A POLISHED
AND ETCHED SECTION OF A VARISTOR
10
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
The varistor voltage, (VN), is defined as the voltage across a
varistor at the point on its V-I characteristic where the
transition (v) is complete from the low-level linear region
to the highly nonlinear region. For standard measurement
purposes, it is arbitrarily defined as the voltage at a current
of 1mA. Some typical values of dimensions for Littelfuse
Varistors are given in Table 1.
Varistor Microstructure
The bulk of the varistor between contacts is comprised of
ZnO grains of an average size "d" as shown in the schematic model of Figure 3. Resistivity of the ZnO is <0.3 Ω–cm.
CURRENT
ELECTRODES
TABLE 1.
INTERGRANULAR
BOUNDARY
d
AVERAGE
GRAIN SIZE
DEVICE
GRADIENT THICKNESS
VOLTS
MICRONS
n
V/mm AT
1mA
mm
150VRMS
20
75
150
1.5
25VRMS
80 (Note)
12
39
1.0
NOTE: Low voltage formulation.
FIGURE 3. SCHEMATIC DEPICTION OF THE
MICROSTRUCTURE OF A METAL-OXIDE
VARISTOR, GRAINS OF CONDUCTING
ZnO (AVERAGE SIZE d) ARE SEPARATED
BY INTERGRANULAR BOUNDARIES.
Theory of Operation
Because of the polycrystalline nature of metal-oxide semiconductor varistors, the physical operation of the device is
more complex than that of conventional semiconductors.
Intensive measurement has determined many of the device’s electrical characteristics, and much effort continues
to better define the varistor’s operation. However from the
user’s viewpoint, this is not nearly as important as understanding the basic electrical properties as they relate to
device construction.
Designing a varistor for a given nominal varistor voltage,
(VN ), is basically a matter of selecting the device thickness
such that the appropriate number of grains, (n), are in series between electrodes. In practice, the varistor material is
characterized by a voltage gradient measured across its
thickness by a specific volts/mm value. By controlling
composition and manufacturing conditions the gradient
remains fixed. Because there are practical limits to the
range of thicknesses achievable, more than one voltage
gradient value is desired. By altering the composition of
the metal oxide additives it is possible to change the grain
size "d" and achieve the desired result.
The key to explaining metal-oxide varistor operation lies in
understanding the electronic phenomena occurring near
the grain boundaries, or junctions between the ZNO grains.
While some of the early theory supposed that electronic
tunneling occurred through an insulating second phase
layer at the grain boundaries, varistor operation is probably better described by a series-parallel arrangement of
semiconducting diodes. In this model, the grain boundaries
contain defect states which trap free electrons from the
n-type semiconducting ZNO grains, thus forming a space
charge depletion layer in the ZnO grains in the region adjacent to the grain boundaries. (See reference notes on the
last page of this section).
A fundamental property of the ZnO varistor is that the
voltage drop across a single interface "junction" between
grains is nearly constant. Observations over a range of
compositional variations and processing conditions show a
fixed voltage drop of about 2V-3V per grain boundary
junction. Also, the voltage drop does not vary for grains of
different sizes. It follows, then, that the varistor voltage
will be determined by the thickness of the material and the
size of the ZnO grains. The relationship can be stated very
simply as follows:
Evidence for depletion layers in the varistor is shown in Figure 4, where the inverse of the capacitance per boundary
squared is plotted against the applied voltage per boundary.
This is the same type of behavior observed carrier concentration, N, was determined to be about 2 x 1017 per cm3. In
addition, the width of the depletion layer was calculated to
be about 1000 Angstrom units. Single junction studies also
support the diode model.
between electrodes
and, varistor thickness, D = (n + 1)d
V ×d
N
≈ ---------------3
where,
VARISTOR
VOLTAGE
d = average grain size
V
R X = ---I
It is these depletion layers that block the free flow of
carriers and are responsible for the low voltage insulating
behavior in the leakage region as depicted in Figure 5. The
leakage current is due to the free flow of carriers across
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
11
Revision: November 5, 2009
OVERVIEW
Overview
Varistor Products
Varistor Products
the field lowered barrier, and is thermally activated, at least
above about 25ºC. For semiconductor abrupt P-N junction
diodes. The relationship is:
0 B
E
2 ( Vb + V )
1
------- = -------------------------2
qsN
C
V
L L
C
E
R
VR
f
X
L
Where:
(Vb) = barrier voltage,
(V) = applied voltage,
(q) = electron charge,
(es) = semiconductor permittivity and
(N) = carrier concentration.
From this relationship the ZnO carrier concentration, N,
was determined to be about 2 x 1017 per cm3.
E
X
R
F
I
EV
In addition, the width of the depletion layer was calculated
to be about 1000 Angstrom units. Single junction studies
also support the diode model.
0
FIGURE 5. ENERGY BAND DIAGRAM OF A
ZnO-GRAINBOUNDARY-ZnO JUNCTION
(1014)
Transport mechanisms in the nonlinear region are very
complicated and are still the subject of active research.
Most theories draw their inspiration from semiconductor
transport theory and is not covered in detail in this document.
4
1
------------2 2
4
c n /cm
L ⁄ o
3
NORMALIZED THERMAL BARRIER
0.4
0.8
0.8
o = 0.59
2
0
1.0
1.2
VA PER BOUNDARY
FIGURE 4. CAPACITANCE-VOLTAGE BEHAVIOR OF
VARISTOR RESEMBLES A SEMICONDUCTOR
ABRUPT-JUNCTION REVERSED BIASED DIODE
Nd ~ 2 x 1017/cm3
Figure 5, shows an energy band diagram for a ZnO-grain
boundary-ZnO junction . The left-hand grain is forward
biased, VL, and the right side is reverse biased to VR. The
depletion layer widths are XL and XR, and the respective
barrier heights are fL and fR. The zero biased barrier height
is fO. As the voltage bias is increased, fL is decreased and
fR is increased, leading to a lowering of the barrier and an
increase in conduction.
0.6
0.4
0.2
0
0
4
8
12
16
VOLTAGE (V)
FIGURE 6. THERMAL BARRIER vs APPLIED VOLTAGE
The barrier height fL of a low voltage varistor was
measured as a function of applied voltage, and is
presented in Figure 6. The rapid decrease in the barrier at
high voltage represents the onset of nonlinear conduction.
12
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Many encapsulation techniques are used in the assembly
of the various Littelfuse Varistor packages. Most radials
and some industrial devices (HA Series) are epoxy coated
in a fluidized bed, whereas epoxy is “spun” onto the axial
device.
Varistor Construction
The process of fabricating a Littelfuse Varistor is illustrated
in the flow chart of Figure 7. The starting material may
differ in the composition of the additive oxides, in order to
cover the voltage range of product.
ZnO
Radials are also available with phenolic coatings applied
using a wet process. The PA Series package consists of
plastic molded around a 20mm disc subassembly. The RA,
DA and DB Series devices are all similar in that they all are
composed of discs or chips, with tabs or leads, encased
in a molded plastic shell filled with epoxy. Different package styles allow variation in energy ratings, as well as in
mechanical mounting.
ADDITIVE OXIDES
(MAINLY BL203)
MIXING
POWDER PREPARATION
POWDER
PRESS
TABLE 2. BY–TYPE CERAMIC DIMENSIONS
SINTER
FORM CERAMIC BODY
PACKAGE
TYPE
ELECTRODE
MECHANICAL
ASSEMBLY
Leadless Surface
Mount
PACKAGE AS/IF REQUIRED
Axial Leaded
ENCAPSULATE
Radial Leaded
FINAL PRODUCT TO
ELECTRICAL TEST
FIGURE 7. SCHEMATIC FLOW DIAGRAM OF LITTELFUSE
VARISTOR FABRICATION
Device characteristics are determined at the pressing
operation. The powder is pressed into a form of predetermined thickness in order to obtain a desired value of nominal voltage. To obtain the desired ratings of peak current
and energy capability, the electrode area and mass of the
device are varied. The range of diameters obtainable in disc
product offerings is listed here:
Nominal Disc
Diameter–mm
3
5
7
10
14
20
32
34
40
CH, AUML†, ML†, 5mm x 8mm Chip, 0603,
MLE†, MLN†
0805, 1206, 1210, 1812,
Series
2220
MA Series
3mm Diameter Disc
ZA, LA, C–III,
5mm, 7mm, 10mm,
TMOV®, i TMOV®
14mm, 20mm Diameter
,UltraMOV™,
Discs
TMOV25S® Series
Boxed, Low
Profile
RA Series
5mm x 8mm, 10mm x
16mm, 14 x 22 Chips
Industrial
Packages
BA, BB Series
DA, DB Series
DHB Series
HA, HB Series
HC, HF Series
HG Series
32mm, 40mm Diameter
Disc, 34mm Square
Disc, 40mm Diameter
Disc, 60mm Diameter
Disc
Industrial Discs
CA Series
60mm Diameter Discs
62
FIGURE 9B. CROSS-SECTION
OF RADIAL LEAD PACKAGE
FIGURE 9A. CROSS-SECTION
OF MA SERIES
Electroding is accomplished, for radial and chip devices, by
means of thick film silver fired onto the ceramic surface.
Wire leads or strap terminals are then soldered in place. A
conductive epoxy is used for connecting leads to the axial
3mm discs. For the larger industrial devices (40mm and
60mm diameter discs) the contact material is arc sprayed
Aluminum, with an overspray of Copper if necessary to
give a solderable surface.
©2009 Littelfuse, Inc.
CERAMIC DIMENSIONS
Figure 9A, 9B and 9C (next page) show construction details
of some Littelfuse varistor packages. Dimensions of the
ceramic, by package type, are above in Table 2.
Of course, other shapes, such as rectangles, are also
possible by simply changing the press dies. Other ceramic
fabrication techniques can be used to make different
shapes. For example, rods or tubes are made by extruding
and cutting to length. After forming, the green (i.e., unfired)
parts are placed in a kiln and sintered at peak temperatures
in excess of 1200ºC. The B ismuth oxide is molten above
825ºC, assisting in the initial densification of the polycrystalline ceramic. At higher temperatures, grain growth occurs, forming a structure with controlled grain size.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
SERIES
13
Revision: November 5, 2009
OVERVIEW
Overview
Varistor Products
Varistor Products
Electrical Characterization Varistor V-I Characteristics
FIGURE 9C. PICTORIAL VIEW OF HIGH ENERGY
DA, DB AND BA/BB SERIES
Turning now to the high current upturn region in Figure 10,
we see that the V-I behavior approaches an ohmic characteristic. The limiting resistance value depends upon the
electrical conductivity of the body of the semiconducting
ZnO grains, which have carrier concentrations in the range
of 1017 to 1018 per cm3. This would put the ZnO resistivity
below 0.3Ωcm.
DA SERIES
LEAKAGE
REGION
UPTURN
REGION
NORMAL VARISTOR
OPERATION
1000
500
1
50
I = kV R=1
-
100
R = 10 9
Ω
VOLTAGE (V)
200
10Ω
SLOPE = ---
DB SERIES
(TYPICAL V130LA20A)
20
10
10-8
10-6
10-4
10-2
100
102
104
CURRENT (A)
FIGURE 10. TYPICAL VARISTOR V-I CURVE PLOTTED ON
LOG-LOG SCALE
Varistor electrical characteristics are conveniently displayed
using log-log format in order to show the wide range of
the V-I curve. The log format also is clearer than a linear
representation which tends to exaggerate the nonlinearity
in proportion to the current scale chosen. A typical V-I
characteristic curve is shown in Figure 10. This plot shows
a wider range of current than is normally provided on varistor data sheets in order to illustrate three distinct regions
of electrical operation.
BA/BB SERIES
Equivalent Circuit Model
An electrical model for the varistor can be represented by
the simplified equivalent circuit of Figure 11.
L (LEAD
INDUCTANCE)
(TYPICAL V130LA20A)
C
(0.002μF)
V
Rx
(0 TO ∞)
R OFF
(1000MΩ)
R ON
(1Ω)
FIGURE 11. VARISTOR EQUIVALENT CIRCUIT MODEL
14
Revision: November 5, 2009
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Varistor Products
The relation between the leakage current (I) and temperature (T) is
At low current levels, the V-I Curve approaches a linear
(ohmic) relationship and shows a significant temperature
dependence. The varistor is in a high resistance mode
(approaching 109Ω) and appears as an open circuit. The
nonlinear resistance component (RX) can be ignored because (ROFF) in parallel will predominate. Also, (RON) will be
insignificant compared to (ROFF).
where:
VB = 0.9eV
The temperature variation, in effect, corresponds to a
change in (ROFF). However, (ROFF) remains at a high resistance value even at elevated temperatures. For example, it
is still in the range of 10MΩ to 100MΩ at 125ºC.
Although (ROFF) is a high resistance it varies with frequency.
The relationship is approximately linear with inverse frequency.
R OFF
FIGURE 12. EQUIVALENT CIRCUIT AT LOW CURRENTS
If however, the parallel combination of (ROFF) and (ºC) is predominantly capacitive at any frequency of interest. This is
because the capacitive reactance also varies approximately
linearly with 1/f.
For a given varistor device, capacitance remains approximately constant over a wide range of voltage and frequency in the leakage region. The value of capacitance drops
only slightly as voltage is applied to the varistor. As the
voltage approaches the nominal varistor voltage, the capacitance decreases. Capacitance remains nearly constant
with frequency change up to 100 kHz. Similarly, the change
with temperature is small, the 25ºC value of capacitance
being well with +/-10% from -40ºC to +125ºC.
At higher currents, at and above the mA range, temperature variation becomes minimal. The plot of the temperature coefficient (dV/dT) is given in Figure 14. It should be
noted that the temperature coefficient is negative (-) and
decreases as current rises. In the clamping voltage range
of the varistor (I > 1A), the temperature dependency approaches zero.
The temperature effect of the V-I characteristic curve in the
leakage region is shown in Figure 13. A distinct temperature dependence is noted.
TEMPERATURE COEFFICIENT (%/ oC)
VARISTOR VOLTAGE IN PERCENT OF
VNOM VALUE AT 25oC (%)
NORMAL
OPERATION
LEAKAGE REGION
100
80
60
50
40
30
20
SPECIMEN V130LA10A
0.1
0
SAMPLE TYPE
V130LA10A
-0.1
V22ZA3
-0.2
-0.3
-0.4
-0.5
10-5
25 50 75 100 125oC
10
10-9
IO = constant
k = Boltzmann’s Constant
L
C
-VB/kT
I = IO OVERVIEW
Overview
Leakage Region of Operation
10-4
10-3
10-2
10-1
100
101
102
103
CURRENT (A)
10-8
10-7
10-6
10-5
10-4
VARISTOR CURRENT (A DC )
10-3
10 -2
NOTE: Typical Temperature Coefficient of Voltage vs Current, 14mm
Size, 55oC to 125oC.
FIGURE 13. TEMPERATURE DEPENDENCE OF THE CHARACTERISTIC CURVE IN THE LEAKAGE REGION
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
FIGURE 14. RELATION OF TEMPERATURE COEFFICIENT
DV/DT TO VARISTOR CURRENT
15
Revision: November 5, 2009
Varistor Products
5
DYNAMIC RESISTANCE
The varistor characteristic follows the equation:
I = kVa, where (k) is a constant and the exponent (a)
defines the degree of nonlinearity. Alpha is a figure of merit
and can be determined from the slope of the V-I curve or
calculated from the formula:
log( I 2 ⁄ I 1 )
= ------------------------------log( V 2 ⁄ V 1 )
1
= ------------------------------- for I2 ⁄ I 1 = 1
log( V 2 ⁄ V 1 )
(Ω PER RATED RMS INPUT VOLT)
Nominal Varistor Region of Operation
1
0.5
0.01
0.05
0.01
0.005
0.001
0.01
In this region the varistor is conducting and RX will predominate over C, RON and ROFF. RX becomes many orders of
magnitude less than ROFF but remains larger than RON.
0.1
1.0
10
100
PEAK CURRENT (A)
FIGURE 16B. Z X DYNAMIC VARISTOR RESISTANCE
Upturn Region of Operation
L
At high currents, approaching the maximum rating, the
varistor approximates a short-circuit. The curve departs
from the nonlinear relation and approaches the value of the
material bulk resistance, about 1Ω-10Ω. The upturn takes
place as RX approaches the value of RON. Resistor RON
represents the bulk resistance of the ZNO grains. This resistance is linear (which appears as a steeper slope on the log
plot) and occurs at currents 50A to 50,000A, depending on
the varistor size.
RX
FIGURE 15. EQUIVALENT CIRCUIT AT VARISTOR CONDUCTION
During conduction the varistor voltage remains relatively
constant for a change in current of several orders of magnitude. In effect, the device resistance, RX, is changing in
response to current. This can be observed by examining
the static or dynamic resistance as a function of current.
The static resistance is defined by:
L
V
R X = ---I
R ON
and the dynamic resistance by:
dv
Z X = ------ = V ⁄ I = R X ⁄ di
FIGURE 17. EQUIVALENT CIRCUIT AT VARISTOR UPTURN
Plots of typical resistance values vs current (I) are given in
Figure 16A and 16B.
STATIC RESISTANCE
(Ω PER RATED RMS INPUT VOLT)
500
100
50
10
5
1
0.5
0.1
0.05
0.01
0.01
0.1
1
10
100
PEAK CURRENT (A)
FIGURE 16A. R X STATIC VARISTOR RESISTANCE FIGURE
16
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©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
The V-I characteristic of Figure 19A, shows how the response of the varistor is affected by the current waveform.
From such data, an "overshoot" effect can be defined as
being the relative increase in the maximum voltage appearing across the varistor during a fast current rise, using the
conventional 8/20μs current wave as the reference. Figure
19B, shows typical clamping voltage variation with rise
time for various current levels.
Speed of Response and Rate Effects
The varistor action depends on a conduction mechanism
similar to that of other semiconductor devices. For this
reason, conduction occurs very rapidly, with no apparent
time lag – even into the nanosecond (ns) range. Figure 18,
shows a composite photograph of two voltage traces with
and without a varistor inserted in a very low inductance
impulse generator. The second trace (which is not synchronized with the first, but merely superimposed on the oscilloscope screen) shows that the voltage clamping effect of
the varistor occurs in less than 1.0 ns.
FIGURE 19. RESPONSE OF LEAD-MOUNTED VARISTORS
TO CURRENT WAVEFORM
1000
100V/DIV.
400
200
10
20
40
60
100
200
400
600
1000
2000
PEAK CURRENT (A)
FIGURE 19A. V-I CHARACTERISTICS FOR VARIOUS CURRENT
RISE TIMES
500ps/DIV.
FIGURE 18. RESPONSE OF A ZnO VARISTOR TO A FAST
RISE TIME (500ps) PULSE
% OF CLAMPING VOLTAGE AT 8 μs
140
In the conventional lead–mounted devices, the inductance
of the leads would completely mask the fast action of the
varistor; therefore, the test circuit for Figure 18, required
insertion of a small piece of varistor material in a coaxial
line to demonstrate the intrinsic varistor response.
Tests made on lead– mounted devices, even with careful
attention to minimizing lead length, show that the voltages
induced in the loop formed by the leads contribute a substantial part of the voltage appearing across the terminals
of a varistor at high current and fast current rise. Fortunately, the currents which can be delivered by a transient
source are invariably slower in rise time than the observed
voltage transients. The applications most frequently
encountered for varistors involve current rise times longer
than 0.5μs.
2
130
1000A/cm
(2.5kA)
DEVICE: V130LA20A
(LEAD AREA <1cm 2 ) (NOTE)
2
120
100A/cm
(250A)
110
10A/cm
(25A)
2
100
90
100%
AT
8μs
0.2
0.4
0.6 0.8 1
2
4
6
PULSE RISE TIME ( μs)
FIGURE 19B. OVERSHOOT DEFINED WITH REFERENCE TO
THE BASIC 8/20μs CURRENT PULSE
Voltage rate-of-rise is not the best term to use when discussing the response of a varistor to a fast impulse (unlike
spark gaps where a finite time is involved in switching from
nonconducting to conducting state). The response time of
the varistor to the transient current that a circuit can deliver
is the appropriate characteristic to consider.
©2009 Littelfuse, Inc.
1/3 μs
8/ 20 μs
600
TRACE 2
LOAD
VOLTAGE
CLAMPED BY
VARISTOR
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
WAVESHAPE
0.5/1.5 μs
DEVICE: V130LA20A
800 (LEAD AREA <1cm 2) (NOTE)
CLAMPING VOLTAGE (V)
TRACE 1
LOAD
VOLTAGE
WITHOUT
VARISTOR
17
Revision: November 5, 2009
8 10
OVERVIEW
Overview
Varistor Products
Varistor Products
How to Connect a Littelfuse Varistor
Transient suppressors can be exposed to high currents for
short durations in the nanoseconds to millisecond time
frame.
Single Phase
LINE
Littelfuse Varistors are connected in parallel to the load, and
any voltage drop in the leads to the varistor will reduce its
effectiveness. Best results are obtained by using short
leads that are close together to reduce induced voltages
and a low ohmic resistance to reduce I • R drops.
1
NEUTRAL
3
2
GND
FIGURE 23.
This is the most complete protection one can select, but in
many cases only Varistor 1 or Varistor 1 and 2 are selected.
LINE
SINGLE PHASE
2 WIRE 110V
110V
GND
LINE
SINGLE PHASE
2 WIRE 240V
240V
GND
LINE
SINGLE PHASE
3 WIRE 120V/240V
GND OR
NEUTRAL
120V
240V
120V
LINE
FIGURE 24.
18
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Three Phase
DC Application
DC applications require connection between plus and minus or plus and ground and minus and ground.
1
380V
220V
220V
220V
4
3
SUPPRESSOR
CONNECTION
1-4
2-4
3-4
For example, if a transient towards ground exists on all
3 phases (common mode transients) only transient
suppressors connected phase to ground would absorb
energy. Transient suppressors connected phase to phase
would not be effective.
2
FIGURE 25A. 3 PHASE 220V/380V,
UNGROUNDED
(380V)
220V
SUPPRESSOR
CONNECTION
1-2
2-3
3-1
1
220V
3
2
220V
COMMON
MODE
TRANSIENT
FIGURE 25B. 3 PHASE 220V OR 380V,
UNGROUNDED
SUPPRESSOR
CONNECTION
1-2
2-3
1-3
1
220V
220V
3
2
220V
FIGURE 26A. INCORRECT
FIGURE 26B. CORRECT
FIGURE 26. COMMON MODE TRANSIENT
AND CORRECT SOLUTION
FIGURE 25C. 3 PHASE 220V, ONE PHASE
GROUNDED
LOWER VOLTAGE
1
220V
220V
4
3
2
110V 110V
On the other hand if a differential mode of transient (phase
to phase) exists then transient suppressors connected
phase to phase would be the correct solution.
SUPPRESSOR
CONNECTION
1-3
1-2
2-4
3-4
DIFFERENTIAL
MODE
TRANSIENT
FIGURE 25D. 3 PHASE 220V
1
2
0V
11
11
0V
208V
208V
208V
110V
3
SUPPRESSOR
CONNECTION
1-2
1-3
3-2
1 - GND
2 - GND
3 - GND
FIGURE 27A. INCORRECT
FIGURE 27. DIFFERENTIAL MODE TRANSIENT
AND CORRECT SOLUTION
If only 3 suppressor use 1-GND, 2-GND, 3-GND
FIGURE 25E. 3 PHASE 120V/208V, 4-WIRE
1
2
415V
240V
240V
415V
3
240V
415V
This is just a selection of some of the more important variations in connecting transient suppressors.
SUPPRESSOR
CONNECTION
1-2
1-3
3-2
1 - GND
2 - GND
3 - GND
The logical approach is to connect the transient suppressor
between the points of the potential difference created by
the transient.The suppressor will then equalize or reduce
these potentials to lower and harmless levels.
If only 3 suppressor use 1-GND, 2-GND, 3-GND
FIGURE 25F. 3 PHASE 240V/415V
For higher voltages use same connections, but
select varistors for the appropriate voltage rating.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
FIGURE 27B. CORRECT
19
Revision: November 5, 2009
OVERVIEW
Overview
Varistor Products
Varistor Products
Varistor Terms and Definitions
Definitions (IEEE Standard C62.33, 1982)
Test Waveform
A characteristic is an inherent and measurable property of a
device. Such a property may be electrical, mechanical, or thermal, and can be expressed as a value for stated conditions.
At high current and energy levels, varistor characteristics
are measured, of necessity, with an impulse waveform.
Shown in Figure 21, is the ANSI Standard C62.1 waveshape, an exponentially decaying waveform representative
of lightning surges and the discharge of stored energy in
reactive circuits.
A rating is a value which establishes either a limiting capability or a limiting condition (either maximum or minimum)
for operation of a device. It is determined for specified
values of environment and operation. The ratings indicate a
level of stress which may be applied to the device without
causing degradation or failure. Varistor symbols are defined
on the linear V-I graph illustrated in Figure 20.
The 8/20μs current wave (8μs rise and 20μs to 50% decay of
peak value) is used as a standard, based on industry practices, for the characteristics and ratings described. One exception is the energy rating (WTM), where a longer waveform of
10/1000μs is used. This condition is more representative of
the high energy surges usually experienced from inductive
discharge of motors and transformers. Varistors are rated for
a maximum pulse energy surge that results in a varistor voltage (VN) shift of less than +/-10% from initial value.
CURRENT (A)
IP
IX
100
90
IN(DC)
IPM
ID
50
VPM
VM(DC)
VN(DC) VX VC
VOLTAGE (V)
VIRTUAL START OF WAVE
10
VARISTOR
SYMBOL
1000
IMPULSE DURATION
VIRTUAL FRONT DURATION
= 1.25 x RISETIME FROM 10% TO 90%
PEAK CURRENT (A)
VN(DC)
FIGURE 21. DEFINITION OF PULSE CURRENT WAVEFORM
10
Power Dissipation Ratings
10
-6
IN(DC)
When transients occur in rapid succession the average
power dissipation is the energy WTM(watt-seconds) per
pulse times the number of pulses per second. The power
so developed must be within the specifications shown
in the Device Ratings and Characteristics Table for the
specific device. Certain parameters must be derated at
high temperatures.
10º
CURRENT (A)
FIGURE 20 – I-V GRAPH ILLUSTRATING
SYMBOLS AND DEFINITIONS
Voltage Clamping Device
100
PERCENT OF RATED VALUE
A clamping device, such as an MOV, refers to a characteristic
in which the effective resistance changes from a high to low
state as a function of applied voltage. In its conductive state,
a voltage divider action is established between the clamping
device and the source impedance of the circuit. Clamping
devices are generally “dissipative” devices, converting much
of the transient electrical energy to heat.
Choosing the most appropriate suppressor depends upon
a balance between the application, its operation, voltage
transient threats expected and sensitivity levels of the
components requiring protection. Form factor/package
style also must be considered.
90
80
70
60
ML, MLE, MHS, MLN
CH,RA SERIES
50
40
BA/BB, CA, DA/DB,
LA, "C"III, HA, MA,
UltraMOV, ZA SERIES
30
20
10
0
-55
70 80 90 100 110 120 130 140 150
AMBIENT TEMPERATURE (ºC)
FIGURE 22. DEVICE RATINGS AND CHARACTERISTICS
20
Revision: November 5, 2009
50
60
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Varistor Products
Terms and Descriptions
Symbol
Clamping Voltage. Peak voltage across the varistor measured under conditions of a specified peak VC pulse current
and specified waveform. NOTE: Peak voltage and peak currents are not necessarily coincidental in time.
VC
Rated Peak Single Pulse Transient Currents (Varistor). Maximum peak current which may be applied for a single
8/20μs impulse, with rated line voltage also applied, without causing device failure.
ITM
Lifetime Rated Pulse Currents (Varistor). Derated values of ITM for impulse durations exceeding that of an 8/20μs
waveshape, and for multiple pulses which may be applied over device rated lifetime.
-
Rated RMS Voltage (Varistor). Maximum continuous sinusoidal RMS voltage which may be applied.
VM(AC)
Rated DC Voltage (Varistor). Maximum continuous DC voltage which may be applied.
VM(DC)
DC Standby Current (Varistor). Varistor current measured at rated voltage, VM(DC).
ID
For certain applications, some of the following terms may be useful.
Nominal Varistor Voltage. Voltage across the varistor measured at a specified pulsed DC current, IN(DC), of
specific duration. IN(DC) of specific duration. IN(DC) is specified by the varistor manufacturer.
VN(DC)
Peak Nominal Varistor Voltage. Voltage across the varistor measured at a specified peak AC current, IN(AC), of
specific duration. IN(AC) is specified by the varistor manufacturer.
VN(AC)
Rated Recurrent Peak Voltage (Varistor). Maximum recurrent peak voltage which may be applied for a
specified duty cycle and waveform.
VPM
Rated Single Pulse Transient Energy (Varistor). Energy which may be dissipated for a single impulse of maximum
rated current at a specified waveshape, with rated RMS voltage or rated DC voltage also applied, without causing
device failure.
WTM
Rated Transient Average Power Dissipation (Varistor). Maximum average power which may be dissipated due to a
group of pulses occurring within a specified isolated time period, without causing device failure.
Varistor Voltage. Voltage across the varistor measured at a given current, IX.
Voltage Clamping Ratio (Varistor). A figure of merit measure of the varistor clamping effectiveness as defined by
the symbols (VC) ÷ (VM(AC)), (VC) ÷ (VM(DC)).
VX
VC /VPM
Nonlinear Exponent. A measure of varistor nonlinearity between two given operating currents, I1 and I2, as
described by I = kVa where k is a device constant, I1 ≤ I ≤ I2, and a12 = ( logI2 / I1 ) ÷ ( logV2 / V1 )
a
Dynamic Impedance (Varistor). A measure of small signal impedance at a given operating point as defined by:
ZX = ( dVX ) ÷ ( dIX )
ZX
Resistance (Varistor). Static resistance of the varistor at a given operating point as defined by:
RX = ( VX) ÷ ( IX )
RX
Capacitance (Varistor). Capacitance between the two terminals of the varistor measured at C specified
frequency and bias.
C
AC Standby Power (Varistor). Varistor AC power dissipation measured at rated RMS voltage VM(AC).
PD
Voltage Overshoot (Varistor). The excess voltage above the clamping voltage of the device for a given current that
occurs when current waves of less than 8μs virtual front duration are applied. This value may be expressed as a % of
the clamping voltage (VC) for an 8/20 current wave.
VOS
Response Time (Varistor). The time between the point at which the wave exceeds the clamping voltage level (VC)
and the peak of the voltage overshoot. For the purpose of this definition, clamping voltage as defined with an 8/20μs
current waveform of the same peak current amplitude as the waveform used for this response time.
-
Overshoot Duration (Varistor). The time between the point voltage level (VC) and the point at which the voltage
overshoot has decayed to 50% of its peak. For the purpose of this definition, clamping voltage is defined with an
8/20μs current waveform of the same peak current amplitude as the waveform used for this overshoot duration.
-
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
21
Revision: November 5, 2009
OVERVIEW
Overview
TABLE 3. VARISTOR CHARACTERISTICS (IEEE STANDARD C62.33-1982 SUBSECTION 2.3 AND 2.4)
Varistor Products
Agency Standards
Littelfuse Varistors have been investigated and evaluated
and are certified, recognized or otherwise approved with
pertinent safety or standards organizations. Following are
descriptions of some of the applicable standards.
Electrostatic Discharge (ESD) Standards
Several industry standards and specifications exist that
are used to qualify and quantify ESD events. Since many
circuits or systems must demonstrate immunity to ESD,
these standards are often incorporated in the testing of
ESD capability. Of particular concern is the immunity level
for semiconductors. The "standards" include Human Body
Model (HBM) to MIL-STD-883, Machine Model (MM) such
as EIAJ IC121, and Charged Device Model (CDM) such
as US ESD DS 5.3. The Human Body Model, Machine
Model and Charged Device Model primarily relate to
manufacturing and testing process of an IC.
Underwriters Laboratories (UL)
UL writes "Standards" to which products are investigated.
Upon completion of the tests, a "Listing" or "Recognition" to
the standard with conditions of acceptability is given under
a unique file number. All of Littelfuse applicable Varistors
are in the "Recognized Components" category to one or
more of the following standards:
•
UL1449 Transient Voltage Suppressors.
•
UL1414 Across the Line Capacitors, Antenna
Coupling and Line By-Pass Capacitors for
Radio and Television Type Appliances.
•
UL497B Protectors for Data and
Communication and Fire Alarm Circuits.
One of the most severe is IEC 61000-4-2 from the
International Electrotechnical Commission (IEC) and
referenced in the EMC directive. Level 4 of this test
method is the highest level, subjecting the device under
test to 8kV contact discharge method (preferred) and/or
15kV air discharge. Each Littelfuse technology is designed
for this level. The recommended types are the Silicon
based Silicon Protection Array SP05x and SP7X, the
polymeric VVM based PulseGuard® Suppressor, and the
ML, MLE, MHS or MLN Multilayers.
(Note that the terms "Approved" or "Certified" are not
correct in referring to devices listed or recognized by UL.)
VDE (Verband Deutscher Electrotechniker)
The designer should be aware of the ESD ratings of
the semiconductors used in the circuit. For example,
semiconductor manufacturers that rate their devices to
MIL-STD-883 to 2kV may not pass 2kV when subjected to
the more difficult IEC test method (150pF / 330Ω instead
of 100pF / 1500Ω). Additionally, even if semiconductors
do meet some level of ESD immunity to IEC standards,
that does not imply that additional ESD suppression is not
required. Real world ESD transients can exceed the peak
currents and voltages as defined by the standards and can
have much faster rise times.
Based in Germany, this is the Association of German
Engineers who develop specific safety standards and test
requirements. VDE tests and certifies devices or products,
assigning a license number. Littelfuse Radial Varistors are
currently certified under license number 104846–E having
successfully met CECC standard 42 201-006 (issue 1/1996).
CECC (CENELEC Electronic Components Committee)
Based in Brussels, CENELEC is the “European Committee
for Electrotechnical Standardization” which provides
harmonized standards for the European Community based
upon IEC and ISO publications. All Littelfuse Radial Varistor
Series are approved to Specification 42201-006.
IEC 61000-4-2 consists of four test severity levels of
ESD immunity using both a Contact Discharge and Air
Discharge test method. The EUT or DUT may be subjected
to increasing levels of severity until failure. Or, a particular
level of immunity may be prescribed for EM compatibility
of an end product.
CSA (Canadian Standards Association)
For more information about the IEC 61000-4-2 test method,
see Application Note AN9734, “IEC Electromagnetic
Compatibility Standards for Industrial Process
Measurement and Control Equipment.”
Based in Canada, this regulatory agency writes standards
to which it conducts product safety tests. Upon successful
completion, a file number is established, the product is
“Certified” and may display the CSA logo as indication.
Specific Littelfuse Varistors have been tested to CSA
Standard number 22.2, No.1-94. Littelfuse file number is
LR91788.
NSAI (National Standards Authority of Ireland)
This Irish testing organization is facilitated and authorized
to evaluate products to the various Euro Norms CECC
specifications thereby granting declarations of conformity.
22
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
Varistor Products
AGENCY AND SPECIFICATION NUMBER
SERIES
UL
PRODUCT CLASS
UL1449
Industrial/MOV
X
DA/DB
Industrial/MOV
X
HA, HC
Industrial/Hi Energy/
MOV
X
Note 1
LA
Radial/MOV
X
X
BB
Industrial/MOV
DA/DB
Industrial/MOV
X
HA
Industrial/MOV
X
BA
HB, HF, HG, DHB,
UL
UL1414
UL497B
CSA
22.2-1
VDE
NSAI
CECC Spec CECC Spec
42201-006 42201-006
X
X
X
X
Note 1
Note 1
X
Industrial/MOV
X
TMOV® 34mm
X
CH
Surface Mount/MOV
Note 1
X
ZA
Radial Leaded
Note 1
X
RA
Special Radial
X
Note 1
Radial/MOV
X
X
Note 1
X
X
X
X
X
X
Pending
Pending
CA60 Disk
®
TMOV 25mm
MIL, QPL
Note 1
Industrial/Hi Energy/
MOV
TMOV® 14mm
and 20mm
DSSC
Note 1
Note 1
X
X
Industrial Hi Energy
Radial/MOV
Pending
UltraMOVŒ
Radial Leaded
X
25S UltraMOVŒ
Radial Leaded
Pending
Pending
C–III
Radial Leaded
X
X
MA
Special Axial
HI REL, QPL Parts
Special Radial
X
NOTES:
1) Applies to certain models only, see specific product Data Sheet for details.
• Not all types within each series are applicable for recognition.
• Not all Littelfuse Varistors products require safety listing due to their low operating
voltage and intended applications. These includes ML, MLN, MLE, MHS leadless
chips.
• The information provided is accurate at the time of printing. Changes can occur
based upon new products offered by Littelfuse, revision of an existing standard, or
introduction of a new standard or agency requirement. Contact Littelfuse Sales for
latest information.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com for current information.
23
Revision: November 5, 2009
OVERVIEW
Overview
UL
Varistor Products
24
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MHS Series
RoHS
MHS Varistor Series
Description
The Multilayer High–Speed MHS Series is a very-low
capacitance extension to the Littelfuse ML family of
transient voltage surge suppression devices available in an
0402 and 0603–size surface mount chip.
Their small size is ideal for high–density printed circuit
boards, being typically applied to protect intergrated
circuits and other sensitive components. They are
particularly well suited to suppress ESD events including
those specified in IEC 61000-4-2 or other standards used
for Electromagnetic Compliance (EMC) testing.
Size Table
Metric
EIA
1005
0402
1608
0603
The MHS Series is manufactured from semiconducting
ceramics and is supplied in a leadless, surface mount
package. The MHS Series is also compatible with modern
reflow and wave soldering prcesses.
Littelfuse Inc. manufactures other multilayer varistor series
products, see the ML, MLE, MLN and AUML Series data
sheets.
Applications
Features
•
Data, Diagnostic
I/O Ports
•
Mobile
Communications
•
AEC - Q200 compliant
•
RoHS compliant
•
Universal Serial
Bus (USB)
•
Computer/DSP
Products
•
•
Video & Audio Ports
•
•
Portable/HandHeld Products
Industrial Instruments
Including Medical
3pF, 12pF, and 22pF
capacitance versions
suitable for high–speed
data rate lines
•
•
EFT/B rated to IEC
61000-4-4 (Level 4)
•
Low leakage currents
•
-55ºC to +125ºC
operating temp. range
•
Inherently bi-directional
ESD rated to IEC
61000-4-2 (Level 4)
Absolute Maximum Ratings
• For ratings of individual members of a series, see device ratings and specifications table.
Continuous
MHS Series
Units
≤ 42
V
Steady State Applied Voltage:
DC Voltage Range (VM(DC)) :
V0402/0603MHS03
V0402/0603MHS12
≤ 18
V
V0402/0603MHS22
≤ 09
V
Operating Ambient Temperature Range (TA)
Storage Temperature Range (TSTG)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MHS.html for current information.
25
Revision: November 5, 2009
-55 to +125
O
C
-55 to +150
O
C
MHS Varistor Series
MHS Series
The MHS Series provides protection from ESD and EFT in
high–speed data line and other high frequency applications.
The low capacitance of the MHS Series permits usage
in analog or digital circuits where it will not attenuate or
distort the desired signal or data.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MHS Series
Device Ratings and Specifications
Performance Specifications (25 ºC)
Part
Number
Typical Leakage
Current at Specified
DC Voltage
Maximum ESD Clamp
Voltage (Note 1)
Maximum
Clamping
Voltage At
1A (8X20μs)
8kV Contact (Note 2)
Clamp
Typical
Capacitance at
1MHz (1V p-p)
Typical
Inductance
(from Impedance
Analysis)
L
15kV AIR (Note 3)
Clamp
3.5V
P
5.5V
IL
C (Note 4)
MIN
MAX
(Vc)
(V)
(V)
(μA)
(μA)
(pF)
(pF)
(nH)
V0402MHS03N
135
<300
<400
0.5
1.00
1
6 (Note 5)
<1.0
V0603MHS03N
135
<300
<400
0.5
1.00
1
6
<1.0
V0402MHS12N
55
<125
<160
0.5
1.00
8
16
<1.0
V0603MHS12N
55
<125
<160
0.5
1.00
8
16
<1.0
V0402MHS22N
30
<125
<160
0.5
1.00
15
29
<1.0
V0603MHS22N
30
<65
<100
0.5
1.00
15
29
<1.0
NOTES:
1. Tested to IEC-61000-4-2 Human Body Model (HBM) discharge test circuit.
2. Direct discharge to device terminals (IEC preferred test method).
3. Corona discharge through air (represents actual ESD event).
4. Capacitance may be customized, contact your Littelfuse Sales Representative.
5. V0402MHS03 available with Min: 2pF, Max 5pF as 'R' packing option, i.e. V0402MHS03NR.
Standby Current at Normalized Varistor Voltage and
Temperature
Peak Current and Energy Derating Curve
For applications exceeding 125ºC ambient temperature, the
peak surge current and energy ratings must be reduced as
shown below.
NORMALIZED VARISTOR VOLTAGE (V)
1.2
PERCENT OF RATED VALUE
100
80
60
40
1.0
0.8
25O
0.6
85O
0.4
125O
0.2
0.0
20
0.0001
0.001
0.01
50
60
70
80
90
100
110
120
0.1
1
CURRENT (mA)
Figure 2
0
-55
130 140 150
AMBIENT TEMPERATURE ( oC)
Figure 1
Insertion Loss (S21) Characteristics
Nominal Voltage Stability to Multiple ESD Impulses
(8kV Contact Discharges per IEC 61000-4-2)
0
INSERTION LOSS (dB)
NOMINAL VOLTAGE AT 1mADC
60
V0402MHS03
V0603MHS03
50
40
30
V0402MHS03
V0603MHS03
-20
-30
V0402MHS22
V0603MHS22
10
10
Figure 3
MHS Varistor Series
V0402MHS22
V0603MHS22
V0402MHS12
V0603MHS12
20
0
V0402MHS12
V0603MHS12
-10
Figure 4
1
10
100
1000
100
1000
10000
FREQUENCY (MHz)
10000
Number of Pulses
26
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MHS.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MHS Series
Device Characteristics
Speed of Response
At low current levels, the V-I curve of the multilayer
transient voltage suppressor approaches a linear (ohmic)
relationship and shows a temperature dependent effect.
At or below the maximum working voltage, the suppressor
is in a high resistance model (approaching 106Ω at its
maximum rated working voltage). Leakage currents at
maximum rated voltage are below 100μA, typically 25μA;
for 0402 size below 20μA, typically 5μA.
The Multilayer Suppressor is a leadless device. Its
response time is not limited by the parasitic lead
inductances found in other surface mount packages.
The response time of the ZNO dielectric material is less
than 1ns and the MLE can clamp very fast dV/dT events
such as ESD. Additionally, in “real world” applications,
the associated circuit wiring is often the greatest
factor effecting speed of response. Therefore, transient
suppressor placement within a circuit can be considered
important in certain instances.
Typical Temperature Dependance of the Characteristic
Curve in the Leakage Region
Multilayer Internal Construction
METAL
ELECTRODES
METAL END
TERMINATION
DEPLETION
REGION
25
10%
1E -9
Figure 5
1E -8
o
50o 75o
1E -7
100o 125 oC
1E -6
1E -5
1E -4
1E -3
DEPLETION
1E -2
REGION
Figure 6
SUPPRESSOR CURRENT (ADC)
GRAINS
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
components in surface mount technology are IR Re-flow
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
The recommended solder for the MHS suppressor is
a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb).
Littelfuse also recommends an RMA solder flux.
230
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
When using a reflow process, care should be taken to
ensure that the MHS chip is not subjected to a thermal
gradient steeper than 4 degrees per second; the ideal
gradient being 2 degrees per second. During the soldering
process, preheating to within 100 degrees of the solder's
peak temperature is essential to minimize thermal shock.
Figure 7
Wave Solder Profile
Once the soldering process has been completed, it is
still necessary to ensure that any further thermal shocks
are avoided. One possible cause of thermal shock is hot
printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room
temperature. The boards must be allowed to cool gradually
to less than 50ºC before cleaning.
Figure 8
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MHS.html for current information.
27
Revision: November 5, 2009
MHS Varistor Series
MHS Series
FIRED CERAMIC
DIELECTRIC
VNOM VALUE AT 25 oC (%)
SUPPRESSOR VOLTAGE IN PERCENT OF
100%
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MHS Series
Lead–free (Pb-free) Soldering Recommendations
Littelfuse offers the Nickel Barrier Termination finish for the
optimum Lead–free solder performance.
Lead–free Re-flow Profile
The preferred solder is 96.5/3.0/0.5 (SnAgCu) with an RMA
flux, but there is a wide selection of pastes and fluxes
available with which the Nickel Barrier parts should be
compatible.
MAXIMUM TEMPERATURE 260˚C
20 - 40 SECONDS WITHIN 5˚C
RAMP RATE
<3˚C/s
The reflow profile must be constrained by the maximums
in the Lead–free Reflow Profile. For Lead–free wave
soldering, the Wave Solder Profile still applies.
60 - 150 SEC
> 217˚C
PREHEAT ZONE
Note: the Lead–free paste, flux and profile were used for
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
three available, it is advised that the customer explores the
optimum combination for their process as processes vary
considerably from site to site.
5.0
6.0
7.0
Figure 10
Product Dimensions (mm)
PAD LAYOUT DEMENSIONS
CHIP LAYOUT DIMENSIONS
E
D
L
W
Note: Avoid metal runs in this area, parts are
not recommended for use in applications using
Silver (Ag) epoxy paste.
Dimension
0402 Size
IN
0603 Size
MM
IN
MM
A
0.067
1.700
0.100
2.540
B
0.020
0.510
0.030
0.760
C
0.024
0.610
0.035
0.890
D (max.)
0.024
0.600
0.040
1.000
E
0.10 +/- 0.006
0.25 +/- 0.15
0.015 +/- 0.008
0.4 +/- 0.2
L
0.039 +/- 0.004
1.00 +/- 0.10
0.063 +/- 0.006
1.6 +/- 0.15
W
0.020 +/- 0.004
0.50 +/- 0.10
0.032 +/- 0.006
0.8 +/- 0.15
MHS Varistor Series
28
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MHS.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MHS Series
Part Numbering System
V 0402 MHS 03 N H
PACKING OPTIONS (See quantities in Packaging section)
T: 13in (330mm) Diameter Reel, Plastic Carrier Tape (0603)
H: 7in (178mm) Diameter Reel, Plastic Carrier Tape
R: 7in (178mm) Diameter Reel, Paper Carrier Tape
DEVICE FAMILY
Littelfuse TVSS Device
DEVICE SIZE
i.e. 40Mil x 20Mil
(1.0mm x 0.5mm)
END TERMINATION OPTION
N: Nickel Barrier (Ni/Sn)
SERIES DESIGNATOR
CAPACITANCE DESIGNATION
03 = 3pF
12 = 12pF
22 = 22pF
Multilayer Hi-Speed
MHS Series
Packaging*
Quantity
Device Size
13 Inch Reel
("T" Option)
7 Inch Reel
("H" Option)
7 Inch Reel
("R" Option)
0603
10,000
2,500
4,000
0402
N/A
N/A
10,000
*(Packaging) It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags.
Tape and Reel Specifications
D0
T
P0
P2
E
F
K0
W
B0
T1
D1
P1
Symbol
A0
Dimensions in Millimeters
Description
0402 Size
0603 Size
A0
Width of Cavity
Dependent on Chip Size to Minimize Rotation.
B0
Length of Cavity
Dependent on Chip Size to Minimize Rotation.
K0
Depth of Cavity
Dependent on Chip Size to Minimize Rotation.
W
Width of Tape
8 -/+ 0.2
8 -/+ 0.3
F
Distance Between Drive Hole Centers and Cavity Centers
3.5 -/+.05
3.5 -/+.05
E
Distance Between Drive Hole Centers and Tape Edge
1.75 -/+ 0.1
1.75 -/+ 0.1
P1
Distance Between Cavity Centers
2 -/+ 0.05
4 -/+ 0.1
P2
Axial Drive Distance Between Drive Hole Centers & Cavity Centers
2 -/+ 0.1
2 -/+ 0.1
P0
Axial Drive Distance Between Drive Hole Centers
4 -/+ 0.1
4 -/+ 0.1
D0
Drive Hole Diameter
1.55 -/+ 0.05
1.55 -/+ 0.05
D1
Diameter of Cavity Piercing
N/A
1.05 -/+ 0.05
T1
Top Tape Thickness
0.1 Max
0.1 Max
T
Nominal Carrier Tape Thickness
1.1
1.1
Notes:
• Conforms to EIA-481-1, Revision A
• Can be supplied to IEC publication 286-3
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MHS.html for current information.
29
Revision: November 5, 2009
MHS Varistor Series
Varistor Products
30
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLE Series
RoHS
MLE Varistor Series
Description
The fabrication method and materials of these devices
result in capacitance characteristics suitable for high
frequency attenuation/low-pass filter circuit functions,
thereby providing suppression and filtering in a single
device.
Size Table
Metric
EIA
1005
0402
1608
0603
2012
0805
3216
1206
The MLE Series is manufactured from semiconducting
ceramics and is supplied in a leadless, surface mount
package. The MLE Series is compatible with modern reflow
and wave soldering procedures.
Littelfuse Inc. manufactures other Multilayer Series
products. See the ML Series data sheet for higher energy/
peak current transient applications. See the AUML Series
for automotive applications and the MLN Quad Array. For
high–speed applications see the MHS Series.
Applications
•
•
Protection of
components and
circuits sensitive
to ESD Transients
occurring on power
supplies, control
and signal lines
Suppression of
ESD events such
as specified in
IEC-61000-4-2 or
MIL-STD-883C
Method-3015.7, for
Features
•
electromagnetic
compliance (EMC)
•
AEC - Q200 compliant
•
-55ºC to +125ºC
operating temp. range
•
RoHS Compliant
Used in mobile
communications,
computer/EDP
products, medical
products, hand held/
portable devices,
industrial equipment,
including diagnostic
port protection and
I/O interfaces
•
Rated for ESD
(IEC-61000-4-2)
•
Leadless 0402, 0603,
0805, and 1206 sizes
•
Characterized for
impedance and
capacitance
•
Operating voltages
up to 18VM(DC)
•
Multilayer ceramic
construction technology
Absolute Maximum Ratings
• For ratings of individual members of a series, see device ratings and specifications table.
Continuous
MLE Series
Units
Steady State Applied Voltage:
DC Voltage Range (VM(DC))
≤18
V
Operating Ambient Temperature Range (TA)
-55 to +125
ºC
Storage Temperature Range (TSTG)
-55 to +150
C
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLE.html for current information.
31
Revision: November 5, 2009
MLE Varistor Series
MLE Series
The MLE Series family of transient voltage suppression
devices are based on the Littelfuse multilayer fabrication
technology. These components are designed to suppress
ESD events, including those specified in IEC 61000-4-2
or other standards used for Electromagnetic Compliance
testing. The MLE Series is typically applied to protect
integrated circuits and other components at the circuit
board level operating at 18VDC, or less.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLE Series
Device Ratings and Specifications
Max Continuous
Working Voltage
-55ºC to 125ºC
Part Number
Nominal
Voltage
VNOM at
1mA DC
MIN (V) MAX (V)
22
28
22
28
22
28
(Note 1)
VM(DC)
V18MLE0402N
V18MLE0603N
V18MLE0603LN
(V)
18
18
18
V18MLE0805N
V18MLE0805LN
V18MLE1206N
18
18
18
Performance Specifications (25ºC)
Maximum Clamping
Maximum ESD Clamp
Voltage at Specified
Voltage (Note 2)
Current (8/20μs)
22
22
22
28
28
28
15kV Air
Typical
Capacitance
at 1MHz
VC
8kV Contact
(Note 3)
(Note 4)
(V)
50 at 1A
50 at 1A
50 at 1A
(V)
<125
<75
<100
Clamp (V)
<110
<110
<140
(pF)
<55
<125
<100
50 at 1A
50 at 1A
50 at 1A
<70
<75
<65
<75
<135
<65
<500
<100
<1700
NOTES:
1. For applications of 18VDC or less. Higher voltages available, contact your Littelfuse Sales Representative.
2. Tested with IEC-61000-4-2 Human Body Model (HBM) discharge test circuit.
3. Direct discharge to device terminals (IEC preferred test method).
4. Corona discharge through air (represents actual ESD event).
5. Capacitance may be customized, contact your Littelfuse Sales Representative.
6. Leakage current ratings are at 18 VDC and 25μA maximum.
Nominal Voltage Stability to Multiple ESD Impulses
(8kV Contact Discharges per IEC 61000-4-2)
Peak Current and Energy Derating Curve
For applications exceeding 125ºC ambient temperature, the
peak surge current and energy ratings must be reduced as
shown below.
NOMINAL VOLTAGE AT 1mADC
30
PERCENT OF RATED VALUE
100
80
60
25
20
15
10
5
40
0
10
1
20
0
-55
100
Figure 2
50
60
70
80
90
100
110
120
1000
10000
CURRENT (A)
130 140 150
AMBIENT TEMPERATURE ( oC)
Figure 1
Impedance (Z) vs Frequency Typical Characteristic
100
Standby Current at Normalized Varistor Voltage and
Temperature
-0402
-0603
10
-0805
IMPEDANCE (Z)
NORMALIZED VARISTOR VOLTAGE (V)
1.2
1.0
0.8
-1206
1
0.1
25O
0.6
85O
0.01
0.4
10
Figure 4
125O
0.2
100
1000
10000
FREQUENCY (MHz)
0.0
0.0001
Figure 3
MLE Varistor Series
0.001
0.01
0.1
1
CURRENT (mA)
32
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLE.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLE Series
Device Characteristics
Clamping Voltage Over Temperature (VC at 10A)
At low current levels, the V-I curve of the multilayer
transient voltage suppressor approaches a linear (ohmic)
relationship and shows a temperature dependent effect.
At or below the maximum working voltage, the suppressor
is in a high resistance model (approaching 106Ω at its
maximum rated working voltage). Leakage currents at
maximum rated voltage are below 100μA, typically 25μA;
for 0402 size below 20μA, typically 5μA.
CLAMPING VOLTAGE (V)
100
V26MLA1206
Typical Temperature Dependance of the Haracteristic
Curve in the Leakage Region
V5.5MLA1206
-40
Figure 6
-20
0
20
40
60
80
TEMPERATURE ( oC)
100
120
140
MLE Series
10
-60
VNOM VALUE AT 25 oC (%)
SUPPRESSOR VOLTAGE IN PERCENT OF
100%
Energy Absorption/Peak Current Capability
25
10%
1E -9
o
50o 75o
1E -8
1E -7
Figure 5
Energy dissipated within the MLE is calculated by
multiplying the clamping voltage, transient current
and transient duration. An important advantage of the
multilayer is its interdigitated electrode construction within
the mass of dielectric material. This results in excellent
current distribution and the peak temperature per energy
absorbed is very low. The matrix of semiconducting grains
combine to absorb and distribute transient energy (heat)
(see Speed of Response). This dramatically reduces peak
temperature; thermal stresses and enhances device
reliability.
100o 125 oC
1E -6
1E -5
1E -4
1E -3
1E -2
SUPPRESSOR CURRENT (ADC)
Speed of Response
The Multilayer Suppressor is a leadless device. Its
response time is not limited by the parasitic lead
inductances found in other surface mount packages.
The response time of the ZNO dielectric material is less
than 1ns and the MLE can clamp very fast dV/dT events
such as ESD. Additionally, in "real world" applications,
the associated circuit wiring is often the greatest
factor effecting speed of response. Therefore, transient
suppressor placement within a circuit can be considered
important in certain instances.
As a measure of the device capability in energy and peak
current handling, the V26MLA1206A part was tested with
multiple pulses at its peak current rating (150A, 8/20μs). At
the end of the test, 10,000 pulses later, the device voltage
characteristics are still well within specification.
Repetitive Pulse Capability
Multilayer Internal Construction
100
PEAK CURRENT = 150A
8/20 s DURATION, 30s BETWEEN PULSES
FIRED CERAMIC
DIELECTRIC
VOLTAGE
V26MLA1206
METAL
ELECTRODES
METAL END
TERMINATION
DEPLETION
10
REGION
0
Figure 8
DEPLETION
2000
4000
6000
8000
10000
12000
NUMBER OF PULSES
REGION
Figure 7
GRAINS
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLE.html for current information.
33
Revision: November 5, 2009
MLE Varistor Series
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLE Series
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
components in surface mount technology are IR Re-flow
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
The recommended solder for the MLE suppressor is
a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb).
Littelfuse also recommends an RMA solder flux.
230
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
When using a reflow process, care should be taken to
ensure that the MLE chip is not subjected to a thermal
gradient steeper than 4 degrees per second; the ideal
gradient being 2 degrees per second. During the soldering
process, preheating to within 100 degrees of the solder's
peak temperature is essential to minimize thermal shock.
Figure 9
Wave Solder Profile
Once the soldering process has been completed, it is
still necessary to ensure that any further thermal shocks
are avoided. One possible cause of thermal shock is hot
printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room
temperature. The boards must be allowed to cool gradually
to less than 50ºC before cleaning.
Figure 10
Lead–free (Pb-free) Soldering Recommendations
Littelfuse offers the Nickel Barrier Termination finish for the
optimum Lead–free solder performance.
Lead–free Re-flow Profile
The preferred solder is 96.5/3.0/0.5 (SnAgCu) with an RMA
flux, but there is a wide selection of pastes and fluxes
available with which the Nickel Barrier parts should be
compatible.
MAXIMUM TEMPERATURE 260˚C
20 - 40 SECONDS WITHIN 5˚C
RAMP RATE
<3˚C/s
The reflow profile must be constrained by the maximums
in the Lead–free Reflow Profile. For Lead–free Wave
soldering, the Wave Solder Profile still applies.
PREHEAT ZONE
Note: the Lead–free paste, flux and profile were used for
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
three available, it is advised that the customer explores the
optimum combination for their process as processes vary
considerably from site to site.
MLE Varistor Series
60 - 150 SEC
> 217˚C
5.0
6.0
7.0
Figure 11
34
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLE.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLE Series
Product Dimensions (mm)
PAD LAYOUT DEMENSIONS
CHIP LAYOUT DIMENSIONS
C
E
B
NOTE
D
L
A
Note: Avoid metal runs in this area, parts are
not recommended for use in applications using
Silver (Ag) epoxy paste.
Dimension
A
1206 Size
0805 Size
0603 Size
0402 Size
IN
MM
IN
MM
IN
MM
IN
MM
0.160
4.06
0.120
3.05
0.100
2.54
0.067
1.70
B
0.065
1.65
0.050
1.27
0.030
0.76
0.020
0.51
C
0.040
1.02
0.040
1.02
0.035
0.89
0.024
0.61
D (max.)
0.071
1.80
0.043
1.10
1.00
0.02 -/+ 0.01
0.50 -/+ 0.25
0.02 -/+ 0.01
0.50 -/+ 0.25
L
0.125 -/+
0.012
3.20 -/+ 0.03
W
0.06 -/+ 0.011
1.60 -/+ 0.28
0.024
0.010 -/+
0.006
0.039 -/+
0.004
0.020 -/+
0.004
0.60
E
0.040
0.015 -/+
0.008
0.063 -/+
0.006
0.032 -/+
0.006
0.079 -/+
0.008
0.049 -/+
0.008
2.01 -/+ 0.2
1.25 -/+ 0.2
0.4 -/+ 0.2
1.6 -/+ 0.15
0.8 -/+ 0.15
0.25 -/+ 0.15
1.0 -/+ 0.1
0.5 -/+ 0.1
Part Numbering System
V 18 MLE 1206 X X X
PACKING OPTIONS (see Packaging section for quantities)
T: 13in (330mm) Diameter Reel, Plastic Carrier Tape
H: 7in (178mm) Diameter Reel, Plastic Carrier Tape
R: 7in (178mm) Diameter Reel, Paper Carrier Tape
DEVICE FAMILY
Littelfuse TVSS Device
MAXIMUM DC
WORKING VOLTAGE
END TERMINATION OPTION
N: Nickel Barrier (Ni/Sn)
MULTILAYER SERIES
DESIGNATOR
CAPACITANCE OPTION
No Letter: Standard
L: Low Capacitance Version
DEVICE SIZE:
i.e., 120 mil x 60 mil
(3mm x 1.5mm)
Packaging*
Quantity
Device Size
13” Inch Reel
'T' Option)
7” Inch Reel
('H' Option)
7” Inch Reel
('R' Option)
Bulk Pack
('A' Option)
1206
10,000
2,500
N/A
2500
0805
10,000
2,500
N/A
2500
0603
10,000
2,500
4,000
2500
0402
N/A
N/A
10,000
N/A
*(Packaging) It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLE.html for current information.
35
Revision: November 5, 2009
MLE Varistor Series
MLE Series
W
NOTE: Avoid metal runs in this area.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLE Series
Tape and Reel Specifications
D0
PRODUCT
IDENTIFYING
LABEL
P0
For T and H Pack Options: PLASTIC CARRIER TAPE
For R Pack Options: EMBOSSED PAPER CARRIER TAPE
P2
E
F
K0
W
B0
t1
D1
P1
Symbol
EMBOSSMENT
TOP TAPE
A0
178mm
OR 330mm
DIA. REEL
8mm
NOMINAL
Dimensions in Millimeters
Description
0402 Size
0603, 0805 & 1206 Sizes
A0
Width of Cavity
Dependent on Chip Size to Minimize Rotation.
B0
Length of Cavity
Dependent on Chip Size to Minimize Rotation.
Dependent on Chip Size to Minimize Rotation.
K0
Depth of Cavity
W
Width of Tape
8 -/+ 0.2
8 -/+ 0.3
F
Distance Between Drive Hole Centers and Cavity Centers
3.5 -/+ 0.05
3.5 -/+ 0.05
E
Distance Between Drive Hole Centers and Tape Edge
1.75 -/+ 0.1
1.75 -/+ 0.1
P1
Distance Between Cavity Centers
2 -/+ 0.05
4 -/+ 0.1
P2
Axial Drive Distance Between Drive Hole Centers & Cavity Centers
2 -/+ 0.1
2 -/+ 0.1
P0
Axial Drive Distance Between Drive Hole Centers
D0
Drive Hole Diameter
D1
Diameter of Cavity Piercing
T1
Top Tape Thickness
4 -/+ 0.1
4 -/+ 0.1
1.55 -/+ 0.05
1.55 -/+ 0.05
N/A
1.05 -/+ 0.05
0.1 Max
0.1 Max
Notes :
• Conforms to EIA-481-1, Revision A
• Can be supplied to IEC publication 286-3
MLE Varistor Series
36
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLE.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
RoHS
ML Varistor Series
Description
The wide operating voltage and energy range make the ML
Series suitable for numerous applications on power supply,
control and signal lines.
The ML Series is manufactured from semiconducting
ceramics, and is supplied in a leadless, surface mount
package. The ML Series is compatible with modern reflow
and wave soldering procedures.
Size Table
Metric
EIA
1005
0402
1608
0603
2012
0805
3216
1206
3225
1210
It can operate over a wider temperature range than Zener
diodes, and has a much smaller footprint than plastichoused components.
Littelfuse Inc. manufactures other multilayer series
products. See the MLE Series data sheet for ESD
applications, MHS Series data sheet for high-speed ESD
applications, the MLN Series for multiline protection and
the AUML Series for automotive applications.
Applications
•
•
•
Suppression of inductive
switching or other
transient events such as
EFT and surge voltage at
the circuit board level
ESD protection for IEC
61000-4-2, MIL-STD883c method 3015.7,
and other industry
specifications (see also
the MLE or MLN Series)
•
•
Used to help achieve
electromagnetic
compliance of
end products
Features
Replace larger surface
mount TVS Zeners in
many applications
Provides on-board
transient voltage
protection for ICS
and transistors
•
AEC - Q200 compliant
•
RoHS compliant
•
Leadless 0402, 0603,
0805, 1206 and
1210 chip sizes
•
Multilayer ceramic
construction technology
•
-55°C to +125°C
operating temp. range
•
Operating voltage range
VM(DC) = 5.5V to 120V
•
Rated for surge
current (8 x 20μs)
•
Rated for energy
(10 x 1000μs)
•
Inherent bi-directional
clamping
•
No plastic or epoxy
packaging assures
better than UL94V-0
flammability rating
•
Standard low capacitance
types available
Absolute Maximum Ratings
For ratings of individual members of a series, see device ratings and specifications table.
Continuous
Steady State Applied Voltage:
DC Voltage Range (VM(DC))
AC Voltage Range (VM(AC)RMS)
Transient:
Non-Repetitive Surge Current, 8/20μs Waveform, (ITM)
Non-Repetitive Surge Energy, 10/1000μs Waveform, (WTM)
Operating Ambient Temperature Range (TA)
Storage Temperature Range (TSTG)
Temperature Coefficient (DV) of Clamping Voltage (VC) at
Specified Test Current
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
ML Series
Units
3.5 to 120
2.5 to 107
V
V
4 to 500
0.02 to 2.5
-55 to +125
-55 to +150
A
J
ºC
ºC
<0.01
%/º C
37
Revision: November 5, 2009
ML Varistor Series
ML Series
The ML Series family of transient voltage surge
suppression devices is based on the Littelfuse Multilayer
fabrication technology. These components are designed
to suppress a variety of transient events, including those
specified in IEC 61000-4-2 or other standards used for
Electromagnetic Compliance (EMC). The ML Series is
typically applied to protect integrated circuits and other
components at the circuit board level.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
Device Ratings and Specifications
Part Number
V3.5MLA0603N5
V3.5MLA0805N
V3.5MLA0805LN
V3.5MLA1206N
V5.5MLA0402N
V5.5MLA0402LN
V5.5MLA0603N5
V5.5MLA0603LN4
V5.5MLA0805N
V5.5MLA0805LN
V5.5MLA1206N
V9MLA0402N
V9MLA0402LN
V9MLA0603N5
V9MLA0603LN4
V9MLA0805LN
V12MLA0805LN
V14MLA0402N
V14MLA0603N
V14MLA0805N
V14MLA0805LN
V14MLA1206N
V18MLA0402N
V18MLA0603N
V18MLA0805N
V18MLA0805LN
V18MLA1206N
V18MLA1210N
V26MLA0603N
V26MLA0805N
V26MLA0805LN
V26MLA1206N
V26MLA1210N
V30MLA0603N
V30MLA0805LN
V30MLA1210N
V30MLA1210LN
V33MLA1206N
V42MLA1206N
V48MLA1210N
V48MLA1210LN
V56MLA1206N
V60MLA1210N
V68MLA1206N
V85MLA1210N
V120MLA1210N
Maximum Ratings (125º C)
Specifications (25ºC)
Maximum
Maximum Non- Maximum Non- Maximum Clamping Nominal Voltage
Typical
Continuous
repetitive Surge repetitive Surge Voltage at 1A (or as at 1mA DC Test Capacitance
Working Voltage Current (8/20μs) Energy (10/1000μs)
Noted) (8/20μs)
Current
at f = 1MHz
VN(DC)
VN(DC)
VM(DC)
VM(AC)
ITM
WTM
VC
C
Min
Max
(V)
(V)
(A)
(J)
(V)
(V)
(V)
(pF)
3.5
2.5
30
0.100
13.0
3.7
7.0
1270
3.5
2.5
120
0.300
13.0
3.7
7.0
2530
3.5
2.5
40
0.100
13.0
3.7
7.0
1380
3.5
2.5
100
0.300
13.0
3.7
7.0
6000
5.5
4.0
20
0.050
21.0
7.1
10.8
220
5.5
4.0
20
0.050
39.0
15.9
21.5
70
5.5
4.0
30
0.100
17.5
7.1
9.3
760
5.5
4.0
30
0.100
17.5
7.1
9.3
450
5.5
4.0
120
0.300
17.5
7.1
9.3
1840
5.5
4.0
40
0.100
17.5
7.1
9.3
990
5.5
4.0
150
0.400
17.5
7.1
9.3
3500
9.0
6.5
20
0.050
30.0
11.0
16.0
120
9.0
6.5
4
0.020
35.0
11.0
16.0
33
9.0
6.5
30
0.100
25.5
11.0
16.0
490
9.0
6.5
30
0.100
25.5
11.0
16.0
360
9.0
6.5
40
0.100
25.5
11.0
16.0
520
12.0
9.0
40
0.100
29.0
14.0
18.5
410
14.0
10.0
20
0.050
39.0
15.9
21.5
70
14.0
10.0
30
0.100
34.5
15.9
21.5
180
14.0
10.0
120
0.300
32.0
15.9
20.3
560
14.0
10.0
40
0.100
32.0
15.9
20.3
320
14.0
10.0
150
0.400
32.0
15.9
20.3
1400
18.0
14.0
20
0.050
50.0
22.0
28.0
40
18.0
14.0
30
0.100
50.0
22.0
28.0
120
18.0
14.0
120
0.300
44.0
22.0
28.0
520
18.0
14.0
40
0.100
44.0
22.0
28.0
290
18.0
14.0
150
0.400
44.0
22.0
28.0
1270
18.0
14.0
500
2.500
44.0 at 2.5
22.0
28.0
1440
26.0
20.0
30
0.100
60.0
31.0
38.0
110
26.0
20.0
100
0.300
60.0
29.5
38.5
220
26.0
20.0
40
0.100
60.0
29.5
38.5
140
26.0
20.0
150
0.600
60.0
29.5
38.5
600
26.0
20.0
300
1.200
60.0 at 2.5
29.5
38.5
1040
30.0
25.0
30
0.100
74.0
37.0
46.0
90
30.0
25.0
30
0.100
72.0
37.0
46.0
90
30.0
25.0
280
1.200
68.0 at 2.5
35.0
43.0
1820
30.0
25.0
220
0.900
68.0 at 2.5
35.0
43.0
1760
0.800
75.0
38.0
49.0
500
33.0
26.0
180
42.0
30.0
180
0.800
92.0
46.0
60.0
425
48.0
40.0
250
1.200
105.0 at 2.5
54.5
66.5
520
48.0
40.0
220
0.900
105.0 at 2.5
54.5
66.5
500
56.0
40.0
180
1.000
120.0
61.0
77.0
180
60.0
50.0
250
1.500
130.0 at 2.5
67.0
83.0
440
68.0
50.0
180
1.000
140.0
76.0
90.0
100
85.0
67.0
250
2.500
180.0 at 2.5
95.0
115.0
260
120.0
107.0
125
2.000
260.0 at 2.5
135.0
165.0
80
NOTES:
1 'L' suffix is a low capacitance and energy version; Contact your Littelfuse sales representative for custom capacitance requirements
2 Typical leakage at 25ºC<25μA, maximum leakage 100μA at VM(DC); for 0402 size, typical leakage <5μA, maximum leakage <20μA at VM(DC)
3 Average power dissipation of transients for 0402, 0603, 0805, 1206 and 1210 sizes not to exceed 0.03W, 0.05W, 0.1W, 0.1W and 0.15W respectively
4 Only available in 'R' packing option
5 Only available in 'H','T'and 'A' packing options
ML Varistor Series
38
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
Peak Current and Energy Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
100
PERCENT OF PEAK VALUE
When transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown
on the Device Ratings and Specifications Table for the
specific device. For applications exceeding 125°C ambient
temperature, the peak surge current and energy ratings
must be derated as shown below.
50
0
T
PERCENT OF RATED VALUE
O1
TIME
T1
Figure 2
80
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
60
40
20
0
-55
50
60
70
80
90
100
110
120
130 140 150
AMBIENT TEMPERATURE ( oC)
Figure 1
Limit V-I Characteristic for V5.5MLA0402 to V18MLA0402
Limit V-I Characteristic for V9MLA0402L
100
10
Varistor Voltage (V)
Varistor Voltage (V)
100
V18MLA0402
V14MLA0402
V9MLA0402
V5.5MLA0402
1
1μA
T2
ML Series
100
10μA
100μA
1mA
10mA
1A
10A
V9MLA0402L
V5.5MLA0402L
1
1μA
100A
Current (A)
Figure 3
10
10μA
100μA
Figure 4
Limit V-I Characteristic for V3.5MLA0603 to V30MLA0603
1mA
10mA
1A
10A
100A
Current (A)
Limit V-I Characteristic for V3.5MLA0805L to V30MLA0805L
1000
1000
V30MLA0805L
V26MLA0805L
V30MLA0603
V18MLA0805L
V26MLA0603
Varistor Voltage (V)
V18MLA0603
100
Varistor Voltage (V)
V14MLA0603
10
V9MLA0603, V9MLA0603L
100
V14MLA0805L
10
V12MLA0805L
V9MLA0805L
V5.5MLA0603, V5.5MLA0603L
V5.5MLA0805L
V3.5MLA0603
V3.5MLA0805L
1
10μA
Figure 5
1
10μA
100μA
1mA
10mA
Current (A)
100mA
1A
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
10A
100A
Figure 6
39
Revision: November 5, 2009
100μA
1mA
10mA
100mA
1A
10A
100A
Current (A)
ML Varistor Series
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
Limit V-I Characteristic for V3.5MLA0805 to V26MLA0805
Limit V-I Characteristic for V3.5MLA1206 to V68MLA1206
1000
100
Varistor Voltage (V)
Varistor Voltage (V)
1000
V26MLA0805
10
V18MLA0805
100
V68MLA1206
V56MLA1206
V42MLA1206
V33MLA1206
V26MLA1206
V18MLA1206
V14MLA1206
V5.5MLA1206
V3.5MLA1206
10
V14MLA0805
V5.5MLA0805
V3.5MLA0805
1
10μA
100μA
1mA
10mA
100mA
1A
10A
100A
1000A
Current (A)
Figure 7
1
10μA
100μA
1mA
10mA
100mA
Current (A)
1A
10A
100A
1000A
Figure 8
Limit V-I Characteristic for V18MLA1210 to V120MLA1210
1000
MAXIMUM CLAMPING VOLTAGE
MAXIMUM LEAKAGE
Varistor Voltage (V)
100
V120MLA1210
10
V85MLA1210
V60MLA1210
V48MLA1210, V48MLA1210L
V30MLA1210, V30MLA1210L
V26MLA1210
1
10μA
V18MLA1210
100μA
Figure 9
ML Varistor Series
1mA
10mA
100mA
1A
10A
100A
1000A
CURRENT (A)
40
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
Clamping Voltage Over Temperature (VC at 10A)
Device Characteristics
At low current levels, the V-I curve of the multilayer
transient voltage suppressor approaches a linear (ohmic)
relationship and shows a temperature dependent effect.
At or below the maximum working voltage, the suppressor
is in a high resistance modex (approaching 106Ω at its
maximum rated working voltage). Leakage currents at
maximum rated voltage are below 100μA, typically 25μA;
for 0402 size below 20μA, typically 5μA.
CLAMPING VOLTAGE (V)
100
V26MLA1206
V5.5MLA1206
10
-60
-40
Figure 11
VNOM VALUE AT 25 oC (%)
SUPPRESSOR VOLTAGE IN PERCENT OF
100%
-20
0
20
40
60
80
TEMPERATURE ( oC)
100
120
140
ML Series
Typical Temperature Dependance of the Haracteristic
Curve in the Leakage Region
Energy Absorption/Peak Current Capability
25
10%
1E -9
o
50o 75o
1E -8
100o 125 oC
1E -7
Figure 10
Energy dissipated within the ML Series is calculated
by multiplying the clamping voltage, transient current
and transient duration. An important advantage of the
multilayer is its interdigitated electrode construction within
the mass of dielectric material. This results in excellent
current distribution and the peak temperature per energy
absorbed is very low. The matrix of semiconducting grains
combine to absorb and distribute transient energy (heat)
(see Speed of Response). This dramatically reduces peak
temperature; thermal stresses and enhances device
reliability.
1E -6
1E -5
1E -4
1E -3
1E -2
SUPPRESSOR CURRENT (ADC)
Speed of Response
The Multilayer Suppressor is a leadless device. Its
response time is not limited by the parasitic lead
inductances found in other surface mount packages.
The response time of the ZNO dielectric material is less
than 1ns and the ML can clamp very fast dV/dT events
such as ESD. Additionally, in "real world" applications,
the associated circuit wiring is often the greatest
factor effecting speed of response. Therefore, transient
suppressor placement within a circuit can be considered
important in certain instances.
As a measure of the device capability in energy and peak
current handling, the V26MLA1206A part was tested with
multiple pulses at its peak current rating (150A, 8/20μs). At
the end of the test,10,000 pulses later, the device voltage
characteristics are still well within specification.
Repetitive Pulse Capability
Multilayer Internal Construction
100
PEAK CURRENT = 150A
8/20 s DURATION, 30s BETWEEN PULSES
FIRED CERAMIC
DIELECTRIC
VOLTAGE
V26MLA1206
METAL
ELECTRODES
METAL END
TERMINATION
10
DEPLETION
0
REGION
Figure 13
2000
4000
6000
8000
10000
12000
NUMBER OF PULSES
DEPLETION
REGION
Figure 12
GRAINS
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
41
Revision: November 5, 2009
ML Varistor Series
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
components in surface mount technology are IR Re-flow
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
250
The recommended solder for the ML suppressor is
a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb).
Littelfuse also recommends an RMA solder flux.
MAXIMUM TEMPERATURE
230°C
TEMPERATURE °C
200
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
40-80
SECONDS
ABOVE 183°C
150
RAMP RATE
<2°C/s
100
PREHEAT DWELL
50
When using a reflow process, care should be taken to
ensure that the ML chip is not subjected to a thermal
gradient steeper than 4 degrees per second; the ideal
gradient being 2 degrees per second. During the soldering
process, preheating to within 100 degrees of the solder's
peak temperature is essential to minimize thermal shock.
PREHEAT ZONE
0
Figure 14
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
TIME (MINUTES)
Wave Solder Profile
Once the soldering process has been completed, it is
still necessary to ensure that any further thermal shocks
are avoided. One possible cause of thermal shock is hot
printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room
temperature. The boards must be allowed to cool gradually
to less than 50º C before cleaning.
300
MAXIMUM WAVE 260°C
TEMPERATURE °C
250
200
150
SECOND PREHEAT
100
FIRST PREHEAT
50
0
0.0
0.5
1.0
1.5
Figure 15
2.0
2.5
3.0
TIME (MINUTES)
3.5
4.0
4.5
Lead–free (Pb-free) Soldering Recommendations
Littelfuse offers the Nickel Barrier Termination option (see
"N" suffix in Part Numbering System for ordering) for the
optimum Lead–free solder performance, consisting of a
Matte Tin outer surface plated on Nickel underlayer, plated
on Silver base metal.
Lead–free Re-flow Solder Profile
300
MAXIMUM TEMPERATURE 260˚C,
TIME WITHIN 5˚C OF PEAK
20 SECONDS MAXIMUM
250
TEMPERATURE °C
The preferred solder is 96.5/3.0/0.5 (SnAgCu) with an RMA
flux, but there is a wide selection of pastes and fluxes
available with which the Nickel Barrier parts should be
compatible.
The reflow profile must be constrained by the maximums
in the Lead–free Reflow Profile. For Lead–free wave
soldering, the Wave Solder Profile still applies.
60 - 150 SEC
> 217˚C
150
100
PREHEAT ZONE
50
0
Note: the Lead–free paste, flux and profile were used for
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
three available, it is advised that the customer explores the
optimum combination for their process as processes vary
considerably from site to site.
ML Varistor Series
RAMP RATE
<3˚C/s
200
Figure 16
42
Revision: November 5, 2009
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
TIME (MINUTES)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
Product Dimensions (mm)
PAD LAYOUT DIMENSIONS
CHIP LAYOUT DIMENSIONS
C
E
B
NOTE
D
L
W
A
1210 Size
Dimension
1206 Size
IN
MM
A
0.160
B
0.100
C
0805 Size
IN
MM
4.06
0.160
2.54
0.065
0.040
1.02
0.040
D (max.)
0.113
2.87
0.071
1.80
E
0.020
-/+0.010
0.50
-/+0.25
0.020
-/+0.010
0.50
-/+0.25
L
0.125
-/+0.012
3.20
-/+0.30
0.125
-/+0.012
3.20
-/+0.30
W
0.100
-/+0.012
2.54
-/+0.30
0.060
-/+0.011
1.60
-/+0.28
0603 Size
IN
MM
4.06
0.120
1.65
0.050
1.02
0.040
0402 Size
IN
MM
IN
MM
3.05
0.100
2.54
0.067
1.70
1.27
0.030
0.76
0.020
0.51
1.02
0.035
0.89
0.024
0.61
0.043
1.10
0.040
1.00
0.024
0.60
0.020 -/+
0.010
0.50 -/+
0.25
0.015
-/+0.008
0.4
-/+0.20
0.010
-/+0.006
0.25
-/+0.15
0.079
-/+0.008
2.01
-/+0.20
0.063
-/+0.006
1.6
-/+0.15
0.039
-/+0.004
1.00
-/+0.10
0.049
-/+0.008
1.25
-/+0.20
0.032
-/+0.060
0.8
-/+0.15
0.020
-/+0.004
0.50
-/+0.10
Part Numbering System
V 18 MLA 1206 X X X
PACKING OPTIONS (see Packaging table for quantities)
T: 13in (330mm) Diameter Reel, Plastic Carrier Tape
H: 7in (178mm) Diameter Reel, Plastic Carrier Tape
R: 7in (178mm) Diameter Reel, Paper Carrier Tape
DEVICE FAMILY
Littelfuse TVSS Device
MAXIMUM DC
WORKING VOLTAGE
END TERMINATION OPTION
No Letter: Standard
N: Nickel Barrier Option
(Matte Tin outer surface, plated on Nickel underlayer
plated on silver base metal)
CAPACITANCE OPTION
No Letter: Standard
L: Low Capacitance Version
MULTILAYER SERIES
DESIGNATOR
DEVICE SIZE:
i.e., 120 mil x 60 mil
(3mm x 1.5mm)
*NOTES:
1 V120MLA1210 standard shipping quantities are 1000 pieces per reel for the "H" option and 4000 pieces per reel for "T" option.
2 V3.5 MLA0603, V5.5MLA0603 and V9MLA0603 only available in "H," "T" and "A" packing options.
Packaging*
Quantity
Device Size
13” Inch Reel
("T" Option)
7” Inch Reel
("H" Option)
7” Inch Reel
("R" Option)
Bulk Pack
("A" Option)
1210
1206
0805
0603
0402
8,000
10,000
10,000
10,000
N/A
2,000
2,500
2,500
2,500
N/A
N/A
N/A
N/A
4,000
10,000
2,000
2,500
2,500
2,500
N/A
*(Packaging) It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
43
Revision: November 5, 2009
ML Varistor Series
ML Series
NOTE : Avoid metal runs in this area, parts not recommended for use in applications using
Silver (Ag) epoxy paste.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > ML Series
Tape and Reel Specifications
D0
PRODUCT
IDENTIFYING
LABEL
P0
For T and H Pack Options: PLASTIC CARRIER TAPE
For R Pack Options: EMBOSSED PAPER CARRIER TAPE
P2
E
F
K0
W
B0
t1
D1
P1
Symbol
EMBOSSMENT
TOP TAPE
A0
8mm
NOMINAL
178mm
OR 330mm
DIA. REEL
Dimensions in Millimeters
Description
0402 Size
0603, 0805, 1206 & 1210 Sizes
A0
Width of Cavity
Dependent on Chip Size to Minimize Rotation.
B0
Length of Cavity
Dependent on Chip Size to Minimize Rotation.
Dependent on Chip Size to Minimize Rotation.
K0
Depth of Cavity
W
Width of Tape
8 -/+0.2
8 -/+0.3
F
Distance Between Drive Hole Centers and Cavity Centers
3.5 -/+0.05
3.5 -/+0.05
E
Distance Between Drive Hole Centers and Tape Edge
1.75 -/+0.1
1.75 -/+0.1
P1
Distance Between Cavity Centers
2-/+0.05
4 -/+0.1
P2
Axial Drive Distance Between Drive Hole Centers & Cavity Centers
2 -/+0.1
2 -/+0.1
P0
Axial Drive Distance Between Drive Hole Centers
D0
Drive Hole Diameter
D1
Diameter of Cavity Piercing
T1
Top Tape Thickness
4 -/+0.1
4 -/+0.1
1.55 -/+0.05
1.55 -/+0.05
N/A
1.05 -/+0.05
0.1 Max
0.1 Max
NOTES:
• Conforms to EIA-481-1, Revision A
• Can be supplied to IEC publication 286-3
ML Varistor Series
44
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ML.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLN Series
MLN SurgeArray™ Suppressor
RoHS
Description
SurgeArray™ devices are intended to suppress ESD, EFT
and other transients in order to protect integrated circuits
or other sensitive components operating at any voltage
up to 18VDC. SurgeArray™ devices are rated to the IEC
61000-4-2 human body model ESD to help products attain
EMC compliance. The array offers excellent isolation and
low crosstalk between sections.
Size Table
Metric
EIA
3216
1206
The inherent capacitance of the SurgeArray™ Suppressor
permits it to function as a filter/suppressor, thereby
replacing separate Zener/capacitor combinations.
The MLN array is manufactured using the Littelfuse
Multilayer technology process and is similar to the
Littelfuse ML and MLE Series of discrete leadless chips.
Applications
Features
•
Data, Diagnostic
I/O Ports
Communications/
Cellular Phones
•
Analog Signal/
Sensor Lines
•
Computer/DSP
Products
•
Portable/HandHeld Products
•
Industrial Instruments
Including Medical
•
Mobile
•
RoHS Compliant
•
Low leakage
•
Four individual
devices in one chip
•
Operating voltage
up to 18VM(DC)
•
ESD rated to IEC
61000-4-2 (Level 4)
•
-55ºC to 125ºC
operating temp range
•
AC characterized
for impedance and
capacitance
•
Low-profile, PCMCIA
compatible
•
Low adjacent channel
crosstalk, -55dB
at 10MHz (Typ)
Absolute Maximum Ratings
• For ratings of individual members of a series, see device ratings and specifications table.
Continuous
MLN Series
Units
5.5 - 18
V
Steady State Applied Voltage:
DC Voltage Range (VM(DC))
Operating Ambient Temperature Range (TA)
-55 to +125
ºC
Storage Temperature Range (TSTG)
-55 to +150
ºC
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLN.html for current information.
45
Revision: November 5, 2009
MLN SurgeArray™ Suppressor
MLN Series
The MLN SurgeArray™ Suppressor is designed to
help protect components from transient voltages that
exist at the circuit board level. This device provides four
independent suppressors in a single leadless chip in order
to reduce part count and placement time as well as save
space on printed circuit boards.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLN Series
Device Ratings and Specifications Any Single Section
Maximum Ratings (125ºC)
Maximum
Maximum
Maximum
Maximum
NonNonClamping
Continuous
repetitive
repetitive
Voltage (at
Working
Surge Current Surge Energy Noted 8/20μs)
Voltage
(8/20μs)
(10/1000μs)
Current
Part Number
VM(DC)
I TM
WTM
Specifications (25ºC)
Typical ESD
Supression Voltage
(Note1)
Nominal Voltage
at 1mA DC Test
Current
(Note 2)
(Note 3)
8kV Contact 15kV Air VN(DC)
Min
Peak Clamp Peak
VC
Capacitance
at 1 MHz
(1V p-p)
(Note 4)
C
TYP
MAX
VN(DC)
Max
(V)
(A)
(J)
(V)
(V)
(V)
(V)
(V)
(V)
(pF)
(pF)
5.5
30
0.10
15.5 at 2A
60
35
45
7.10
10.8
430
520
V9MLN41206
9.0
30
0.10
23.0 at 2A
95
50
75
11.0
16.0
250
300
V14MLN41206
14.0
30
0.10
30.0 at 2A
110
55
85
15.9
20.3
140
175
V5.5MLN41206
V18MLN41206
18.0
30
0.10
40.0 at 2A
165
63
100
22.0
28.0
100
125
V18MLN41206L
18.0
30
0.05
50.0 at 1A
200
95
130
25.0
35.0
45
75
NOTES:
1. Tested to IEC61000-4-2 Human Body Model (HBM) discharge test circuit.
2. Direct discharge to device terminals (IEC preffered test method).
3. Corona discharge through air (represents actual ESD event)
4. Capacitance may be customized, contact Sales.
Peak Current and Energy Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
PERCENT OF PEAK VALUE
For applications exceeding 125ºC ambient temperature, the
peak surge current and energy ratings must be reduced.
PERCENT OF RATED VALUE
100
90
80
70
60
50
40
100
90
50
10
O1
t
t1
30
TIME
t2
Figure 2
20
10
0
-55
50
60
70
80
90
100
110
120
Figure 1
Example:
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
(Impulse Duration)
130 140 150
AMBIENT TEMPERATURE ( oC)
For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Virtual Time
to Half Value
Typical Performance Curves
Impedance vs Frequency, 1206 Size
Equivalent Series Resistance
10000
1000
1000
Impeance |Z| (Ω)
OHMS
100
10
1
100
V5.5
V9
10
V14
V18
V18L
0.1
1MHz
10MHz
100MHz
1GHz
1
10GHz
Frequency
Figure 3
0.1
0.1
Figure 4
MLN SurgeArray™ Suppressor
46
Revision: November 5, 2009
1
10
100
1000
Frequency (MHz)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLN.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLN Series
Typical Performance Curves (continued)
Nominal Voltage Stability to IEC 1000-4-2 (8kV Contact
Method, One Section)
1206 Size Pulse Rating for Long Duration Surges
(Any Single Section)
100
25
V18
NUMBER OF SURGES
1
100
V14
15
2
Surge Current (A)
NOMINAL VOLTAGE
VNOM (V)
20
V9
10
V5.5
10
103
10
1
5
∞
104
106
0
10
Figure 5
100
1000
10000
0.1
10
NUMBER OF DISCHARGES
100
Figure 6
V-I Characteristic, 1206 size
1000
10000
Square Wave Impulse Duration (μs)
Capacitance vs Frequency, 1206 Size
500
100
V18L
MAXIMUM CLAMP VOLTAGE
V5.5
V18
MAXIMUM STANDBY
400
V14
V5.5
Capacitance (pF)
Varistor Voltage (V)
V9
V18L
V18
V14
10
V9
300
V9
200
V5.5
V14
V18
100
V18L
1
10μA
100μA
1mA
10mA
100mA
1A
10A
100A
0
0.1
Current (A)
Figure 7
Figure 8
1
10
100
1000
Frequency (MHz)
Adjacent Channel Crosstalk
0
Crosstalk (dB)
-20
-40
-60
V18L
V14
V18
V9
-80
V5.5
VIN = 1VRMS
Z = 50Ω
-100
-120
0.001
Figure 9
0.01
0.1
1
10
100
1000
Frequency (MHz)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLN.html for current information.
47
Revision: November 5, 2009
MLN SurgeArray™ Suppressor
MLN Series
105
0
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLN Series
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
components in surface mount technology are IR Re-flow
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
250
The recommended solder for the MLN suppressor is
a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb).
Littelfuse also recommends an RMA solder flux.
MAXIMUM TEMPERATURE
230°C
TEMPERATURE °C
200
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
40-80
SECONDS
ABOVE 183°C
150
RAMP RATE
<2°C/s
100
PREHEAT DWELL
50
PREHEAT ZONE
0
When using a reflow process, care should be taken to
ensure that the MLN chip is not subjected to a thermal
gradient steeper than 4 degrees per second; the ideal
gradient being 2 degrees per second. During the soldering
process, preheating to within 100 degrees of the solder's
peak temperature is essential to minimize thermal shock.
0
0.5
1.0
1.5
Figure 10
2.0
2.5
3.0
3.5
4.0
TIME (MINUTES)
Wave Solder Profile
300
Once the soldering process has been completed, it is
still necessary to ensure that any further thermal shocks
are avoided. One possible cause of thermal shock is hot
printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room
temperature. The boards must be allowed to cool gradually
to less than 50ºC before cleaning.
MAXIMUM WAVE 260°C
TEMPERATURE °C
250
200
150
SECOND PREHEAT
100
FIRST PREHEAT
50
Figure 11
MLN SurgeArray™ Suppressor
48
Revision: November 5, 2009
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
TIME (MINUTES)
3.5
4.0
4.5
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLN.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLN Series
Product Dimensions (mm)
PAD LAYOUT DEMENSIONS
CHIP LAYOUT DIMENSIONS
W
T
E
D
X
A
P
B
L
C
BW
S
MLN Series
BL
1206 Size
Dimension
IN
MM
A
0.890
0.035
B
1.650
0.065
C
2.540
0.100
D
0.460
0.018
E
0.790
0.030
L
0.126 -/+0.008
3.200 -/+0.200
W
0.063 -/+0.008
1.600 -/+0.200
T
0.053 Max
1.350 Max
BW
0.016 -/+0.004
0.410 -/+0.100
BL
0.007 +0.01/- 0.002
0.180 +0.25/-0.050
P
0.030 Ref
0.760 Ref
X
0.045 -/+0.004
1.400 -/+0.100
S
0.015 -/+0.004
0.380 -/+0.100
Part Numbering System
V 18 ML N 4 1206 W T
DEVICE FAMILY
TVSS Device
PACKING OPTIONS*
A: Bulk Pack, 2500 pieces
H: 7in (178mm) Diameter Reel, 2500 pieces
T: 13in (330mm) Diameter Reel, 10,000 pieces
END TERMINATION
W: Ag/Pd/Pt (Silver/Platinum/Palladium)
MAXIMUM DC
WORKING VOLTAGE
MULTILAYER DESIGNATOR
SERIES DESIGNATOR
N: Array
DEVICE SIZE:
1206: 120mil x 60mil
NUMBER OF SECTIONS
Packaging*
Quantity
Device Size
13” Inch Reel
("T" Option)
7” Inch Reel
("H" Option)
Bulk Pack
("A" Option)
1206
10,000
2,500
2,500
*(Packaging) It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLN.html for current information.
49
Revision: November 5, 2009
MLN SurgeArray™ Suppressor
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > MLN Series
Tape and Reel Specifications
t1
D0
P0
PRODUCT
IDENTIFYING
LABEL
P2
PLASTIC CARRIER TAPE
E
F
K0
W
B0
t2
D1
P1
Symbol
EMBOSSMENT
TOP TAPE
A0
Description
8mm
NOMINAL
178mm
OR 330mm
DIA. REEL
Dimensions in Millimeters
A0
Width of Cavity
Dependent on Chip Size to Minimize Rotation.
B0
Length of Cavity
Dependent on Chip Size to Minimize Rotation.
K0
Depth of Cavity
Dependent on Chip Size to Minimize Rotation.
W
Width of Tape
F
Distance Between Drive Hole Centers and Cavity Centers
3.5 -/+0.5
1.75 -/+0.1
8 -/+0.2
E
Distance Between Drive Hole Centers and Tape Edge
P1
Distance Between Cavity Center
4 -/+0.1
P2
Axial Distance Between Drive Hole Centers and Cavity Centers
2 -/+0.1
P0
Axial Distance Between Drive Hole Centers
4 -/+0.1
D0
Drive Hole Diameter
1.55 -/+0.05
D1
Diameter of Cavity Piercing
1.05 -/+0.05
T1
Embossed Tape Thickness
0.3 Max
T2
Top Tape Thickness
0.1 Max
Notes :
• Conforms to EIA-481-1, Revision A
• Can be supplied to IEC publication 286-3
MLN SurgeArray™ Suppressor
50
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/MLN.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
RoHS
AUML Varistor Series
The AUML Series of Multilayer Transient Surge Suppressors
was specifically designed to suppress the destructive
transient voltages found in an automobile. The most common
transient condition results from large inductive energy
discharges. The electronic systems in the automobile, e.g.
antilock brake systems, direct ignition systems, engine
control, airbag control systems, wiper motor controls, etc.,
are susceptible to damage from these voltage transients and
thus require protection. The AUML transient suppressors
have temperature independent suppression characteristics
affording protection from -55ºC to 125ºC.
The AUML suppressor is manufactured from semiconducting
ceramics which offer rugged protection and excellent
transient energy absorption in a small package. The devices
are available in ceramic leadless chip form, eliminating lead
inductance and assuring fast speed of response to transient
surges. These Suppressors require significantly smaller
space and land pads than Silicon TVS diodes, offering greater
circuit board layout flexibility for the designer.
Size Table
Metric
EIA
3216
1206
3225
1210
4532
1812
5650
2220
Also see the Littelfuse ML, MLN and MLE Series of
Multilayer Suppressors.
Applications
•
•
Features
Suppression of
inductive switching
or other transient
events such as EFT
and surge voltage at
the circuit board level
ESD protection for
components sensitive
to IEC 61000-4-2, MILSTD-883C, Method
3015.7, and other
industry specifications
(See Also the MLE
or MLN Series)
•
•
•
Provides on-board
transient voltage
protection for ICs
and transistors
Used to help achieve
electromagnetic
compliance of
end products
Replace larger surface
mount TVS Zeners in
many applications
•
AEC - Q200 compliant
•
High peak surge
current capability
•
RoHS Compliant
•
Load Dump energy
rated per SAE
Specification J1113
•
Leadless, surface
mount chip form
Low Profile, compact
industry standard
chip size; (1206, 1210,
1812 and 2220 Sizes)
•
•
•
“Zero” Lead
Inductance
Inherent bidirectional
clamping
•
•
Variety of energy
ratings available
No Plastic or epoxy
packaging assures
better than 94V-0
flammability rating
•
No temperature
derating up to
125ºC ambient
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart.
Continuous
AUML Series
Units
18
V
1.5 to 25
24.5
-55 to +125
-55 to +150
<0.01
J
V
O
C
O
C
%/OC
Steady State Applied Voltage:
DC Voltage Range (VM(DC))
Transient:
Load Dump Energy, (WLD)
Jump Start Capability (5 minutes), (VJUMP)
Operating Ambient Temperature Range (TA)
Storage Temperature Range (TSTG)
Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any
other conditions above those indicated in the operational sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
51
Revision: November 5, 2009
AUML Varistor Series
AUML Series
Description
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Device Ratings and Specifications
Maximum Ratings (125ºC)
Maximum
Jump Start Load Dump
Continuous
Voltage
Energy
DC Voltage
(5 Min)
(10 Pulses)
VM(DC)
VJUMP
WLD
Part Number
(V)
(V)
V18AUMLA1206
18
V18AUMLA1210
18
V18AUMLA1812
V18AUMLA2220
Specifications (25ºC)
Nominal Varistor Voltage
Maximum
at 10mA
Standby Leakage
DC Test Current
(at 13V DC)
VN(DC) Min
VN(DC) Max
IL
Maximum Clamping
Voltage (VC) at
Test Current (8/20μs)
VC
IP
(J)
(V)
(V)
(μA)
(V)
(A)
24.5
1.5
23
32
50
40
1.5
24.5
3.0
23
32
50
40
1.5
18
24.5
6.0
23
32
100
40
5.0
18
24.5
25
23
32
200
40
10.0
For automotive 24V and 42V applications please contact your Littelfuse representative or visit www.littelfuse.com for the latest product
update.
NOTES:
1. Average power dissipation of transients not to exceed 0.1W, 0.15W, 0.3W and 1W for model sizes 1206, 1210, 1812 and 2220 respectively.
2. Load Dump energy rating (into the suppressor) of a voltage transient with a resultant time constant of 115ms to 230ms.
3. Thermal shock capability per Mil-Std-750, Method 1051: -55ºC to 125ºC, 5 minutes at 25ºC, 25 Cycles: 15 minutes at each extreme.
4. For application specific requirements, please contact Littelfuse.
Current, Energy and Power Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
100
50
0
T
O1
90
PERCENT OF RATED VALUE
100
PERCENT OF PEAK VALUE
When transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown on the
Device Ratings and Characteristics Table for the specific
device. Certain parameter ratings must be derated at high
temperatures as shown below.
TIME
T1
80
T2
Figure 2
70
60
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
50
40
30
20
10
0
-55
50
60
70
80
90
100 110
120
130
140 150
AMBIENT TEMPERATURE (oC)
Figure 1
Maximum Leakage Current/Clamping Voltage Curve for
AUML Series at 25ºC
MAXIMUM LEAKAGE
Typical V-I Characteristics of the V18AUMLA2220 at -40ºC,
25ºC, 85ºC and 125ºC
100
MAXIMUM CLAMPING VOLTAGE
100
1210/1206
1812
VOLTAGE
2220
VOLTAGE
1210/1206
10
1812
-40oC
10
25oC
2220
85oC
125 oC
1
1
1μA
10μA
Figure 3
AUML Varistor Series
100μA
1mA
100mA
10mA
CURRENT
1A
10A
100A
10μA
100μA
1mA
10mA
100mA
1A
10A
100A
1000A
CURRENT
Figure 4
52
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Temperature Effects
the 10mA range), the AUML suppressor approaches
a 1-10 characteristic. In this region the characteristics
of the AUML are virtually temperature independent.
Figure 3 shows the typical effect of temperature on
the V-I characteristics of the AUML suppressor.
In the leakage region of the AUML suppressor, the device
characteristics approaches a linear (ohmic) relationship
and shows a temperature dependent affect. In this region
the suppressor is in a high resistance mode (approaching
106Ω) and appears as a near open-circuit. Leakage currents
at maximum rated voltage are in the microamp range.
When clamping transients at higher currents (at and above
A Load Dump transient occurs when the alternator load in
the automobile is abruptly reduced. The worst case scenario
of this transient occurs when the battery is disconnected
while operating at full rated load. There are a number of
different Load Dump specifications in existence in the
automotive industry, with the most common one being that
recommended by the Society of Automotive Engineers,
specification #SAE J1113. Because of the diversity of these
Load Dump specifications Littelfuse defines the Load
Dump energy capability of the AUML suppressor range as
that energy dissipated by the device itself, independent
of the test circuit setup. The resultant Load Dump energy
handling capability serves as an excellent figure of merit for
the AUML suppressor. Standard Load Dump specifications
require a device capability of 10 pulses at rated energy,
across a temperature range of -40ºC to +125ºC. This
capability requirement is well within the ratings of all of the
AUML Series (Figure 6 on next page).
The very high energy absorption capability of the AUML
suppressor is achieved by means of a highly controlled
manufacturing process. This technology ensures that a
large volume of suppressor material, with an interdigitated
layer construction, is available for energy absorption in an
extremely small package. Unlike equivalent rated Silicon
TVS diodes, the entire AUML device volume is available to
dissipate the Load Dump energy.
Further testing on the AUML Series has concentrated
on extending the number of Load Dump pulses, at rated
energy, which are applied to the devices. The reliability
information thus generated gives an indication of the
inherent capability of these devices. As an example of
device durability the 1210 size has been subjected to over
2000 pulses at its rated energy of 3 joules (J); the 1812 size
has been pulsed over 1000 times at 6J and 2220 size has
been pulsed at its rated energy of 25J over 300 times. In
all cases there has been little or no change in the device
characteristics (Figure 7 on next page).
Experience has shown that while the effects of a load dump
tranient is of real concern, its frequency of occurrence is
much less than thoe of low energy inductive spikes. Such
low energy inductive spikes may be generated as a result
of motors switching on and off, from ESD occurrances, fuse
blowing, etc. It is essential that the suppression technology
selected also has the capability to suppress such transients.
Testing on the V18AUMLA2220 has shown that after being
subjected to a repetitive energy pulse of 2J, over 6000
times, no characteristic changes have occurred (Figure 8 on
next page).
Hence, the peak temperatures generated by the Load
Dump transient are significantly lower and evenly dissipated
throughout the complete device (Figure 5 below). This
even energy dissipation ensures that there are lower peak
temperatures generated at the P-N grain boundaries of the
AUML suppressor.
There are a number of different size devices available in the
AUML Series, each one with a load dump energy rating,
which is size dependent.
Speed of Response
The clamping action of the AUML suppressor depends
on a conduction mechanism similar to that of other
semiconductor devices (i.e. P-N Junctions). The apparent
slow response time often associated with transient
voltage suppressors (Zeners, MOVs) is often due to
parasitic inductance in the package and leads of the
device and less dependent of the basic material (Silicon,
ZNO). Thus, the single most critical element affecting the
response time of any suppressor is its lead induc-tance.
The AUML suppressor is a surface mount device, with no
leads or external packaging, and thus, it has virtually zero
inductance. The actual response time of a AUML surge
suppressor is in the 1 to 5 ns range, more than sufficient
for the transients which are likely to be encountered in an
automotive environment.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
Multilayer Internal Construction
Figure 5
53
Revision: November 5, 2009
AUML Varistor Series
AUML Series
Load Dump Energy Capability
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
AUML Load Dump Pulsing over a Temperature Range of
-55ºC to +125ºC
V(10mA)
35
2220 = 25J
1812 = 6J
1210 = 3J
30
VOLTAGE
25
20
15
10
5
0
0
1
2
3
4
5
6
7
8
9
10
11
12
# OF LOAD DUMPS
Figure 6
Repetitive Load Dump Pulsing at Rated Energy
V(10mA)
35
2220 = 25J
1812 = 6J
30
1210 = 3J
VOLTAGE
25
20
15
10
5
0
0
50
100
150
200
250
300
350
1,000
2,000
# OF LOAD DUMPS
Figure 7
Repetitive Energy Testing of V18AUMLA2220
at an Energy Level of 2 Joules
V AT 10mA
VOLTAGE
100
V18AUMLA2220
10
1000
Figure 8
AUML Varistor Series
2000
3000
4000
5000
6000
7000
NUMBER OF PULSES
54
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
components in surface mount technology are IR Re-flow
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
The termination option available for each solder technique is:
230
Reflow
1. Nickel Barrier (preferred)
2. Silver/Platinum
Wave
1. Nickel Barrier (preferred)
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
AUML Series
The recommended solder for the AUML suppressor is
a 62/36/2 (Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb).
Littelfuse also recommends an RMA solder flux.
Figure 9
Wave Solder Profile
When using a reflow process, care should be taken to
ensure that the AUML chip is not subjected to a thermal
gradient steeper than 4 degrees per second; the ideal
gradient being 2 degrees per second. During the soldering
process, preheating to within 100 degrees of the solder's
peak temperature is essential to minimize thermal shock.
300
MAXIMUM WAVE 260 oC
TEMPERATURE ( oC)
250
Once the soldering process has been completed, it
is still necessary to ensure that any further thermal
shocks are avoided. One possible cause of thermal
shock is hot printed circuit boards being removed from
the solder process and subjected to cleaning solvents
at room temperature. The boards must be allowed to
cool gradually to less than 50ºC before cleaning.
200
150
SECOND PREHEAT
100
FIRST PREHEAT
50
0
0.0
Figure 10
0.5
1.0
1.5
2.0
2.5
3.0
TIME (MINUTES)
3.5
4.0
4.5
Lead–free (Pb-free) Soldering Recommendations
Littelfuse offers the Nickel Barrier Termination finish for the
optimum Lead–free solder performance.
Lead–free Re-flow Solder Profile
The preferred solder is 96.5/3.0/0.5 (SnAgCu) with an RMA
flux, but there is a wide selection of pastes and fluxes
available with which the Nickel Barrier parts should be
compatible.
MAXIMUM TEMPERATURE 260˚C
20 - 40 SECONDS WITHIN 5˚C
RAMP RATE
<3˚C/s
The reflow profile must be constrained by the maximums
in the Lead–free Reflow Profile. For Lead–free Wave
soldering, the Wave Solder Profile still applies.
PREHEAT ZONE
Note: the Lead–free paste, flux and profile were used for
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
three available, it is advised that the customer explores the
optimum combination for their process as processes vary
considerably from site to site.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
60 - 150 SEC
> 217˚C
5.0
6.0
7.0
Figure 11
55
Revision: November 5, 2009
AUML Varistor Series
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Product Dimensions (mm)
PAD LAYOUT DIMENSIONS
CHIP LAYOUT DIMENSIONS
E
L
D
W
Note: Avoid metal runs in this area, parts are not recommended
for use in applications using Silver (Ag) epoxy paste.
1206 Size
SYMBOL
A
1210 Size
1812 Size
2220 Size
IN
MM
IN
MM
IN
MM
IN
MM
0.203
5.150
0.219
5.510
0.272
6.910
0.315
8.000
B
0.103
2.620
0.147
3.730
0.172
4.360
0.240
6.190
C
0.065
1.650
0.073
1.850
0.073
1.850
0.073
1.850
D (max.)
0.071
1.80
0.070
1.80
0.07
0.118
3.00
E
0.020 -/+ 0.010
0.50 -/+0.25
0.030 -/+ 0.010
0.75 -/+ 0.25
L
0.125 -/+ 0.012 3.20 -/+ 0.03
0.125 -/+ 0.012
3.20 -/+ 0.30
0.180 -/+ 0.014
0.225 -/+ 0.016
5.70 -/+ 0.40
W
0.060 -/+ 0.011
0.100 -/+ 0.012
2.54 -/+ 0.30
0.125 -/+ 0.012
1.80
0.50 -/+
0.25
4.50 -/+
0.35
3.20 -/+
0.30
0.197 -/+ 0.016
5.00 -/+ 0.40
1.60 -/+ 0.28
0.020 -/+ 0.010 0.50 -/+ 0.25 0.020 -/+ 0.010
the AUML suppressor range as that energy dissipated by
the device itself, independent of the test circuit setup.
The resultant Load Dump energy handling capability
serves as an excellent figure of merit for the AUML
suppressor. Standard Load Dump specifications require
a device capability of 10 pulses at rated energy, across
a temperature range of -40ºC to +125ºC. This capability
requirement is well within the ratings of all of the AUML
Series (Figure 5).
A Load Dump transient occurs when the alternator load
in the automobile is abruptly reduced. The worst case
scenario of this transient occurs when the battery is
disconnected while operating at full rated load. There
are a number of different Load Dump specifications in
existence in the automotive industry, with the most
common one being that recommended by the Society of
Automotive Engineers, specification #SAE J1113. Because
of the diversity of these Load Dump specifications
Littelfuse defines the Load Dump energy capability of
Explanation of Terms
Maximum Continuous DC Working Voltage (*VM*(DC)++)
Leakage Current *IL+
This is the maximum continuous DC voltage which may
be applied, up to the maximum operating temperature
(125ºC), to the ML suppressor. This voltage is used as the
reference test point for leakage current and is always less
than the breakdown voltage of the device.
In the nonconducting mode, the device is at a very
high impedance (approaching 106Ω at its rated working
voltage) and appears as an almost open circuit in the
system. The leakage current drawn at this level is very
low (<25μA at ambient temperature) and, unlike the
Zener diode, the multilayer TVS has the added advantage
that, when operated up to its maximum temperature,
its leakage current will not increase above 500μA.
Load Dump Energy Rating *WLD+
This is the actual energy the part is rated to dissipate
under Load Dump conditions (not to be confused with the
"source energy" of a Load Dump test specification).
Nominal Voltage *VN*DC++
This is the voltage at which the AUML enters its
conduction state and begins to suppress transients.
In the automotive environment this voltage is
defined at the 10mA point and has a minimum
(VN(DC) MIN) and maximum (VN(DC) MAX) voltage specified.
Maximum Clamping Voltage *VC+
This is the peak voltage appearing across the suppressor
when measured at conditions of specified pulse current
and specified waveform (8/20μs). It is important to note
that the peak current and peak voltage may not necessarily
be coincidental in time.
AUML Varistor Series
56
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Part Numbering System
V 18 AUML A 2220 X X
PACKING OPTIONS
A: Bulk Pack, 2500 pieces
H: 7in (178mm) Diameter Reel*
T: 13in (330mm) Diameter Reel*
* See quanttities in Packaging table below
DEVICE FAMILY
TVSS Device
MAXIMUM DC
WORKING VOLTAGE
END TERMINATION OPTION
No Letter: Ag/Pt 2220 size only
N: Nickel Barrier
AUTOMOTIVE
MULTILAYER DESIGNATOR
LOAD DUMP ENERGY RATING
INDICATOR
AUML Series
DEVICE SIZE
i.e., 220 mil x 200 mil
Packaging*
Quantity
Device Size
13” Inch Reel
('T' Option)
7” Inch Reel
('H' Option)
Bulk Pack
('A' Option)
1206
1210
1812
2220
10,000
8,000
4,000
4,000
2,500
2,000
1,000
1,000
2,500
2,000
1,000
1,000
*(Packaging) It is recommended that parts be kept in the sealed bag provided and that parts be used as soon as possible when removed from bags.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
57
Revision: November 5, 2009
AUML Varistor Series
Varistor Products
Surface Mount Multilayer Varistors (MLVs) > AUML Series
Tape and Reel Specifications
Symbol
Description
Dimensions in Millimeters
A0
Width of Cavity
B0
Length of Cavity
Dependent on Chip Size to Minimize Rotation.
K0
Depth of Cavity
Dependent on Chip Size to Minimize Rotation.
W
Width of Tape
8 -/+ 0.2
12 -/+ 0.2
F
Distance Between Drive Hole Centers and Cavity Centers
3.5 -/+ 0.5
5.4 -/+ 0.5
1.75 -/+ 0.1
1.75 -/+ 0.1
Dependent on Chip Size to Minimize Rotation.
E
Distance Between Drive Hole Centers and Tape Edge
P1
Distance Between Cavity Center
4 -/+ 0.1
8-/+ 0.1
P2
Axial Distance Between Drive Hole Centers and Cavity Centers
2 -/+ 0.1
2 -/+ 0.1
P0
Axial Distance Between Drive Hole Centers
8 -/+ 0.1
8 -/+ 0.1
D0
Drive Hole Diameter
1.55 -/+ 0.05
1.55 -/+ 0.05
D1
Diameter of Cavity Piercing
1.05 -/+ 0.05
1.55 -/+ 0.05
T1
Embossed Tape Thickness
0.3 Max
0.4 Max
T2
Top Tape Thickness
0.1 Max
0.1 Max
NOTE: Dimensions in millimeters.
• Conforms to EIA-481-1, Revision A
• Can be supplied to IEC publication 286-3
Tape
Chip Size
8mm Wide Tape
1206
1210
12mm Wide Tape
1812
2220
Standard Packaging
Special Packaging
Tape and reel is the standard packaging method of the
AUML Series. The standard 300 millimeter (13–inch) reel
utilized contains 4000 pieces for the 2200 and 1812 chips,
8000 pieces for the 1210 chip and 10,000 pieces for the
1206 size.
Option1:
178 millimeter (7–inch) reels containing 1000
(2220, 1812), 2000 (1210), 2500 (1206), pieces
are available. To order add 'H' to the standard
part number, e.g. V18AUMLA2220H.
Option 2
For small sample quantities (less than 100
pieces) the units are shipped bulk pack. To
order add 'A' to the standard part number,
e.g. V18AUMLA2220A.
To order: add 'T' to the standard part number,
e.g.V18AUMLA222OT.
AUML Varistor Series
58
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/AUML.html for current information.
Varistor Products
Surface Mount Varistors > CH Series
RoHS
CH Varistor Series
Description
CH Series varistors are available in a voltage range from
14V to 275V (VM(AC)RMS), and energy ratings up to 8J.
See the Littelfuse Multilayer Suppressor Series also.
Agency Approvals
Features
Recognized under the components program of
Underwriters Laboratories.
AGENCY
AGENCY FILE NUMBER
•
Lead–free
•
•
Leadless, surface
mount chip in 5
x 8mm Size
Supplied in tape and
reel or bulk pack
•
No derating up to
125ºC ambient
UL E320116
•
Voltage ratings
VM(AC)RMS 14V to 275V
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
CH Series
Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
14 to 275
V
DC Voltage Range (VM(DC))
18 to 369
V
100 to 250
A
Transient:
Peak Pulse Current (ITM)
For 8/20μs Current (See Figure 2)
Single Pulse Energy Range
1.0 to 8.0
J
Operating Ambient Temperature Range (TA)
For 10/1000μs Current Wave (WTM)
-55 to +125
ºC
Storage Temperature Range (TSTG)
-55 to +150
ºC
<0.01
%/ºC
Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation of
the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
59
Revision: November 5, 2009
CH Varistor Series
CH Series
CH Series transient surge suppressors are small,
metal-oxide varistors (MOVs) manufactured in leadless
chip form. They are intended for use in a variety of
applications from low voltage DC to off-line board-level
protection. These devices, which have significantly
lower profiles than traditional radial lead varistors,
permit designers to reduce the size and weight and
increase the reliability of their equipment designs.
Varistor Products
Surface Mount Varistors > CH Series
Device Ratings and Specifications
Maximum Ratings (125ºC)
Continuous
Part
Number
Specifications (25ºC)
Varistor Voltage at 1 mA DC Max Clamping Volt VC at
Test Current (8/20μs)
Test Current
Transient
Typical
Capacitance
VRMS
VDC
VM(AC)
VM(DC)
Energy
(10/1000μ s)
WTM
Peak Current
(8/20μs)
ITM
(V)
(V)
(J)
MIN
VN(DC)
MAX
VC
IP
f=1MHz
(A)
(V)
(V)
(V)
(V)
(A)
(pF)
V22CH8
14
18 (Note 3)
1.0 (Note2)
100
18.7
22.0
26.0
47
5
1600
V27CH8
17
22
1.0
100
23.0
27.0
31.1
57
5
1300
V33CH8
20
26
1.0
100
29.5
33.0
36.5
68
5
1100
V39CH8
25
31
1.0
100
35.0
39.0
43.0
79
5
900
V47CH8
30
38
1.2
100
42.0
47.0
52.0
92
5
800
V56CH8
35
45
1.4
100
50.0
56.0
62.0
107
5
700
V68CH8
40
56
1.5
100
61.0
68.0
75.0
127
10
600
V120CH8
75
102
2.0
250
108.0
120.0
132.0
200
10
300
V150CH8
95
127
3.0
250
135.0
150.0
165.0
250
10
250
V180CH8
115
153
4.0
250
162.0
180.0
198.0
295
10
200
V200CH8
130
175
4.0
250
184.0
200.0
228.0
340
10
180
V220CH8
140
180
5.0
250
198.0
220.0
242.0
360
10
160
V240CH8
150
200
5.0
250
212.0
240.0
268.0
395
10
150
V360CH8
230
300
6.0
250
324.0
360.0
396.0
595
10
100
V390CH8
250
330
7.0
250
354.0
390.0
429.0
650
10
90
V430CH8
275
369
8.0
250
389.0
430.0
473.0
710
10
80
NOTES:
1. Power dissipation of transients not to exceed 0.25W.
2. Energy rating for impulse duration of 30ms minimum to one half of peak current value.
3. Also rated to withstand 24V for 5 minutes.
4. All Littelfuse CH Series Varistors are recognized under UL file #E320116 as a recognized component.
Current, Energy and Power Derating Curve
Continuous power dissipation capability is not an applicable
design requirement for a suppressor, unless transients
occur in rapid succession. Under this condition, the
average power dissipation required is simply the energy
(watt-seconds) per pulse times the number of pulses
per second. The power so developed must be within
the specifications shown on the Device Ratings and
Specifications Table for the specific device. Furthermore,
the operating values need to be derated at high tempera
tures as shown in this diagram. Because varistors can only
dissipate a relatively small amount of average power they
are, therefore, not suitable for repetitive applications that
involve substantial amounts of average power dissipation.
CH Varistor Series
PERCENT OF RATED VALUE
100
90
80
70
60
50
40
30
20
10
0
-55
Figure 1
60
Revision: November 5, 2009
50
60
70
80
90
100
110
120
130
140
150
AMBIENT TEMPERATURE ( oC)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
Varistor Products
Surface Mount Varistors > CH Series
PERCENT OF PEAK VALUE
Peak Pulse Current Test Waveform
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example:
For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
100
90
50
10
O1
T
TIME
T1
Figure 2
Clamping Voltage for V22CH8 – V68CH8
Clamping Voltage for V120CH8 – V430CH8
4,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
22 TO 56VN(DC) RATING
TA = -55oC TO 125 oC
200
100
90
80
70
60
50
40
V68CH8
V56CH8
V47CH8
V39CH8
V33CH8
V27CH8
V22CH8
30
20
10
10 -3
10 -2
10 -1
Figure 3
10 0
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
100 TO 430VN(DC) RATING
TA = -55oC TO 125 oC
3,000
MAXIMUM PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
500
400
300
10 1
CH Series
T2
10 2
2,000
1,000
900
800
700
600
500
400
V240CH8
V220CH8
V200CH8
300
200 V180CH8
V150CH8
V120CH8
100
10 -3
10 3
10 -2
10 -1
Figure 4
PEAK AMPERES (A)
V430CH8
V390CH8
V360CH8
10 0
10 1
10 2
PEAK AMPERES (A)
10 3
10 4
Pulse Rating Curves
Surge Current Rating Curves for V120CH8 - V430CH8
Surge Current Rating Curves for V22CH8 - V56CH8
2,000
500
200
2
100
10
50
10 2
MODEL SIZE 5 x 8mm
V22CH8 - V56CH8
20
10
5
INDEFINITE
0.5
Figure 5
10 2
10 3
10 4
10 5
2
200
10
100
50
20
10 6
10
5
1
0.2
20
1
500
10 4
10 5
10 6
10 3
2
MODEL SIZE 5 x 8mm
V120CH8 - V430CH8
1,000
SURGE CURRENT (A)
SURGE CURRENT (A)
1
INDEFINITE
2
1
100
1,000
IMPULSE DURATION (μs)
20
10,000
Figure 6
100
1,000
10,000
IMPULSE DURATION (μs)
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than +/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may result in
the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
61
Revision: November 5, 2009
CH Varistor Series
Varistor Products
Surface Mount Varistors > CH Series
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
components in surface mount technology are IR Re-flow
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
250
The terminals of CH series devices are Platinum plated
Silver (Ag/Pt), and the recommended solder is 62/36/2
(Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also
recommends an RMA solder flux.
MAXIMUM TEMPERATURE
230°C
TEMPERATURE °C
200
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
40-80
SECONDS
ABOVE 183°C
150
RAMP RATE
<2°C/s
100
PREHEAT DWELL
50
PREHEAT ZONE
0
When using a reflow process, care should be taken to
ensure that the CH chip is not subjected to a thermal
gradient steeper than 4 degrees per second; the ideal
gradient being 2 degrees per second. During the soldering
process, preheating to within 100 degrees of the solder's
peak temperature is essential to minimize thermal shock.
0
0.5
1.0
1.5
Figure 7
2.0
2.5
3.0
3.5
4.0
TIME (MINUTES)
Wave Solder Profile
300
Once the soldering process has been completed, it is
still necessary to ensure that any further thermal shocks
are avoided. One possible cause of thermal shock is hot
printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room
temperature. The boards must be allowed to cool gradually
to less than 50ºC before cleaning.
MAXIMUM WAVE 260°C
TEMPERATURE °C
250
200
150
SECOND PREHEAT
100
FIRST PREHEAT
50
0
0.0
0.5
1.0
1.5
Figure 8
2.0
2.5
3.0
TIME (MINUTES)
3.5
4.0
4.5
Lead–free (Pb-free) Soldering Recommendations
The terminals of CH series devices are Platinum plated
Silver (Ag/Pt), and the recommended Lead-free solder is
96.5/3.0/0.5 (SnAgCu) with an RMA flux, though there is a
wide selection of pastes and fluxes available that should be
compatible.
Lead–free Re-flow Solder Profile
300
MAXIMUM TEMPERATURE 250˚C,
TIME WITHIN 5˚C OF PEAK
20 SECONDS MAXIMUM
250
TEMPERATURE °C
The reflow profile must be constrained by the maximums
in the Lead–free Reflow Profile. For Lead–free Wave
soldering, the Wave Solder Profile still applies.
Note: the Lead–free paste, flux and profile were used for
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
three available, it is advised that the customer explores the
optimum combination for their process as processes vary
considerably from site to site.
CH Varistor Series
RAMP RATE
<3˚C/s
200
60 - 150 SEC
> 217˚C
150
100
PREHEAT ZONE
50
0
Figure 9
62
Revision: November 5, 2009
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
TIME (MINUTES)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
Varistor Products
Surface Mount Varistors > CH Series
Part Numbering System
V 220 CH 8 X
PACKAGING OPTIONS
No Letter: Standard 13 Inch Reel
T: 7 Inch Reel
S: Bulk Pack
RELATIVE SIZE INDICATOR
LITTELFUSE VARISTOR
NOMINAL VARISTOR
VOLTAGE
SERIES DESIGNATOR
Dimensions
Symbol
C
NOTE 1
Inches
Min
A
B
A
Max
Millimeters
Min
CH Series
PAD LAYOUT DIMENSIONS
Max
0.402
10.210
B
0.216
5.500
C
0.087
2.210
D
-
0.080
-
2.03
E
0.016
0.050
0.41
1.27
L
0.311
0.335
7.90
8.51
W
0.185
0.207
4.70
5.26
NOTE: Avoid metal runs in this area. Soldering recommendations: Material - 62/36/2 Sn/Pb/
Ag or equivalent.Temperature – 230ºC Max., 5s. Max. Flux - R.M.A.
CHIP LAYOUT DIMENSIONS
E
L
D
W
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
63
Revision: November 5, 2009
CH Varistor Series
Varistor Products
Surface Mount Varistors > CH Series
Tape and Reel Specifications
Symbol
P0
E
W
P
P2
K0
D
F
SECTION
THRU
CAVITY
B0
A0
D1
T1
K
T
CROSS SECTION
(REF. PLANE FOR A 0 & B0)
H0 B0
R1
R2
K0
R3
A0
R4
MINIMUM
BENDING
RADIUS
REELED RADIUS DETAILS
CAVITY DETAILS
Size (mm)
Cavity Length
8.5 -/+ 0.1
A0
Cavity Width
5.5 -/+ 0.1
K0
Cavity Depth
2.0 Min.
H0
Ref. Plane for A0 and B0
R1, R2, R3
T
PLAN VIEW OF STRIP
Parameter
B0
Tape Cavity Radii
+ 0.10
0.3
- 0.05
0.5 Max.
T
Carrier Tape Thickness
1.0 Max.
T1
Cover Tape Thickness
0.1 Max.
E
Sprocket Hole from Edge
1.75 -/+ 0.1
P0
Sprocket Hole Pitch
4.0 -/+ 0.1
D
Sprocket Hole Diameter
P2
Hole Centre to Component Centre
+ 0.1
1.5
- 0.0
2.0 -/+ 0.15
R4
Min. Bending Radius
D1
Ejection Hole Diameter
30.5 Min.
1.5 Min.
K
Overall Thickness
3.0 Min.
P
Pitch Of Component
8.0 -/+ 0.1
F
Sprocket Hole to Ejection Hole
7.5 -/+ 0.1
W
Carrier Tape Width
16.0 -/+ 0.3
Notes :
• Conforms to EIA-481-1, Revision A
• Can be supplied to IEC P ublication 286-3
Standard Packaging*
Special Packaging
CH Series varistors are always shipped in tape and reel.
The standard 13-inch reel utilized contains 4000 pieces.
Option 1
Note also that the CH Series receives no branding on the
chip itself.
Option 2
*NOTE: It is recommended that parts be kept in the sealed
bag provided and that parts be used as soon as possible
when removed from bags.
CH Varistor Series
64
Revision: November 5, 2009
7-inch reels containing 1000 pieces are
available. To order 7-inch reels add a 'T' suffix to
the part number; e.g., V47CH8T.
For small quantities (less than 100 pieces) the
units are shipped bulk pack. To order, add a 'S'
suffix to the part number; e.g., V47CH8S.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/CH.html for current information.
Varistor Products
Surface Mount Varistors > SM7 Series
RoHS
SM7 Varistor Series
Description
The Littelfuse SM7 Series is a plastic-encapsulated
surface-mount metal oxide varistor (MOV) transient
voltage surge suppressor that is designed to be
operated continuously across AC power lines.
The series comprises a Nylon molded package with
tin plated lead frame for soldering to board. The
surface mount SM7 Series is based on radial 7mm
internal varistor element with similar characteristics
to the Littelfuse LA / ZA series of varistor.
Features
Agency
Agency File Number
E320116
• Electrical equivalent
to leaded types
LA/ZA series
•
Good solderability
•
Available in tape
and reel
•
AC Voltage Rating 275
V to 510VAC rms
•
Application of AC
power meters
•
No De-Rating up
to 85°C ambient
SM7 Series
Agency Approvals
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
LA Series
Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
275 to 510
V
DC Voltage Range (VM(DC))
369 to 675
V
1200
A
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range
For 10/1000μs Current Wave (WTM)
23 to 40
J
Operating Ambient Temperature Range (TA)
-40 to +85
O
Storage Temperature Range (TSTG)
-55 to +125
O
C
C
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
<0.01
%/OC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
2500
V
COATING Insulation Resistance
1000
MΩ
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/sm7.html for current information.
65
Revision: November 5, 2009
SM7 Series Varistor
Varistor Products
Surface Mount Varistors > SM7 Series
LA Series Ratings & Specifications
Maximum Rating (85°C)
Continuous
Transient
Part
Number
V275SM7 *
V300SM7
V320SM7
V385SM7
V420SM7
V460SM7
V480SM7
V510SM7
VRMS
VDC
VM(AC)
(V)
275
300
320
385
420
460
480
510
VM(DC)
(V)
369
405
420
505
560
615
640
675
Specifications (25°C)
Maximum
Clamping
Energy
Peak Current
Voltage
10 x 1000μs
8 x 20μs
8 x 20 μs
WTM
ITM
VNOM Min VNOM Max
VC
IPK
(J)
(A)
(V)
(V)
(V)
(A)
23
1200
389
473
710
10
25
1200
420
517
775
10
25
1200
462
565
850
10
27
1200
558
682
1025
10
30
1200
610
748
1120
10
37
1200
640
790
1190
10
35
1200
670
825
1240
10
40
1200
735
910
1200
10
Typical
Capacitance
f = 1MHz
Varistor Voltage
at 1mA DC
Test Current
C
(pF)
80
70
65
60
55
55
50
45
NOTE: V300-V510SM7 are recognized under UL file # E320116, agency certification in progress for V275SM7.
Peak Current, Energy and Power Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
PERCENT OF PEAK VALUE Test
For applications exceeding 85ºC ambient temperature, the peak
surge current and energy ratings must be reduced as shown below
PERCENT OF RATED VALUE
100
90
80
70
60
50
40
100
50
0
t
O1
TIM E
t1
30
20
t
10
0
-55
50
60
70
80
90
100
110
120
130
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
140 150
AMBIENT TEMPERATURE ( oC)
V-I Limit Curves
Pulse Rating Curves
2000
V510SM7
V480SM7
10000
V460SM7
1500
V385SM7
V300SM7
500
0
0.001
1
1000
V320SM7
1000
Surge Current (A)
Voltage(V)
V420SM7
2
104
10
105
2
100
10
103
106
10
0.01
0.1
1
10
100
1000
Current(A)
1
10
1000
10000
Impulse Duration (μs)
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
±10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not prevent
the device from continuing to function, and to provide ample protection.
SM7 Series Varistor
100
66
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/sm7.html for current information.
Varistor Products
Surface Mount Varistors > SM7 Series
Lead (Pb) Soldering Recommendations
The principal techniques used for the soldering of
components in surface mount technology are IR Re-flow
and Wave soldering. Typical profiles are shown on the right.
Reflow Solder Profile
250
The terminals of SM7 series devices are tin plated copper,
and the recommended solder is 62/36/2 (Sn/Pb/Ag), 60/40
(Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also recommends an
RMA solder flux.
MAXIMUM TEMPERATURE
230°C
TEMPERATURE °C
200
Wave soldering is the most strenuous of the processes.
To avoid the possibility of generating stresses due to
thermal shock, a preheat stage in the soldering process
is recommended, and the peak temperature of the solder
process should be rigidly controlled.
40-80
SECONDS
ABOVE 183°C
150
RAMP RATE
<2°C/s
100
PREHEAT DWELL
50
PREHEAT ZONE
0
When using a reflow process, care should be taken to
ensure that the SM7 chip is not subjected to a thermal
gradient steeper than 4 degrees per second; the ideal
gradient being 2 degrees per second. During the soldering
process, preheating to within 100 degrees of the solder's
peak temperature is essential to minimize thermal shock.
0
0.5
1.0
1.5
Figure 7
2.0
2.5
3.0
3.5
4.0
TIME (MINUTES)
Wave Solder Profile
300
Once the soldering process has been completed, it is
still necessary to ensure that any further thermal shocks
are avoided. One possible cause of thermal shock is hot
printed circuit boards being removed from the solder
process and subjected to cleaning solvents at room
temperature. The boards must be allowed to cool gradually
to less than 50ºC before cleaning.
MAXIMUM WAVE 260°C
200
SM7 Series
TEMPERATURE °C
250
150
SECOND PREHEAT
100
FIRST PREHEAT
50
0
0.0
0.5
1.0
1.5
Figure 8
2.0
2.5
3.0
TIME (MINUTES)
3.5
4.0
4.5
Lead–free (Pb-free) Soldering Recommendations
The terminals of SM7 series devices are tin plated copper,
and the recommended Lead-free solder is 96.5/3.0/0.5
(SnAgCu) with an RMA flux, though there is a wide
selection of pastes and fluxes available that should be
compatible.
Lead–free Re-flow Solder Profile
300
MAXIMUM TEMPERATURE 250˚C,
TIME WITHIN 5˚C OF PEAK
20 SECONDS MAXIMUM
250
TEMPERATURE °C
The reflow profile must be constrained by the maximums
in the Lead–free Reflow Profile. For Lead–free Wave
soldering, the Wave Solder Profile still applies.
Note: the Lead–free paste, flux and profile were used for
evaluation purposes by Littelfuse, based upon industry
standards and practices. There are multiple choices of all
three available, it is advised that the customer explores the
optimum combination for their process as processes vary
considerably from site to site.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/sm7.html for current information.
RAMP RATE
<3˚C/s
200
60 - 150 SEC
> 217˚C
150
100
PREHEAT ZONE
50
0
Figure 9
67
Revision: November 5, 2009
0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
TIME (MINUTES)
SM7 Series Varistor
Varistor Products
Surface Mount Varistors > SM7 Series
Part Numbering System
Product Dimensions
11.5±0.3
V 275 SM7
8.3±0.3
0.3 max
For “VARISTOR”
(Three digits -- 275V to 510V)
1.5±0.3
6.5
V M(AC)
6.0±0.3
SM7 SERIES
3.0±0.3
All dimensions shown
in milimeters
3.5
13.1
Soldering Pad Layout
Tape & Reel Specifications
mm
W
16.00±0.30
T
0.40±0.05
E
A0
11.80±0.10
F
Carrier Tape
B0
8.60±0.10
K0
6.80±0.10
E
1.75±0.10
P0
B
D1
B
3.60
W
A
B0
D0
A
5°
P1
P2
T
A0
11.30
10°
5°
6.2
K0
2
B-B
F
7.50±0.10
P0
4.00±0.10
P1
16.00±0.10
P2
2.00±0.10
D0
ø1.50 +0.10/-0
D1
ø1.50 +0.10/-0
NOTES:
1) All dimensions per EIA-481-c
2) 10 pitches cumulative tolerance on tape ±0.20mm
3) Quantity per 13 inch (330 mm) reel: 600 pcs
A-A
Plastic Reel
DETAIL H
Ø
2±0.5
Ø330
Ø100
.2
±0
13
±0.8
Ø21
R1
16.5
120°
DETAIL H
SM7 Series Varistor
21.5±0.4
68
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/sm7.html for current information.
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
RoHS
TMOV® and i TMOV® Varistor Series
Description
The Littelfuse TMOV® and iTMOV® thermally protected
varistors represent a new development in integrated
circuit protection. Both versions are comprised of radial
leaded MOVs (Metal Oxide Varistors) with an integrated
thermally activated element designed to open in the
event of overheating due to the abnormal overvoltage,
limited current, conditions outlined in UL1449. The TMOV®
and iTMOV® varistor’s integrated thermal element, in
conjunction with appropriate enclosure design, helps
facilitate TVSS module compliance to UL1449 for both cord
connected and permanently connected applications.
The TMOV® and iTMOV® varistors offer quick thermal
response due to the close proximity of the integrated
thermal element to the MOV body. The integrated
configuration also offers lower inductance than most
discrete solutions resulting in improved clamping
performance to fast overvoltage transients.
Additionally TMOV® and iTMOV® varistors are wave
solderable, thus simplifying end product assembly by
reducing the the expense and rework associated with hand
soldering operations.
Agency Approvals
Standard
UL1414
Agency File
Number
E56529
14mm
√
20mm
√
UL14494
E75961
√
√1
Agency Approval
√
2
RoHS and Lead–free
14mm
20mm
√
√
√
√
UL60691 (selected Tests)
E75961SP
N/A
N/A
No.3
22.2-1
LR91788
√
√
Pending
Pending
IEC - CECC Spec
QC42201-X0001
√
√3
√
√
IEC - CECC Spec
40021525
√
√
√
√
1. Devices with ratings greater than 420VAC are not affected by these abnormal voltage conditions.
2. Regarding thermal cut-offs for ratings up to 420VAC.
3. Under evaluation
4. 'Compliant to UL1449 2nd Edition. 3rd edition pending'.
Accelerated Age Testing: Devices comply with Accelerated aging test requirements per ANSI/IEEE C62.11 and may be used in secondary surge arresters without repeating this test.
Applications
•
•
TVSS Products
AC Panel Protection
Modules
•
AC Line Power Supplies
•
Surge Protected
Strip Connectors
Features
•
•
GFCI (Ground Fault
Current Interupter)
•
UPS (Uninterruptable
•
Power Supply)
•
White Goods
•
Plug-in TVSS
•
•
AC Power Meters
•
Inverters
•
Relocatable AC
Power Taps
•
AC/DC Power Supplies
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
•
69
Revision: November 5, 2009
•
Wave solderable
•
Patented integrated
thermal protection device
- Patent #US6636403
Standard lead form
and spacing option
•
Low leakage
Designed to facilitate
compliance to
UL1449 2nd Edition
for TVSS product
•
-55°C to +85°C
operating temp range
•
Three-lead version
available for indication
purposes
RoHS compliant and
Lead–free available
High peak surge current
rating up to 10kA
TMOV® and i TMOV® Varistor Series
TMOV®/iTMOV® Series
The iTMOV® varistor differs from the TMOV® varistor by the
inclusion of a third lead for the purpose of indicating that
the MOV has been disconnected from the circuit. This lead
facilitates connection to monitoring circuitry.
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
TMOV® and iTMOV®
Series
Units
115 to 750
V
6,000 to 10,000
A
35 to 480
-55 to +85
-55 to +125
<0.01
2,500
600
J
°C
°C
%/°C
V
V
COATING Insulation Resistance
1,000
MΩ
Indicator Lead Rating (Lead-3 - iTMOV® varistor only):
Continuous RMS current
Surge Current, 8/20μs
100
10,000
mA
A
Continuous
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
Transient:
Peak Pulse Current (ITM)
For 8x20μs Current Wave, single pulse
Single-Pulse Energy Capability
For 2ms Current Wave
Operating Ambient Temperature Range (TA)
Storage Temperature Range (TSTG)
Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Thermal Protection Isolation Voltage Capability (when operated)
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and
operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
TMOV® Ratings & Specifications
Continuous
Lead–free and RoHS
Compliant Models
Standard
Models
Disc
DiaMeter
Part
Number
Branding
Part
Number
Branding
TMOV14RP115E
TMOV20RP115E
TMOV14RP130E
TMOV20RP130E
TMOV14RP140E
TMOV20RP140E
TMOV14RP150E
TMOV20RP150E
TMOV14RP175E
TMOV20RP175E
TMOV14RP200E
TMOV20RP200E
TMOV14RP230E
TMOV20RP230E
TMOV14RP250E
TMOV20RP250E
TMOV14RP275E
TMOV20RP275E
TMOV14RP300E
TMOV20RP300E
TMOV14RP320E
TMOV20RP320E
TMOV14RP385E
TMOV20RP385E
TMOV14RP420E
TMOV20RP420E
TMOV20RP460E
P4T115E
P2T115E
P4T130E
P2T130E
P4T140E
P2T140E
P4T150E
P2T150E
P4T175E
P2T175E
P4T200E
P2T200E
P4T230E
P2T230E
P4T250E
P2T250E
P4T275E
P2T275E
P4T300E
P2T300E
P4T320E
P2T320E
P4T385E
P2T385E
P4T420E
P2T420E
P2T460E
TMOV14R115E
TMOV20R115E
TMOV14R130E
TMOV20R130E
TMOV14R140E
TMOV20R140E
TMOV14R150E
TMOV20R150E
TMOV14R175E
TMOV20R175E
TMOV14R200E
TMOV20R200E
TMOV14R230E
TMOV20R230E
TMOV14R250E
TMOV20R250E
TMOV14R275E
TMOV20R275E
TMOV14R300E
TMOV20R300E
TM0V14R320E
TMOV20R320E
TMOV14R385E
TMOV20R385E
TMOV14R420E
TMOV20R420E
TMOV20R460E
4T115E
20T115E
4T130E
20T130E
4T140E
20T140E
4T150E
20T150E
4T175E
20T175E
4T200E
20T200E
4T230E
20T230E
4T250E
20T250E
4T275E
20T275E
4T300E
20T300E
4T320E
20T320E
4T385E
20T385E
4T420E
20T420E
20T460E
TMOV® and i TMOV® Varistor Series
AC
Volts
VM(AC)RMS
(mm)
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
20
(V)
115
115
130
130
140
140
150
150
175
175
200
200
230
230
250
250
275
275
300
300
320
320
385
385
420
420
460
Maximum Rating (85°C)
Transient
Suppressed
Energy
Voltage
2ms
Rating
UL 1449
Table 60.1
(V)
300
300
400
400
500
400
500
400
700
700
700
700
700
700
800
700
900
700
900
900
900
900
1200
1200
1200
1200
n/a
70
Revision: November 5, 2009
WTM
(J)
35
52
50
100
55
110
60
120
70
135
75
154
80
160
100
170
110
190
125
250
136
372
150
300
160
320
360
Peak Surge
Current 8/20μs
ITM 1 ×
Pulse
(A)
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
6000
10000
10000
ITM 2 ×
Pulse
(A)
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
4500
6500
6500
Specifications (25 °C)
Typical
Maximum
CapaciClamping
tance
Voltage
f=
8/20μs
1MHz
VN(DC) VN(DC)
IPK
C
VC
Min Max
(V)
(V) (A) (pF)
162 198 300 50
1100
162 198 300 100 2400
184 226 340 50 1000
184 226 340 100 1900
200 240 360 50
900
200 240 360 100 1750
216 264 395 50
800
216 264 395 100 1600
243 297 455 50
700
243 297 455 100 1400
281 344 530 50
630
281 344 530 100 1250
324 396 595 50
550
324 396 595 100 1100
351 429 650 50
500
351 429 650 100 1000
387 473 710 50
450
387 473 710 100 900
423 517 775 50
400
423 517 775 100 800
459 561 840 50
380
459 561 840 100 750
558 682 1025 50
360
558 682 1025 100 700
612 748 1120 50
300
612 748 1120 100 600
675 825 1240 100 200
Varistor
Voltage at
1mA Test
Current
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
TMOV® Ratings & Specifications (Continued...)
Continuous
Lead–free and RoHS
Compliant Models
Standard
Models
Disc
DiaMeter
Part
Number
Branding
Part
Number
Branding
TMOV20RP510E
TMOV20RP550E
TMOV20RP575E
TMOV20RP625E
TMOV20RP750E
P2T510E
P2T550E
P2T575E
P2T625E
P2T750E
TMOV20R510E
TMOV20R550E
TMOV20R575E
TMOV20R625E
TMOV20R750E
20T510E
20T550E
20T575E
20T625E
20T750E
AC
Volts
VM(AC)RMS
(mm)
20
20
20
20
20
(V)
510
550
575
625
750
Maximum Rating (85°C)
Transient
Suppressed
Energy
Voltage
2ms
Rating
UL 1449
Table 60.1
(V)
n/a
n/a
n/a
n/a
n/a
WTM
(J)
325
360
375
400
480
Peak Surge
Current 8/20μs
ITM 1 ×
Pulse
(A)
10000
10000
10000
10000
10000
ITM 2 ×
Pulse
(A)
6500
6500
6500
6500
6500
Specifications (25 °C)
Typical
Maximum
CapaciClamping
tance
Voltage
f=
8/20μs
1MHz
VN(DC) VN(DC)
IPK
C
VC
Min Max
(V)
(V) (A) (pF)
738 902 1355 100 350
819 1001 1500 100 300
856 1047 1568 100 275
900 1100 1650 100 250
1080 1320 1980 100 175
Varistor
Voltage at
1mA Test
Current
NOTE: For 14mm devices with a voltage rating greater than 420V, please contact factory regarding availability.
Lead–free And RoHS
Compliant Models
Standard
Models
Part
Number
Branding
Part
Number
Branding
TMOV14RP115M
TMOV20RP115M
TMOV14RP130M
TMOV20RP130M
TMOV14RP140M
TMOV20RP140M
TMOV14RP150M
TMOV20RP150M
TMOV14RP175M
TMOV20RP175M
TMOV14RP200M
TMOV20RP200M
TMOV14RP230M
TMOV20RP230M
TMOV14RP250M
TMOV20RP250M
TMOV14RP275M
TMOV20RP275M
TMOV14RP300M
TMOV20RP300M
TMOV14RP320M
TMOV20RP320M
TMOV14RP385M
TMOV20RP385M
TMOV14RP420M
TMOV20RP420M
TMOV20RP460M
TMOV20RP510M
TMOV20RP550M
TMOV20RP575M
TMOV20RP625M
TMOV20RP750M
P4T115M
P2T115M
P4T130M
P2T130M
P4T140M
P2T140M
P4T150M
P2T150M
P4T175M
P2T175M
P4T200M
P2T200M
P4T230M
P2T230M
P4T250M
P2T250M
P4T275M
P2T275M
P4T300M
P2T300M
P4T320M
P2T320M
P4T385M
P2T385M
P4T420M
P2T420M
P2T460M
P2T510M
P2T550M
P2T575M
P2T625M
P2T750M
TMOV14R115M
TMOV20R115M
TMOV14R130M
TMOV20R130M
TMOV14R140M
TMOV20R140M
TMOV14R150M
TMOV20R150M
TMOV14R175M
TMOV20R175M
TMOV14R200M
TMOV20R200M
TMOV14R230M
TMOV20R230M
TMOV14R250M
TMOV20R250M
TMOV14R275M
TMOV20R275M
TMOV14R300M
TMOV20R300M
TM0V14R320M
TMOV20R320M
TMOV14R385M
TMOV20R385M
TMOV14R420M
TMOV20R420M
TMOV20R460M
TMOV20R510M
TMOV20R550M
TMOV20R575M
TMOV20R625M
TMOV20R750M
4T115M
20T115M
4T130M
20T130M
4T140M
20T140M
4T150M
20T150M
4T175M
20T175M
4T200M
20T200M
4T230M
20T230M
4T250M
20T250M
4T275M
20T275M
4T300M
20T300M
4T320M
20T320M
4T385M
20T385M
4T420M
20T420M
20T460M
20T510M
20T550M
20T575M
20T625M
20T750M
Continuous
Disc
Diameter
AC
Volts
VM(AC)RMS
(mm)
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
14
20
20
20
20
20
20
20
(V)
115
115
130
130
140
140
150
150
175
175
200
200
230
230
250
250
275
275
300
300
320
320
385
385
420
420
460
510
550
575
625
750
Maximum Rating (85°C)
Specifications (25°C)
Transient
Varistor
Maximum Typical
Voltage at Clamping CapaciSuppressed
Energy
Peak Surge
1mA Test
Voltage
tance
Voltage
2ms
Current 8/20μs
Current
8/20μs f = 1MHz
Rating
ITM 1 × ITM 2 × VN(DC) VN(DC)
UL 1449
IPK
C
WTM
VC
Table 60.1
Pulse Pulse Min Max
(V)
(J)
(A)
(A)
(V)
(V) (A)
(pF)
300
35
6000
4500 162 198 300 50
1100
300
52
10000 6500 162 198 300 100
2400
400
50
6000
4500 184 226 340 50
1000
400
100
10000 6500 184 226 340 100
1900
500
55
6000
4500 200 240 360 50
900
400
110
10000 6500 200 240 360 100
1750
500
60
6000
4500 216 264 395 50
800
400
120
10000 6500 216 264 395 100
1600
700
70
6000
4500 243 297 455 50
700
700
135
10000 6500 243 297 455 100
1400
700
75
6000
4500 281 344 530 50
630
700
154
10000 6500 281 344 530 100
1250
700
80
6000
4500 324 396 595 50
550
700
160
10000 6500 324 396 595 100
1100
800
100
6000
4500 351 429 650 50
500
700
170
10000 6500 351 429 650 100
1000
900
110
6000
4500 387 473 710 50
450
700
190
10000 6500 387 473 710 100
900
900
125
6000
4500 423 517 775 50
400
900
250
10000 6500 423 517 775 100
800
900
136
6000
4500 459 561 840 50
380
900
372
10000 6500 459 561 840 100
750
1200
150
6000
4500 558 682 1025 50
360
1200
300
10000 6500 558 682 1025 100
700
1200
160
6000
4500 612 748 1120 50
300
1200
320
10000 6500 612 748 1120 100
600
n/a
360
10000 6500 675 825 1240 100
200
n/a
325
10000 6500 738 902 1355 100
350
n/a
360
10000 6500 819 1001 1500 100
300
n/a
375
10000 6500 856 1047 1568 100
275
n/a
400
10000 6500 900 1100 1650 100
250
n/a
480
10000 6500 1080 1320 1980 100
175
NOTE: For 14mm devices with a voltage rating greater than 420V, please contact factory regarding availability.
©2009 Littelfuse, Inc.
©2008
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
71
Revision: November 5, 2009
Revision: November 5, 2009
TMOV® and i TMOV® Varistor Series
TMOV®/iTMOV® Series
iTMOV® Ratings & Specifications
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Thermal Characteristics
Current, Energy, Power Derating Curve
10
100
PERCENT OF RATED VALUE
Typical
5A
2.5A
0.5A
0.125A
1
80
60
40
20
0.1
10
100
1000
0
10000
-55
Time(s)
50
60
70
80
90
100
AMBIENT TEMPERATURE (ºC)
110
120
130
Figure 1
Figure 2
Note : The TMOV® and iTMOV® varistors are intended,
in conjunction with appropriate enclosure design, to
help facilitate TVSS module compliance to UL 1449, 2nd
Edition Section 37.4 (abnormal overvoltage limited current
requirements). Under these extreme abnormal overvoltage
conditions, some units will exhibit substantial heating,
arcing and venting prior to opening. Modules should be
designed to contain this possibility. Application testing is
strongly recommended.
For applications exceeding 85°C ambient temperature, the
peak surge current and energy ratings must be reduced as
shown above.
Maximum Clamping Voltage for 14mm Parts
Maximum Clamping Voltage for 20mm Parts
14mm
20mm
10000
10000
Maximum Clamping Voltage
750V
625V
575V
550V
510V
460V
420V
385V
320V
275V
Maximum Leakage Current
Clamping Voltage (V)
Clamping Voltage (V)
Maximum Leakage Current
Maximum Clamping Voltage
1000
100
0.000001 0.00001 0.0001 0.001 0.01
Figure 3
TMOV® and i TMOV® Varistor Series
1
10
100
750V
1000
250V
230V
200V
175V
150V
140V
130V
115V
0.1
625V
575V
550V
510V
460V
420V
385V
320V
300V
275V
100
0.000001 0.00001 0.0001 0.001 0.01
1000 10000
Peak Current (A)
Figure 4
72
Revision: November 5, 2009
250V
230V
200V
175V
150V
140V
130V
115V
0.1
1
10
100
1000 10000
Peak Current (A)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Repetitive Surge Capability for 14mm Parts
10000
1
10000
10
1
10
10
2
Model 14 mm
102
2
10
Model 20 mm
2
3
10
1000
10
4
3
10
1000
5
10
6
10
Peak Current (A)
Peak Current (A)
Repetitive Surge Capability for 20mm Parts
100
4
10
5
106
100
10
10
1
1
10
100
1000
10
10000
100
Figure 6
Impulse Duration (μs)
Figure 5
1000
10000
Impulse Duration (μs)
NOTE: Average power dissipation of transients should not exceed 1.0W
NOTE: Average power dissipation of transients should not exceed 0.6W
Wave Solder Profile
Because the TMOV® and iTMOV® varistors contain a thermal protection device, care must be taken when soldering the devices into place.
Two soldering methods are possible. Firstly, hand soldering: It is recommended to heat-sink the leads of the device. Secondly, wave soldering: It is critically important that all preheat stage and the solder bath temperatures are rigidly controlled.
300
300
Maximum Wave 260C
Maximum Wave 240C
250
TEMPERATURE (ºC)
250
TEMPERATURE (ºC)
TMOV®/iTMOV® Series
Lead–free Profile
Non Lead–free Profile
200
150
100
50
200
150
100
50
0
0
0
0.5
1
Figure 7
1.5
2
2.5
3
3.5
4
0
0.5
Figure 8
TIME(MINUTES)
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Environmental Specifications
Physical Specifications
Lead Material
Non Lead–free parts: Solder coated
Copper wire, or Tin–coated Copper wire
Lead–free parts: Tin–coated Copper wire
Operating/Storage
Temperature
-40°C to +85°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Passive Aging
+85°C, 1000 hours
+/-10% typical voltage change
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Humidity Aging
+85°C, 85% RH , 1000 hours
+/-10% typical voltage change
Device Labeling
Marked with LF, voltage, UL/CSA logos,
and date code
Thermal Shock
+85°C to -40°C 5 times
+/-10% typical voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
73
Revision: November 5, 2009
TMOV® and i TMOV® Varistor Series
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Lead Configurations
TMOV® Varistor
iTMOV® Varistor
2
Thermal
Fuse
Element
Thermal
Fuse
Element
3
3
MOV
1
2
Monitor Lead
MOV
1
Monitor Lead
Note: MOVs are non-polarized passive elements
iTMOV® Varistor Application Examples
The application examples below show how the indicator lead on the iTMOV® can be used to indicate that the thermal
element has been opened. This signifies that the circuit is no longer protected from transients by the MOV.
Application Example 1
Application Example 3
In this case, the LED is normally on, and is off when the
thermal element opens.
This circuit illustrates the use of the monitoring lead of
the iTMOV® varistor to ensure that equipment is only
operated when overvoltage protection present. In normal
operation the load switch relay solenoid is powered via the
indicator lead of the iTMOV® varistor. In the event of the
thermal element being activated, the relay will de-activate,
cutting power to the protected circuit and the fault LED will
illuminate.
To Protected Circuit
Line
iTMOV Varistor
LED
Line
R
Load Switch Relay
(loss of protection)
Line Fuse
Neutral
"Load Powered"
neon lamp
iTMOV Varistor
Application Example 2
Fault LED
(Normallyoff)
R
This circuit utilizes an optocoupler to provide
galvanic isolations between the iTMOV® varistor
and the indicating or alarm circuitry.
Neutral
Please note: Indicator circuits are provided as a
guideline only. Verification of actual indicator circuitry
is the responsibility of the end user. Component
values selected must be appropriate for the specific
AC line voltage service and application.
iTMOV Varistor
R
AC OPTOCOUPLER
To Protected Circuit
Line
Line Fuse
To Protected Circuit
Line Fuse
TO STATUS
ANNUNCIATOR
LIGHT/ALARM
Neutral
TMOV® and i TMOV® Varistor Series
74
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Dimensions
Dia D
Dia D
A
A
Monitor
Lead
L3
L
L
Dia c
Dia b
e3
Dia b
E
E
e1
e
e1
e
e2
Dimension
14mm Size
iTMOV® Varistor
20mm Size
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
14mm Size
Max.
mm (in)
20mm Size
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
A
ALL
17.0 (0.669)
22.0 (0.866)
23.0 (0.906)
28.0 (1.10)
17.0 (0.669)
22.0 (0.866)
23.0 (0.906)
28.0 (1.10)
Dia D
ALL
13.5 (0.531)
17.0 (0.669)
19.0 (0.748)
23.0 (0.906)
13.5 (0.531)
17.0 (0.669)
19.0 (0.748)
23.0 (0.906)
e
ALL
6.5 (0.256)
8.5 (0.335)
6.5 (0.256)
8.5 (0.335)
6.5 (0.256)
8.5 (0.335)
6.5 (0.256)
8.5 (0.335)
115-175
1.5 (0.059)
4.0 (0.157)
1.5 (0.059)
4.0 (0.157)
1.5 (0.059)
4.0 (0.157)
1.5 (0.059)
4.0 (0.157)
200-420
2.0 (0.079)
6.0 (0.236)
2.0 (0.079)
6.0 (0.236)
2.0 (0.079)
6.0 (0.236)
2.0 (0.079)
6.0 (0.236)
460-750
n/a
n/a
0
2.0 (0.079)
n/a
n/a
0
2.0 (0.079)
e2
ALL
n/a
n/a
n/a
n/a
4.0 (0.138)
6.0 (0.236)
4.0 (0.157)
6.0 (0.236)
e3
ALL
n/a
n/a
n/a
n/a
0
2.0 (0.079)
0
2.0 (0.079)
e1
E
L
L3
Dia b
Dia c
Outside Lead Only
115-175
--
9.0 (0.335)
--
9.0 (0.335)
--
9.0 (0.335)
--
9.0 (0.335)
200-275
--
9.5 (0.374)
--
9.5 (0.374)
--
9.5 (0.374)
--
9.5 (0.374)
300-460
--
11.0 (0.433)
--
11.0 (0.433)
--
11.0 (0.433)
--
11.0 (0.433)
510-575
--
n/a
--
12.0 (0.472)
--
n/a
--
12.0 (0.472)
625-750
--
n/a
--
13.0 (0.512)
--
n/a
--
13.0 (0.512)
ALL
25.4 (1.00)
--
25.4 (1.00)
--
25.4 (1.00)
--
25.4 (1.00)
--
ALL
n/a
n/a
n/a
n/a
6.0 (0.236)
--
6.0 (0.236)
--
115-420
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
0.86 (0.034)
460-750
n/a
n/a
0.95 (0.037)
1.05 (0.041)
n/a
n/a
0.95 (0.037)
1.05 (0.041)
ALL
n/a
n/a
n/a
n/a
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
0.86 (0.034)
For 14mm ratings above 420 VRMS contact factory for specifications.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
75
Revision: November 5, 2009
TMOV® and i TMOV® Varistor Series
TMOV®/iTMOV® Series
TMOV® Varistor
VRMS
Voltage
Model
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Tape and Reel Specification
• Reel capacity varies with voltage.
TMOV® VARISTOR WITH OUTER CRIMP
• Leads are crimped and in-line. This excludes the monitor lead on iTMOV® devices which
are not crimped and not in-line.
• To order tape and reel option please add suffix 'L2T7' to end of standard part number.
• Tape and reel option is available for rated voltages up to 420V. Contact factory regarding
availability of higher voltages.
Contact Littelfuse for additional details.
DESCRIPTION
B1
Component Top to
Seating Plane
P
P0
iTMOV® VARISTOR WITH INNER CRIMP
P
P2
DP
DP
DH
DH
C
SEATING
PLANE
W0 W2 W1
H0
Δb
W
ΔD0
P1
P0
31 Max
Pitch of Component
25.4 +/- 1.0
25.4 +/- 1.0
Feed Hole Pitch
12.7 +/- 0.2
12.7 +/- 0.2
8.95 +/- 0.7
8.95 +/- 0.7
12.7 +/- 0.7
12.7 +/- 0.7
P2
F
Lead to Lead Distance
7.5 +/- 0.8
7.5 +/- 0.8
Δh
Component Alignment
2.0 Max
2.0 Max
18.0 +1.0/-0.5
18.0 +1.0/-0.5
12.0 +/- 0.3
12.0 +/- 0.3
W
Tape Width
W0
Hold Down Tape Width
W1
Hole Position
W2
Hold Down Tape
Position
H1
Component Height
40.0 Max
46.5 Max
D0
Feed Hole Diameter
4.0 +/- 0.2
4.0 +/- 0.2
t
Total Tape Thickness
0.7 +/- 0.2
0.7 +/- 0.2
L
Length of Clipped Lead
11.0 Max
11.0 Max
Δp
Component Alignment
3 Max.
1.00mm
3 Max
C
Crimp Length
H0
Seating Plane Height
E
B1
H1
22.5 Max
Feed Hole Center to
Pitch
Hole Center to
Component Center
P1
MODEL SIZE
14mm
20mm
F
t
9.0 +0.75/-0.50 9.0 +0.75/-0.50
0.5 Max
0.5 Max
2.6 typ
2.6 typ
16.0 +/- 0.5
16.0 +/- 0.5
Dimensions in mm
TMOV® and i TMOV® Varistor Series
76
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > TMOV® and iTMOV® Series
Part Numbering System
Standard Parts
TMOV 20 R P
150 E
DEVICE FAMILY
Littelfuse Thermally Protected MOV
DISC DIAMETER (mm)
14 or 20mm
CERAMIC SHAPE
R: Round
LEAD-FREE/RoHS
COMPLIANT OPTION
VM(AC)RMS
115V to 750V
SERIES DESIGNATOR
E: 2-Leaded TMOV Varistor Series
Supplied in Bulk Pack with 7.5mm
lead spacing.
M: 3-Leaded iTMOV Varistor Series
Supplied in Bulk Pack with 7.5mm
lead spacing (between leads 1 & 2)
NOTE: By ordering the standard part number, i.e.
TMOV20R150E or TMOV20RP150E, standard straight lead
styles, standard bulk packing and standard lead spacing will
be supplied. These specifications are as follows:
Straight Leads
•
Bulk Packed
•
7.5mm Lead Spacing
•
Leads not in-line except parts > 420 V
TMOV®/iTMOV® Series
•
(Available in 20mm only)
Pack Quantities
Pack Quantities
Rated
Voltage
Bulk Pack
Model Size
Tape and Reel
Model Size
14mm
20mm
14mm
20mm
115-250
600
400
500
400
275-550
500
300
400
300
575-750
400
200
n/a
n/a
NOTE: Tape and Reel available up to 420V only - please contact factory regarding availability
of higher voltage parts.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
77
Revision: November 5, 2009
TMOV® and i TMOV® Varistor Series
Varistor Products
78
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Radial Lead Varistors > TMOV25STM Series
TMOV25S™ Varistor Series
RoHS
Product scheduled for release by mid 2009
Description
Metal Oxide Varistors (MOVs) are rated for specific AC line
operating voltages. Exceeding these limits through the
application of a sustained abnormal over-voltage condition
could result in overheating and damage to the MOV. This
condition is specifically identified and addressed in the UL
1449 TVSS Standard – called Limited Current Abnormal
Overvoltage test.
Agency Approvals
Agency
Agency File Number
Status
UL14494 “Ed. 3
Pending
1. Under Ul1449 limited current testing parts rated >420V will not open due to 600V voltage limit. Devices
with ratings >420V have not yet been evaluated.
The TMOV® Series is designed to meet the Abnormal Overvoltage requirements of UL 1449 (Abnormal Over-voltage
Limited Current requirements up to and including the
10A/7hrs requirement).
2. Regarding thermal cut-offs for ratings up to 420VAC.
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to
the device. This is a stress only rating and operation of the device at these or other conditions above those
indicated in the operational sections of this specification is not implied.
The TMOV® Varistor can be wave soldered without any
need for special or expensive assembly processes.
Applications
Features
•
TVSS Products
•
AC Panel Protection Modules
•
AC Line Power Supplies
•
Surge Protected Strip Connectors
• Patented integrated
thermal protection device
- Patent #US6636403
•
AC Power Meters
•
•
Inverters, AC/DC power supplies, etc.
•
UPS (Uninterruptible Power Supply)
Designed to facilitate
compliance to
UL1449 3rd Edition
for TVSS product
•
Standard Operating
Voltage Range
Compatible with
Common AC Line
Voltages (115VAC
to 750VAC)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
•
79
Revision: November 5, 2009
RoHS Compliant
and Lead-free
•
Wave solderable
•
High peak surge current
rating up to 20kA at
single 8/20μS impulse
•
Meets UL 1449 Abnormal
Over-voltage test
(Conforms to limited
current testing at 0.5A,
2.5A, 5A and 10A)
•
Standard lead form
and spacing option
•
Low leakage
•
-55°C to +85°C operating
temperature range
TMOV® and i TMOV® Varistor Series
TMOV25S™ Series
The Littelfuse TMOV25S™ (Thermal MOV) Series
addresses this test condition in a single integrated
package. The TMOV® Series is a based on the Littelfuse
UltraMOV™ Series which meets the surge suppressor
component recognition requirements of UL 1449 for both
cord connected and permanently connected TVSS end
products. Additionally, the TMOV® Varistor incorporates a
patented integrated thermally responsive element within
the body of the device which will open-circuit the varistor
in case of overheating due to the abnormal over-voltages
per UL 1449 requirements–Note 1.
Varistor Products
Radial Lead Varistors > TMOV25STM Series
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart.
TMOV25S™Series
Units
115 to 750
V
20,000
A
Continous:
AC Voltage Range (VM(AC)RMS)
Transient:
Peak Pulse Current (ITM)
For 8x20μs Current Wave, single pulse
Single-Pulse Energy Capability
For 2ms Current Wave
170 to 670
J
Operating Ambient Temperature Range (TA)
-55 to +85
°C
Storage Temperature Range (TSTG)
-55 to +125
°C
Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current
<0.01
%/°C
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
2,500
V
Under UL 1449 Limited Current Test Procedure-see NOTE#1
600
V
1,000
MΩ
COATING Insulation Resistance
Note#1 - Under UL1449 limited current testing parts rated >420V will not open due to 600V voltage limit. Devices with ratings >420V have not yet been evaluated.
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or
any other conditions above those indicated in the operational sections of this specification is not implied.
Device Ratings & Specifications
Maximum Rating (85°C)
Continuous
Transient
AC
Volts
Energy
2ms
Peak
Current
8/20μs
Specifications (25 °C)
Varistor Voltage
Clamping
at 1mA Test Voltage at 100A
Current
Current 8/20μs
VN(DC)
Min
(J)
170
ITM 1 ×
Pulse
(A)
20000
190
140
150
P25T175M
175
TMOV25SP230M
P25T230M
TMOV25SP250M
TMOV25SP275M
UL 1449
3RD Edition
Nominal
Discharge
Current
Typical
Capacitance
VN(DC)
Max
VC
VPR2
IN
C
162
198
(V)
295
(V)
400
(A)
5800
(pF)
3200
20000
184
226
335
500
5800
2800
210
20000
200
240
355
500
5800
2500
220
20000
216
264
390
500
5800
2300
250
20000
243
297
450
600
5800
1900
230
300
20000
324
396
585
700
5800
1500
P25T250M
250
330
20000
351
429
640
800
5800
1400
P25T275M
275
350
20000
387
473
700
900
5800
1250
TMOV25SP300M
P25T300M
300
370
20000
423
517
765
1000
5800
1150
TMOV25SP320M
P25T320M
320
390
20000
459
561
825
1000
5800
1080
Part
Number
Branding
TMOV25SP115M
P25T115M
VM(AC)RMS
/MCOV
(V)
115
TMOV25SP130M
P25T130M
130
TMOV25SP140M
P25T140M
TMOV25SP150M
P25T150M
TMOV25SP175M
WTM
(V)
TMOV25SP385M
P25T385M
385
430
20000
558
682
1010
1200
5800
900
TMOV25SP420M1
P25T420M
420
460
20000
612
748
1100
1500
5800
820
TMOV25SP440M1
P25T440M
440
470
20000
643
787
1160
n/a
5800
790
TMOV25SP460M1
P25T460M
460
490
20000
675
825
1220
n/a
5800
750
TMOV25SP510M1
P25T510M
510
520
20000
738
902
1335
n/a
5800
680
TMOV25SP550M1
P25T550M
550
550
20000
819
1001
1475
n/a
5800
630
TMOV25SP625M1
P25T625M
625
600
20000
900
1100
1625
n/a
5800
550
TMOV25SP750M1
P25T750M
750
670
20000
1080
1320
1950
n/a
5800
460
TMOV® and i TMOV® Varistor Series
80
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > TMOV25STM Series
Thermal Characteristics
Current, Energy, Power Derating Curve
Typical time to open circuit under UL 1449 Abnormal
Overvoltage Limited Current Test:
For applications exceeding 85ºC ambient temperature, the
peak surge current and energy ratings must be reduced
as shown below.
10
PERCENT OF RATED VALUE
100
Current (A)
Typical
10 A
5A
1
2.5 A
0.5 A
0.1
10
Figure 1
100
1000
80
60
40
20
0
- 55
10000
Time (secs)
50
60
80
70
90
100
110
120
130
AMBIENT TEMPERATURE (ºC)
Figure 2
TMOV25S™ Series
Transient V–I Characteristic Curves
10000
750
625
Maximum Peak Voltage (V) 550
510
460
420
385
440
1000
320
275
140
115
150
175
230
300
250
130
100
10μA
100μA
1mA
10mA
Figure 3
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
100mA
1A
10A
100A
1000A
10000A
100000A
Peak Current 81
Revision: November 5, 2009
TMOV® and i TMOV® Varistor Series
Varistor Products
Radial Lead Varistors > TMOV25STM Series
Pulse Rating Curve
100000
1
2
10000
10
10
2
10
3
1000
4
10
5
10
10
100
6
∞
10
1
10 Figure 4
100
1000
Impulse Duration (secs)
Soldering Profile
Wave Solder Profile
Because the TMOV25S™ Series contains a thermally
responsive device, care must be taken when soldering
the device into place. Two soldering methods are possible.
Firstly, hand soldering: We recommend the use of pliers
to heat-sink the leads of the device. Secondly, wavesoldering: This is a strenuous process requiring pre-heat
stages to reduce the stresses on devices.
300
MAXIMUM WAVE 260ºC
TEMPERATURE (ºC)
250
It is critically important that all preheat stage and the
solder bath temperatures are rigidly controlled. The
recommended solder for the TMOV® Series is a 62/36/2
(Sn/Pb/Ag), 60/40 (Sn/Pb) or 63/37 (Sn/Pb). Littelfuse also
recommends an RMA solder flux. SAC solders (SnAgCu)
are recommended for Lead-free applications.
TMOV® and i TMOV® Varistor Series
10000
200
150
100
PREHEAT
50
0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
TIME (MINUTES)
Figure 5
82
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > TMOV25STM Series
Physical Specifications
Environmental Specifications
Lead Material
Tin–coated Copper wire
Operating/Storage
Temperature
-40°C to +85°C
Soldering
Characteristics
Solderability per MIL-STD-202,
Method 208E
Passive Aging
+85°C, 1000 hours
-/+10% typical voltage change
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V-0 requirements
Humidity Aging
+85°C, 85%R.H., 1000 hours
-/+10% typical voltage change
Device Labeling
Marked with LF, voltage, UL logos, and
date code
Thermal Shock
+85°C to -40°C 5 times
-/+10% typical voltage change
Solvent Resistance
MIL-STD-202, Method 215F
Moisture Sensitivity
Level 1, J-STD-020C
Application Example
3
Monitor
Lead
Diode
LED
R
2
TO PROTECTED CIRCUIT
Line Fuse
Line
TMOV25S™ Series
The application example left shows how the indicator
lead on the TMOV® can be used to indicate that thermal
element has been opened. This signifies that the circuit is
no longer protected from transients by the MOV.
Neutral 1
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
1
2
3
Monitor
Lead
83
Revision: November 5, 2009
TMOV® and i TMOV® Varistor Series
Varistor Products
Radial Lead Varistors > TMOV25STM Series
Dimensions
E
D
A
e1
L
W
e2
b
Monitor Lead
Product Dimensions (mm)
Part Number
AMAX
BMIN
BMAX
DMAX
e1
e2
L
WMIN
WMAX
E
TMOV25SP115M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
1.5
2.7
11.7
TMOV25SP130M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
1.6
2.9
11.9
TMOV25SP140M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
1.7
3.0
12.0
TMOV25SP150M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
1.8
3.1
12.1
TMOV25SP175M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
1.9
3.3
12.3
TMOV25SP230M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
2.0
3.4
12.4
TMOV25SP250M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
2.1
3.5
12.5
TMOV25SP275M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
2.3
3.7
12.7
TMOV25SP300M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
2.4
3.9
12.9
TMOV25SP320M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
2.6
4.1
13.1
TMOV25SP385M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
3.0
4.7
13.7
TMOV25SP420M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
3.3
5.0
14.0
TMOV25SP440M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
3.4
5.2
14.2
TMOV25SP460M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
3.6
5.4
14.4
TMOV25SP510M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
3.9
5.7
14.7
TMOV25SP550M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
4.2
6.2
15.2
TMOV25SP625M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
4.6
6.6
15.6
TMOV25SP750M
32.5
0.95
1.05
28
12.7+/-1
6.5+/-1
12.7 Min.
5.4
7.7
16.7
For 14mm ratings above 420 VRMS contact factory for specifications.
TMOV® and i TMOV® Varistor Series
84
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > TMOV25STM Series
Part Numbering System
TMOV 25 S P 150 M
DEVICE FAMILY
SERIES DESIGNATOR
Littelfuse thermally responsive MOV
M: 3–Leaded Part
VM(AC)RMS 115V TO 750V
DISC DIAMETER (mm)
25mm
CERAMIC SHAPE
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
S: Square
Rated AC Voltage (VM(AC)RMS) – MCOV
This is the maximum continuous sinusoidal RMS voltage
that may be applied. This voltage may be applied at any
temperature up to the maximum operating temperature
of the device.
UL 1449
An Underwriters Laboratory standard covering the safety
requirements for Surge Protective Devices intended for
permanently connected, cord-connected and direct plug-in
applications.
Maximum Non-Repetitive Surge Current (ITM)
This is the maximum peak current which may be applied
for a single 8/20μs impulse, with rated line voltage also
applied, without causing device failure. The pulse can
be applied to the device in either polarity with the same
confidence factor.
Limited Current Abnormal Over-voltage Test
An AC over-voltage condition applied to a Surge Protective
Device according to UL 1449, Section 39.4. The short
circuit current is limited by series connected resistors
to 10A, 5A, 2.5A, 0.5A and 0.125A. The condition is
maintained for 7 hours or until the device under test
is disconnected from the AC supply or the current or
temperature reaches equilibrium.
Nominal Discharge Current (IN)
Peak value of the current, selected by the manufacturer,
through the SPD having a current waveshape of 8/20μs
where the SPD remains functional after 15 surges.
Maximum Non-Repetitive Surge Energy (WTM)
This is the maximum rated transient energy which may be
dissipated for a single current pulse at a specified impulse
duration, with the rated RMS voltage applied, without
causing device failure.
Voltage Protection Rating (VPR)
A rating selected from a list of preferred values as given
in UL 1449 and assigned to each mode of protection. The
value of VPR is determined as the nearest highest value
taken from UL 1449 to the measured limiting voltage
determined during the transient-voltage surge suppression
test using the combination wave generator at a setting of
6kV, 3kA.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Nominal Voltage (VN(DC))
This is the voltage at which the device changes from the
off (standby state) to the on (clamping state) and enters
its conduction mode of operation. The voltage value is
usually characterised at the 1mA point and has a specified
minimum and maximum voltage range.
85
Revision: November 5, 2009
TMOV® and i TMOV® Varistor Series
TMOV25S™ Series
Term Definitions
Varistor Products
Radial Lead Varistors > TMOV25STM Series
TMOV® and i TMOV® Varistor Series
86
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
RoHS
UltraMOV™ Varistor Series
Description
The UltraMOV™ Metal Oxide Varistor Series is designed
for applications requiring high peak surge current ratings
and high energy absorption capability. UltraMOV™
varistors are primarily intended for use in AC Line Voltage
applications such as Transient Voltage Surge Suppressors
(TVSS), Uninterruptable Power Supplies (UPS), AC Power
Taps, AC Power Meters, or other products that require
voltage clamping of high transient surge currents from
sources such as lightning, inductive load switching, or
capacitor bank switching.
These devices are produced in radial lead package sizes of
7, 10,14 and 20mm and offered in a variety of lead forms.
UltraMOVs™ are manufactured with recognized epoxy
encapsulation and are rated for ambient temperatures up
to 85ºC with no derating. This Series is LASER-branded and
is supplied in bulk, ammo pack (fan-fold), or tape and reel
packaging.
Agency Approvals
Agency
Agency File Number
E320116
116895E
• Lead–free and RoHS
• Characterized for
compliant option available.
maximum standby
Please see the device
current (Leakage)
and ratings specifications • Custom voltage
table for more information
types available
• High peak surge
• Standard lead form and
current rating (ITM) up
lead space options
to 10kA, single 8 x
20 pulse, (20mm)
• Standard operating
voltage range compatible
with common AC
line voltages (130
VAC to 625 VAC)
42201-006
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
UltraMOV™ Series
Units
130 to 625
V
1,750 to 10,000
A
Steady State Applied Voltage:
DC Voltage Range (VM(AC)RMS)
Transients:
Single-Pulse Peak Current (ITM) 8x20μs Wave (See Figure 2)
12.5 to 400
J
Operating Ambient Temperature Range (TA)
Single-Pulse Energy Range (WTM) 2ms Square Wave
-55 to +85
ºC
Storage Temperature Range (TSTG)
-55 to +125
ºC
Temperature Coefficient (a ) of Clamping Voltage (VC) at Specified Test Current
<0.01
%/ºC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
2500
V
COATING Insulation Resistance
1000
MΩ
V
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating
and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
87
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ Varistor Series
TMOV®/iTMOV®™SERIES
ULTRAMOV Series
Features
LR91788
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
UltraMOV™ Series Ratings & Specifications
Lead–free and RoHS
Compliant Models
Standard
Models
Maximum Rating (85°C)
Continuous
Transient
RMS
Volts
DC
Volts
Energy
2ms
Part
Number
Branding
Part
Number
Branding
VM(AC)
VM(DC)
WTM
V07E130P
V10E130P
V14E130P
V20E130P
V07E140P
V10E140P
V14E140P
V20E140P
V07E150P
V10E150P
V14E150P
V20E150P
V07E175P
V10E175P
V14E175P
V20E175P
V07E230P
V10E230P
V14E230P
V20E230P
V07E250P
V10E250P
V14E250P
V20E250P
V07E275P
V10E275P
V14E275P
V20E275P
V07E300P
V10E300P
V14E300P
V20E300P
V07E320P
V10E320P
V14E320P
V20E320P
V07E385P
V10E385P
V14E385P
V20E385P
V07E420P
V10E420P
V14E420P
V20E420P
V07E440P
V10E440P
V14E440P
V20E440P
V07E460P
P7V130
P10V130
P14V130
P20V130
P7V140
P10V140
P14V140
P20V140
P7V150
P10V150
P14V150
P20V150
P7V175
P10V175
P14V175
P20V175
P7V230
P10V230
P14V230
P20V230
P7V250
P10V250
P14V250
P20V250
P7V275
P10V275
P14V275
P20V275
P7V300
P10V300
P14V300
P20V300
P7V320
P10V320
P14V320
P20V320
P7V385
P10V385
P14V385
P20V385
P7V420
P10V420
P14V420
P20V420
P7V440
P10V440
P14V440
P20V440
P7V460
V07E130
V10E130
V14E130
V20E130
V07E140
V10E140
V14E140
V20E140
V07E150
V10E150
V14E150
V20E150
V07E175
V10E175
V14E175
V20E175
V07E230
V10E230
V14E230
V20E230
V07E250
V10E250
V14E250
V20E250
V07E275
V10E275
V14E275
V20E275
V07E300
V10E300
V14E300
V20E300
V07E320
V10E320
V14E320
V20E320
V07E385
V10E385
V14E385
V20E385
V07E420
V10E420
V14E420
V20E420
V07E440
V10E440
V14E440
V20E440
V07E460
7V130
10V130
14V130
20V130
7V140
10V140
14V140
20V140
7V150
10V150
14V150
20V150
7V175
10V175
14V175
20V175
7V230
10V230
14V230
20V230
7V250
10V250
14V250
20V250
7V275
10V275
14V275
20V275
7V300
10V300
14V300
20V300
7V320
10V320
14V320
20V320
7V385
10V385
14V385
20V385
7V420
10V420
14V420
20V420
7V440
10V440
14V440
20V440
7V460
(V)
130
130
130
130
140
140
140
140
150
150
150
150
175
175
175
175
230
230
230
230
250
250
250
250
275
275
275
275
300
300
300
300
320
320
320
320
385
385
385
385
420
420
420
420
440
440
440
440
460
(V)
170
170
170
170
180
180
180
180
200
200
200
200
225
225
225
225
300
300
300
300
320
320
320
320
350
350
350
350
385
385
385
385
420
420
420
420
505
505
505
505
560
560
560
560
585
585
585
585
615
(J)
12.5
25
50
100
13.5
27.5
55
110
15
30
60
120
17
35
70
135
20
42
80
160
25
50
100
170
28
55
110
190
30
60
125
250
32
67
136
273
36
75
150
300
40
80
160
320
44
85
170
340
48
UltraMOV™ Varistor Series
Peak Current
8 x 20μs
ITM
ITM
1x
2x
Pulse
Pulse
(A)
(A)
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
3500
2500
6000
4500
10000
6500
1750
1200
88
Revision: November 5, 2009
Revision: November 5, 2009
Specifications (25°C)
Varistor
Maximum
Typical
Voltage at
Clamping
Capaci1mA DC Test
Voltage
tance
Current
8 x 20μs
VNOM
Min
VNOM
Max
VC
IPK
f = 1MHz
(V)
184
184
184
184
200
200
200
200
216
216
216
216
243
243
243
243
324
324
324
324
351
351
351
351
387
387
387
387
423
423
423
423
459
459
459
459
558
558
558
558
612
612
612
612
643
643
643
643
675
(V)
226
226
226
226
240
240
240
240
264
264
264
264
297
297
297
297
396
396
396
396
429
429
429
429
473
473
473
473
517
517
517
517
561
561
561
561
682
682
682
682
748
748
748
748
787
787
787
787
825
(V)
340
340
340
340
360
360
360
360
395
395
395
395
455
455
455
455
595
595
595
595
650
650
650
650
710
710
710
710
775
775
775
775
840
840
840
840
1025
1025
1025
1025
1120
1120
1120
1120
1180
1180
1180
1180
1240
(A)
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
25
50
100
10
(pF)
180
450
1000
1900
160
400
900
1750
150
360
800
1600
130
350
700
1400
100
250
550
1100
90
220
500
1000
80
200
450
900
70
180
400
800
65
170
380
750
60
160
360
700
55
140
300
600
50
130
260
500
45
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
UltraMOV™ Series Ratings & Specifications (Continued...)
Lead–free and RoHS
Compliant Models
Standard
Models
Maximum Rating (85°C)
Continuous
Transient
RMS
Volts
DC
Volts
Energy
2ms
Part
Number
Branding
Part
Number
Branding
VM(AC)
VM(DC)
WTM
V10E460P
V14E460P
V20E460P
V10E510P
V14E510P
V20E510P
V10E550P
V14E550P
V20E550P
V10E625P
V14E625P
V20E625P
P10V460
P14V460
P20V460
P10V510
P14V510
P20V510
P10V550
P14V550
P20V550
P10V625
P14V625
P20V625
V10E460
V14E460
V20E460
V10E510
V14E510
V20E510
V10E550
V14E550
V20E550
V10E625
V14E625
V20E625
10V460
14V460
20V460
10V510
14V510
20V510
10V550
14V550
20V550
10V625
14V625
20V625
(V)
460
460
460
510
510
510
550
550
550
625
625
625
(V)
615
615
615
670
670
670
745
745
745
825
825
825
(J)
90
180
360
80
165
325
90
180
360
100
200
400
Peak Current
8 x 20μs
ITM
ITM
1x
2x
Pulse
Pulse
(A)
(A)
3500
2500
6000
4500
10000
6500
3500
2500
6000
4500
10000
6500
3500
2500
6000
4500
10000
6500
3500
2500
6000
4500
10000
6500
Specifications (25°C)
Varistor
Maximum
Typical
Voltage at
Clamping
Capaci1mA DC Test
Voltage
tance
Current
8 x 20μs
VNOM
Min
VNOM
Max
VC
IPK
f = 1MHz
(V)
675
675
675
738
738
738
819
819
819
900
900
900
(V)
825
825
825
902
902
902
1001
1001
1001
1100
1100
1100
(V)
1240
1240
1240
1355
1355
1355
1500
1500
1500
1650
1650
1650
(A)
25
50
100
25
50
100
25
50
100
25
50
100
(pF)
120
220
400
110
200
350
100
180
300
90
160
250
NOTE:
1. Average power dissipation of transients should not exceed 0.25W, 0.4W, 0.6W and 1.0W for 7mm, 10mm, 14mm, and 20mm model sizes, respectively.
PERCENT OF PEAK VALUE
Should transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown
on the Device Ratings and Specifications Table for the
specific device. Furthermore, the operating values
need to be derated at high temperatures as shown in
above. Because varistors can only dissipate a relatively
small amount of average power they are, therefore,
not suitable for repetitive applications that involve
substantial amounts of average power dissipation.
100
90
50
10
O1
Current Energy and Power Derating Curve
TIME
T
T1
Figure 2
100
PERCENT OF RATED VALUE
TMOV®/iTMOV®™SERIES
ULTRAMOV Series
Peak Pulse Current Test Waveform
Power Dissipation Ratings
T2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
90
80
70
60
50
40
30
20
10
0
-55
Figure 1
50
60
70
80
90
100 110
120 130 140 150
AMBIENT TEMPERATURE ( oC)
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
89
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ Varistor Series
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Transient V-I Characteristics Curves
Maximum Clamping Voltage for 7mm Parts
V7E130(P)-V7E460(P)
10000
MAXIMUM PEAK VOLTAGE (V)
MODEL SIZE = 7MM
TA = -55oC TO 85oC
130 to 460V M(AC) RATING
MAXIMUM CLAMP
VOLTAGE
1000
440
420
MAXIMUM
LEAKAGE
385
460
275
300
320
250
230
150 175
130 140
Figure 3
100
10-6
10-5
10-4
0.001
0.01
0.1
1
10
100
1000
10000
1000
10000
PEAK CURRENT (A)
Maximum Clamping Voltage for 10mm Parts
V10E130(P)-V10E625(P)
10000
MODEL SIZE = 10MM
TA = -55oC TO 85oC
130 to 625V M(AC) RATING
MAXIMUM PEAK VOLTAGE (V)
MAXIMUM CLAMP
VOLTAGE
625
550
510
420
460 440
320
385
275
300
250
230
MAXIMUM
LEAKAGE
1000
150 175
130 140
Figure 4
100
10-6
10-5
10-4
0.001
0.01
0.1
1
10
100
PEAK CURRENT (A)
Maximum Clamping Voltage for 14mm Parts
V14E130(P) - V14E625(P)
10000
MODEL SIZE = 14MM
TA = -55oC TO 85oC
130 to 625VM(AC) RATING
MAXIMUM PEAK VOLTAGE (V)
MAXIMUM CLAMP
VOLTAGE
625
MAXIMUM
LEAKAGE
550
510
420
460 440
385
320
300
275
250
230
1000
150 175
130 140
Figure 5
100
10-6
10-5
10-4
0.001
0.01
0.1
1
10
100
1000
10000
PEAK CURRENT (A)
UltraMOV™ Varistor Series
90
Revision: November 5, 2009
Revision: November 5, 2009
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Transient V-I Characteristics Curves (Continued...)
Maximum Clamping Voltage for 20mm Parts
V20E130(P) - V20E625(P)
10000
MODEL SIZE = 20MM
TA = -55oC TO 85oC
130 to 625V M(AC) RATING
MAXIMUM PEAK VOLTAGE (V)
MAXIMUM CLAMP
VOLTAGE
625
MAXIMUM
LEAKAGE
550
510
420
460 440
385
320
300
275
250
230
1000
150 175
130 140
100
10-6
Figure 6
10-5
10-4
0.001
0.01
0.1
1
10
100
1000
10000
PEAK CURRENT (A)
Pulse Rating Curves
TMOV®/iTMOV®™SERIES
ULTRAMOV Series
Repetitive Surge Capability for 7mm Parts
V7E130(P) - V7E460(P)
10000
MODEL SIZE = 7MM
TA = -55oC TO 85oC
130 to 460V M(AC) RATING
1
1000
2
SURGE CURRENT (A)
10
10 4
10 5
10 6
10 2
10 3
100
∞
10
Figure 7
1
10
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
100
1000
10000
IMPULSE DURATION (μs)
91
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ Varistor Series
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Pulse Rating Curves (Continued...)
Repetitive Surge Capability for 10mm Parts
V10E130(P) - VIOE625(P)
10000
MODEL SIZE = 10MM
TA = -55oC TO 85oC
130 to 625V M(AC) RATING
1
2
SURGE CURRENT (A)
1000
10
10 4
10 2
10 5
10 3
10 6
100
∞
10
Figure 8
1
10
1000
100
10000
IMPULSE DURATION (μs)
Repetitive Surge Capability for 14mm Parts
V14E130(P) -V14E625(P)
10000
1
MODEL SIZE = 14MM
TA = -55oC TO 85oC
130 to 625V M(AC) RATING
2
10
102
1000
104
105
106
SURGE CURRENT (A)
103
100
∞?
10
Figure 9
1
10
100
1000
10000
IMPULSE DURATION ( μs)
Repetitive Surge Capability for 20mm Parts
V20E130(P) -V20E625(P)
100000
MODEL SIZE = 20MM
TA = -55oC TO 85oC
130 to 625V M(AC) RATING
1
10000
2
SURGE CURRENT (A)
10
102
104 5
10 6
10
103
1000
100
∞?
10
Figure 10
1
10
100
1000
10000
IMPULSE DURATION ( μs)
UltraMOV™ Varistor Series
92
Revision: November 5, 2009
Revision: November 5, 2009
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Wave Solder Profile
Non Lead–free Profile
Lead–free Profile
300
300
250
TEMPERATURE (ºC)
250
200
150
100
200
150
100
50
50
0
0
0
0.5
1
Figure 11
1.5
2
2.5
3
3.5
4
0
0.5
Figure 12
TIME(MINUTES)
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Physical Specifications
Environmental Specifications
Lead Material
Tin–C oated Copper Wire
Operating/Storage
Temperature
-55°C to +85°C/-55°C to +125°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% typical voltage change
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Thermal Shock
+85°C to -40°C 5 times
+/-10% typical voltage change
Device Labeling
Marked with LF, voltage, UL/CSA logos,
and date code
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
UltraMOV™ Series Varistors for Hi-Temperature Operating Conditions:
•
Phenolic Coated UltraMOV™ Series devices are available with
improved maximum operating temperature 125°C.
•
These devices also have improved temperature cycling performance capability.
•
Ratings and Specifications are as per standard UltraMOV™ Series
except Hi–Pot Encapsulation (Isolation Voltage Capability) = 500V.
•
Phenolic Coating is HALOGEN FREE. To order: change 'E' (Epoxy
coating) in part number to 'P' (Phenolic coating; e.g. V20P230). See
Part Numbering System section of this series for more information.
•
UL Approval for Phenolic Coating parts to E75961 Pending.
•
Contact factory for further details.
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
93
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ Varistor Series
TMOV®/iTMOV®™SERIES
ULTRAMOV Series
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Product Dimensions (mm)
Lead form options L2 and L4
(refer to table below)
Lead form options L1 and L3
(refer to table below)
*SEATING
ATRIM
PLANE
LTRIM
*Seating plane interpretation per IEC-717
(not available on tape or ammo pack)
Dimension
A
7mm Size
10mm Size
14mm Size
VRMS
Voltage
Model
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
130-320
-
12 (0.472)
-
16 (0.630)
-
385-625
-
13 (0.512)
-
17 (0.689)
-
20mm Size
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
20 (0.787)
-
26.5 (1.043)
20.5 (0.807)
-
28 (1.102)
ØD
All
-
9 (0.354)
-
12.5 (0.492)
-
17 (0.669)
-
23 (0.906)
e (Note 2)
All
4 (0.157)
6 (0.236)
6.5 (0.256)
8.5 (0.335)
6.5 (0.256)
8.5 (0.335)
9 (0.354)
11 (0.433)
130-320
1.5 (0.059)
3.5 (0.138)
1.5 (0.059)
3.5 (0.138)
1.5 (0.059)
3.5 (0.138)
1.5 (0.059)
3.5 (0.138)
385-625
2.5 (0.098)
5.5 (0.217)
2.5 (0.098)
5.5 (0.217)
2.5 (0.098)
5.5 (0.217)
2.5 (0.098)
5.5 (0.217)
130-320
-
5.6 (0.220)
-
5.6 (0.220)
-
5.6 (0.220)
-
5.6 (0.220)
385-510
-
7.3 (0.287)
-
7.3 (0.287)
-
7.3 (0.287)
-
7.3 (0.287)
550-625
-
8.3 (0.327)
-
8.3 (0.327)
-
8.3 (0.327)
-
-8.3 (0.327)
Øb
All
0.585
(0.023)
0.685
(0.027)
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
(Note 2)
0.86 (0.034)
(Note 2)
A TRIM
All
-
15 (0.591)
-
19.5 (0.768)
-
22.5 (0.886)
-
29.0 (1.142)
L (L2)
All
25.4 (1.00)
-
25.4 (1.00)
-
25.4 (1.00)
-
25.4 (1.00)
-
*L (L4)
All
2.41 (0.095)
4.69 (0.185)
2.41 (0.095)
4.69 (0.185)
2.41 (0.095)
4.69 (0.185)
2.41 (0.095)
4.69 (0.185)
e1 (Note 3)
E
NOTES:
1. Measurements displayed in Millimeters (Inches in parentheses).
2. Standard lead space.
3. For in-line lead option L3, dimension e1 is “zero”. Straight lead form option L1 shown.
For information about bulk packaging quantities, please refer to the Ordering Notes section at the end of this document.
UltraMOV™ Varistor Series
94
Revision: November 5, 2009
Revision: November 5, 2009
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Tape Specifications for Reel and Ammo Pack Items (Refer to dimensions on following page)
7mm Devices
10, 14 and 20mm Devices
CRIMPED LEADS "L2"
P
P2
CRIMPED LEADS "L2"
E
DP
DP
DH
DH
C
SEATING
PLANE
E
DP
DH
DH
C
SEATING
PLANE
H1
W0 W2 W1
H0
W0 W2 W1
H0
b
b
W
W
D0
D0
P1
t
F
P1
P0
t
F
P1
INLINE LEADS "L3"
INLINE LEADS "L3"
P2
P
P2
P
DP
E
DP
E
DP
DH
DH
DP
DH
DH
H1
H1
W0W2 W1
H
W0
H
b
W2 W1
b
W
W
D0
D0
t
F
P0
P0
STRAIGHT LEADS "L1"
P
P2
t
F
P1
P1
STRAIGHT LEADS "L1"
E
DP
P2
DP
P
DH
DH
E
DP
DP
DH
DH
H1
H1
W2 W1 W0
H
b
W0W2 W1
H
b
W
W
D0
P1
F
D0
t
P0
P1
F
t
P0
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
95
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ Varistor Series
TMOV®/iTMOV®™SERIES
ULTRAMOV Series
H1
P
P2
DP
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Tape Specifications for Reel and Ammo Pack Items (Refer to drawings on previous page)
•
•
•
•
•
•
•
•
•
Conforms to ANSI and EIA specifications.
Can be supplied to IEC Publication 286-2.
Radial devices on tape are offered with crimped leads, straight leads, or in-line leads. See Ordering Information.
For 10mm devices 'P' (component pitch) is 12.7mm when 'F' (lead space) is 5mm.
7mm parts are available on tape and reel up to 460 VAC only
10mm parts are available on tape and reel up to 510 VAC only
14mm and 20mm parts are available on tape and reel up to 550 VAC only
7mm devices with 7.5mm lead spacing option will be taped at 25.4mm component pitch and 500 pieces per reel
10mm devices with 5.0mm lead spacing option will be taped at 12.7mm component pitch and 1000 pieces per reel
Symbol
Description
Model Size
7mm
10mm
14mm
20mm
B1
Component Top to Seating Plane
15 Max
19.5 Max
22.5 Max
29 Max
C
Crimp Length
2.4 Typ
2.6 Typ
2.6 Typ
2.6 Typ
P
Pitch of Component
12.7 +/- 1.0
25.4 +/- 1.0
25.4 +/- 1.0
25.4 +/- 1.0
P0
Feed Hole Pitch
12.7 +/- 0.2
12.7 +/- 0.2
12.7 +/- 0.2
12.7 +/- 0.2
P1
Feed Hole Center to Pitch
3.85 +/- 0.7
8.85 +/- 0.7
8.85 +/- 0.7
7.70 +/- 0.7
P2
Hole Center to Component Center
6.35 +/- 0.7
12.7 +/- 0.7
12.7 +/- 0.7
12.7 +/- 0.7
F
Lead to Lead Distance
5.0 +/- 0.8
7.5 +/- 0.8
7.5 +/- 0.8
10.0 +/- 0.8
Δh
Component Alignment
2.0 Max
2.0 Max
2.0 Max
2.0 Max
18.0 +1.0 / -0.5
18.0 +1.0 / -0.52
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
12.0 +/- 0.3
12.0 +/- 0.3
12.0 +/- 0.3
12.0 +/- 0.3
9.0 +0.75 / -0.50
9.0 +0.75 / - 0.50
9.0 +0.75 / 0.50
9.0 +0.75 / -0.50
0.5 Max
0.5 Max
0.5 Max
0.5 Max
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
W
Tape Width
W0
Hold Down Tape Width
W1
Hole Position
W2
Hold Down Tape Position
H
Height from Tape Center to Component Base
H0
Seating Plane Height
16.0 +/- 0.5
16.0 +/- 0.5
16.0 +/- 0.5
16.0 +/- 0.5
H1
Component Height
32.0 Max
36.0 Max
40.0 Max
46.5 Max
D0
Feed Hole Diameter
4.0 +/- 0.2
4.0 +/- 0.2
4.0 +/- 0.2
4.0 +/- 0.2
t
Total Tape Thickness
0.7 +/- 0.2
0.7 +/- 0.2
0.7 +/- 0.2
0.7 +/- 0.2
3° Max, 1.00mm
3° Max, 1.00mm
3° Max, 1.00mm
3° Max, 1.00mm
Δp
Component Alignment
For information on tape and reel packaging quantities, please refer to the Ordering Notes section at the end of this document.
UltraMOV™ Varistor Series
96
Revision: November 5, 2009
Revision: November 5, 2009
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM Series
Part Numbering System
OPTION CODES
BASE PART CODES
(See notes below)
(See Ratings & Specifications tables and notes below)
V XX E XXX
LX X X XXXXX
P
For “VARISTOR”
OTHER NONSTANDARD OPTIONS
X2855: Nickel barrier coated wire option
(see notes below)
DISC DIAMETER:
07, 10, 14, or 20 (mm)
NONSTANDARD LEAD SPACING OPTIONS:
Blank: Standard lead spacing (see Dimensions Table)
5: 5mm Lead Spacing
7: 7.5mm Lead Spacing
1: 10mm Lead Spacing
ENCAPSULATION:
E = Epoxy
P = Phenolic (Halogen Free)
VM(AC)RMS :
130 to 625 (V)
PACKAGING:
B: Bulk Pack
T: Tape and Reel
A: Ammo Pack
UltraMOV™ is a trademark of Littelfuse, Inc.
LEAD FORMATION:
L1: Straight
L2: Crimped
L3: In-Line
L4: Trim/Crimp (Bulk pack only)
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
For standard parts, use the BASE PART designator only.
PACKAGING:
For parts with non-standard options (such as
additional form, packaging and lead space options)
use, BASE PART + OPTION CODE.
Littelfuse UltraMOV™ varistors are shipped standard in bulk
pack with straight leads and lead spacing outlined in the
dimensions sections of this document. Contact a Littelfuse
representative to discuss non-standard options.
OPTION CODE items are subject to availability and
minimum order requirements. Please contact a Littelfuse
representative if you require additional information
Standard Part Default Conditions
Device Size
Part #
Lead Space
Packaging
BASE PART CODES:
7mm
V07E–
5.0-/+1
Bulk
Lead–free/RoHS Designator:
10mm
V10E–
7.5-/+1
Bulk
For Lead–free and RoHS compliant parts add "P" after the BASE
PART number and before any other OPTION CODE:
Standard Model
Order As
V07E130
V07E130P
Standard Model
with Option
Order As
V07E130L1B5
V07E130PL1B5
14mm
V14E–
7.5-/+1
Bulk
20mm
V20E–
10.0-/+1
Bulk
Standard Bulk Pack Quantity
Standard Bulk Pack Quantity
Varistor
Voltage
Varistor Model Size
7mm
10mm
14mm
20mm
1500
1000
700
500
OPTION CODES:
130 – 275
X2855: Nickel Barrier COATED WIRE OPTION
300 – 460
1500
700
600
400
510 – 625
1500
700
500
400
All standard parts use Tin–coated Copper Wire Nickel Barrier
Coated Wire is available as an option, consisting of Copper Wire
with a flashing of Nickel followed by a top coating of Tin.
Tape & Reel Quantity
To order: append standard model BASE PART number with
"X2855." Example:
Standard Model
Order As
V18ZA40
V18ZA40X2855
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov.html for current information.
Shipping Quantity Per Reel
Varistor
Voltage
7mm
10mm
14mm
20mm
130 – 275
1000
500
500
500
300 – 625
1000
500
400
400
97
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Revision: November 5, 2009
UltraMOV™ Varistor Series
TMOV®/iTMOV®™SERIES
ULTRAMOV Series
Ordering Notes:
Varistor Products
98
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Radial Lead Varistors > UltraMOVTM 25S Series
RoHS
UltraMOVTM 25S Varistor Series
Description
The UltraMOVTM 25S Varistor Series is designed for
applications requiring high peak surge current ratings and
high energy absorption capability. UltraMOV™ varistors are
primarily intended for use in AC Line Voltage applications
such as Surge Protective Devices (SPD), Uninterruptable
Power Supplies (UPS), AC Power Taps, AC Power Meters,
or other products that require voltage clamping of high
transient surge currents from sources such as lightning,
inductive load switching, or capacitor bank switching.
These devices have 25mm square forms are produced
in a radial lead package and offered with straight leads.
UltraMOVs are manufactured with recognized epoxy
encapsulation and are rated for ambient temperatures
up to 85°C with no derating. This 25S Series is
LASER-branded and is supplied in bulk packaging.
Agency Approvals
Agency FIle Number
Status
E320116
Approved
091788
Approved
Features
• Lead–free and
RoHS compliant.
• High peak surge
current rating (ITM)
22kA, single 8/20μs
pulse, (25mm)
• 40kA rating when 2
devices paralleled
(VN(DC) matched
within +/- 5%,
contact factory for
special selections
• Standard operating
voltage range
compatible with
common AC line
voltages (115 to
750VAC)
• Characterized for
maximum standby
current (Leakage)
• Custom voltage
types available
• Standard lead form
and lead space options
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
UltraMOVTM 25S Series
Continuous
Steady State Applied Voltage:
Units
AC Voltage Range (VM(AC)RMS)
115 to 750
V
DC Voltage Range (VM(DC))
150 to 970
V
22,000
A
Transients:
Peak Pulse Current (ITM) 8x20μs Current Wave Single Pulse
Single-Pulse Energy Capability (WTM) 2ms Current Wave
230 to 890
J
Operating Ambient Temperature Range (TA)
-55 to +85
ºC
Storage Temperature Range (TSTG)
-55 to +125
ºC
<0.01
%/C
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Dielectic Withstand DC for 1 min per MIL–STD–202, Method 301
Insulation Resistance of the Epoxy Coating
2500
V
1000
MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
99
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ 25S Varistor Series
ULTRAMOV™ 25S Series
Agency
Varistor Products
Radial Lead Varistors > UltraMOVTM 25S Series
UltraMOV™ 25S Series Ratings & Specifications
Part
Number
Branding
V25S115P
V25S130P
V25S140P
V25S150P
V25S175P
V25S230P
V25S250P
V25S275P
V25S300P
V25S320P
V25S385P
V25S420P
V25S440P
V25S460P
V25S510P
V25S550P
V25S625P
V25S750P
P25S115
P25S130
P25S140
P25S150
P25S175
P25S230
P25S250
P25S275
P25S300
P25S320
P25S385
P25S420
P25S440
P25S460
P25S510
P25S550
P25S625
P25S750
Maximum Rating (85°C)
Continuous
Transient
Peak Surge
Energy
AC Volts DC Volts
Current
2ms
8 x 20μs
WTM
ITM
VM(DC)
1x
VM(AC)RMS
1 x Pulse
Pulse
(V)
(V)
(J)
(A)
115
150
230
22000
130
170
255
22000
140
180
285
22000
150
200
300
22000
175
225
315
22000
230
300
400
22000
250
320
435
22000
275
350
470
22000
300
385
500
22000
320
420
540
22000
385
505
630
22000
420
560
655
22000
440
585
675
22000
460
615
690
22000
510
670
700
22000
550
745
765
22000
625
825
800
22000
750
970
890
22000
Specifications (25°C)
Varistor Voltage
at 1mA DC
Test Current
VNOM
Min
Maximum
UL 1449 ed.3
Clamping
Voltage
Voltage at 100A,
Protection
8 x 20μs
Rating
VNOM
Max
VC
198
226
240
264
297
396
429
473
517
561
682
748
787
825
902
1001
1100
1320
295
335
355
390
450
585
640
700
765
825
1010
1100
1160
1220
1335
1475
1625
1950
(V)
162
184
200
216
243
324
351
387
423
459
558
612
643
675
738
819
900
1080
Typical
Capacitance
f = 1MHz
VPR
C
400
500
500
500
600
700
800
900
1000
1000
1200
1500
n/a
n/a
n/a
n/a
n/a
n/a
(pF)
4500
3900
3500
3200
2550
1900
1750
1610
1450
1350
1080
1000
900
870
820
750
660
550
(V)
Transient V-I Characteristics Curves
Peak Current, Energy and Power Derating Curve
Peak Pulse Current Test Waveform for Clamping Voltage
100
PER C EN T O F PEAK VAL U E
P E R C E N T O F R A TE D V A L U E
100
80
60
40
20
0
0
55
Figure 1
50
50
60
70
80
90
O1
100 110 120 130
AM BIEN T T EM PER AT U R E (ºC )
T IM E
t2
Figure 2
For applications exceeding 85ºC ambient temperature, the
peak surge current and energy ratings must be reduced as
shown above.
UltraMOV™ 25S Varistor Series
t
t1
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
100
Revision: November 5, 2009
Revision: November 5, 2009
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM 25S Series
V-I Limit Curves
10000
M a xim u m P e a k Vo lta g e (V )
625
440
420
385
510
460
750
550
1000
115
100
0.0 0 0 0 1
0.0 0 0 1
0.0 0 1
0.0 1
Figure 3
130
0.1
140
150
175
1
10
250
230
100
275
300
1000
320
10000
100000
ULTRAMOV™ 25S Series
P e a k C u rre n t (A )
Pulse Rating Curves
100000
1
2
10000
10
1 02
Peak Current (A)
1 03
1000
1 04
1 05
1 06
100
∞
10
1
10
100
Figure 4
©2009 Littelfuse, Inc.
©2008
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
1000
10000
Impulse Duration (μs)
101
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ 25S Varistor Series
Varistor Products
Radial Lead Varistors > UltraMOVTM 25S Series
Wave Solder Profile
Non Lead–free Wave Solder Profile
Lead–free Wave Solder Profile
300
300
250
TEMPERATURE (ºC)
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
250
200
150
100
50
200
150
100
50
0
0
0
0.5
1
1.5
2
2.5
3
3.5
4
0
TIME(MINUTES)
Figure 5
0.5
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Figure 6
Physical Specifications
Environmental Specifications
Lead Material
Tin–coated Copper wire
Operating/Storage
Temperature
-55°C to +85°C/
-55°C to +125°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Passive Aging
+85°C, 1000 hours
+/-10% typical voltage change
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% typical voltage change
Device Labeling
Marked with LF, voltage, UL/CSA Logos,
and date code
Thermal Shock
+85°C to -40°C 5 times
+/-10% typical voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
UltraMOVTM 25S Series Varistors for High-Temperature Operating Conditions:
Phenolic coated devices are available with improved maximum operating temperature 125ºC.
These devices also have improved temperature cycling capability. Ratings and specifications
are per standard series except Hi–Pot Encapsulation (Isolation Voltage Capability) = 500V.
To order: add 'X1347' to part number (e.g. V25S150PX1347). These devices are NOT UL, CSA,
CECC or VDE certified.Contact factory for further details.
UltraMOV™ 25S Varistor Series
102
Revision: November 5, 2009
Revision: November 5, 2009
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
Varistor Products
Radial Lead Varistors > UltraMOVTM 25S Series
Product Dimensions (mm)
L
A
A
max
b
e1
min
e1
max
E
max
V25S115P
1.5
2.7
5.7
V25S130P
1.6
2.9
5.9
b
max
D
max
E
e
max
V25S140P
1.7
3.0
6.0
1.8
3.1
6.1
V25S175P
1.9
3.3
6.3
V25S230P
2.0
3.4
6.4
V25S250P
2.1
3.5
6.5
V25S275P
2.3
3.7
6.7
V25S300P
2.4
3.9
6.9
2.6
4.1
7.1
3.0
4.7
7.7
32.5
0.95
1.05
28
V25S385P
e1
e
min
V25S150P
V25S320P
e
b
min
11.7
13.7
V25S420P
3.3
5.0
8.0
V25S440P
3.4
5.2
8.2
V25S460P
3.6
5.4
8.4
V25S510P
1.6
3.4
8.7
V25S550P
1.9
3.9
9.2
V25S625P
2.3
4.3
9.6
V25S750P
3.1
5.4
10.7
L
min
25.4
Notes
1. Additional optional lead form, packaging and lead spacing requirements are subject to availability and to minimum
order requirements. Please contact factory for details.
2. Nickel Barrier Wire option (Suffix 'X2855')Standard parts use Tin-Coated Copper wire. Nickel Barrier Coated Wire
is available as an option. This is Copper Wire with a flashing of Nickel, followed by a top coat of Tin. To order please
add suffix 'X2855' to end of standard part number. Contact factory for more details if required.
3. UltraMOV 25S have been qualified as type 1 application by UL1449 edition 3, which allows Permanant Connection
between the secondary of the service transformer and the line side of the service equipment overcurrent device,
as well as the load side, including watt-hour meter socket enclosures and intended to be installed without an
external overcurrent protective device.
©2008
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ultramov25s.html for current information.
103
Revision: November 5, 2009
Revision: November 5, 2009
UltraMOV™ 25S Varistor Series
ULTRAMOV™ 25S Series
D
Varistor Products
104
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Radial Lead Varistors > C-III series
RoHS
C-III Varistor Series
Description
The C-III Series of Metal-Oxide Varistors (MOVs) are
specifically designed for applications requiring high surge
energy absorption ratings and superior multiple pulse
absorption rating. This is achieved through a special
dielectric material formulation which also results in
higher repetitive surge ratings than other MOV types.
The C-III Series is primarily intended for use in AC
line Transient Voltage Surge Suppressor (TVSS)
product environment and other similar applications
requiring high transient energy and peak current
capability in a relatively small package size.
Agency Approvals
Features
Agency File Number
• Lead–free and RoHS
compliant option
available. Please see
the device and ratings
specifications table
for more information
E320116
LR91788
116895E
• High energy
absorption capability
WTM 40J to 530J (2ms)
42201-006
• Wide operating
voltage range
VM(AC)RMS 130V to 680V
• Available in tape and
reel for automatic
insertion; Also available
with crimped and/or
trimmed lead styles
• High pulse life rating
• No derating up to
85ºC ambient
• High peak pulse
current capability
ITM 3500A to
9000A (8/20μs)
• The C-III Series is
supplied in 10mm,
14mm and 20mm
disc versions with
various lead options
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
C-III Series
Units
130 to 660
V
3500 to 9000
A
Steady State Applied Voltage:
DC Voltage Range (VM(AC)RMS)
Transients:
Single-Pulse Peak Current (ITM) 8/20μs Wave
(See Peak Pulse Current Test Waveform)
Single-Pulse Energy Range (WTM) 2ms Rectangular Wave
40 to 530
J
Operating Ambient Temperature Range (TA)
-55 to +85
ºC
Storage Temperature Range (TSTG)
-55 to +125
ºC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
<0.0
%/ºC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
5000
V
COATING Insulation Resistance
1000
MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
105
Revision: November 5, 2009
C-III Varistor Series
C–III Series
Agency
Varistor Products
Radial Lead Varistors > C-III series
C-III Series Ratings
Lead–free and RoHS Compliant
Models
Part Number
V130LA5CP
V130LA10CP
V130LA20CP
V130LA20CPX325
V140LA5CP
V140LA10CP
V140LA20CP
V140LA20CPX340
V150LA5CP
V150LA10CP
V150LA20CP
V150LA20CPX360
V175LA5CP
V175LA10CP
V175LA20CP
V175LA20CPX425
V230LA10CP
V230LA20CP
V230LA40CP
V230LA40CPX570
V250LA10CP
V250LA20CP
V250LA40CP
V250LA40CPX620
V275LA10CP
V275LA20CP
V275LA40CP
V275LA40CPX680
V300LA10CP
V300LA20CP
V300LA40CP
V300LA40CPX745
V320LA10CP
V320LA20CP
V320LA40CP
V320LA40CPX810
V385LA20CP
V385LA40CP
V420LA20CP
V420LA40CP
V460LA10CP
V460LA20CP
V460LA40CP
V480LA80CP
V510LA80CP
V550LA80CP
V575LA80CP
V625LA80CP
V660LA80CP
V680LA100CP
C-III Varistor Series
Standard Models
Branding
Part Number
P130L5C
P130L10C
P130L20C
P130X325
P140L5C
P140L10C
P140L20C
P140X340
P150L5C
P150L10C
P150L20C
P150X360
P175L5C
P175L10C
P175L20C
P175X425
P230L10C
P230L20C
P230L40C
P230X570
P250L10C
P250L20C
P250L40C
P250X620
P275L10C
P275L20C
P275L40C
P275X680
P300L10C
P300L20C
P300L40C
P300X745
P320L10C
P320L20C
P320L40C
P320X810
P385L20C
P385L40C
P420L20C
P420L40C
V460L10C
V460L20C
P460L40C
P480L80C
P510L80C
P550L80C
P575L80C
P625L80C
P660L80C
P680L100C
V130LA5C
V130LA10C
V130LA20C
V130LA20CX325
V140LA5C
V140LA10C
V140LA20C
V140LA20CX340
V150LA5C
V150LA10C
V150LA20C
V150LA20CX360
V175LA5C
V175LA10C
V175LA20C
V175LA20CX425
V230LA10C
V230LA20C
V230LA40C
V230LA40CX570
V250LA10C
V250LA20C
V250LA40C
V250LA40CX620
V275LA10C
V275LA20C
V275LA40C
V275LA40CX680
V300LA10C
V300LA20C
V300LA40C
V300LA40CX745
V320LA10C
V320LA20C
V320LA40C
V320LA40CX810
V385LA20C
V385LA40C
V420LA20C
V420LA40C
V460LA10C
V460LA20C
V460LA40C
V480LA80C
V510LA80C
V550LA80C
V575LA80C
V625LA80C
V660LA80C
V680LA100C
Continuous
Branding
Maximum VRMS
VM(AC)
130L5C
130L10C
130L20C
130CX325
140L5C
140L10C
140L20C
140CX340
150L5C
150L10C
150L20C
150CX360
175L5C
175L10C
175L20C
175CX425
230L10C
230L20C
230L40C
230X570
250L10C
250L20C
250L40C
250CX620
275L10C
275L20C
275L40C
275CX680
300L10C
300L20C
300L40C
300CX745
320L10C
320L20C
320L40C
320CX810
385L20C
385L40C
420L20C
420L40C
460L10C
460L20C
460L40C
480L80C
510L80C
550L80C
575L80C
625L80C
660L80C
680L100C
130
130
130
130
140
140
140
140
150
150
150
150
175
175
175
175
230
230
230
230
250
250
250
250
275
275
275
275
300
300
300
300
320
320
320
320
385
385
420
420
460
460
460
480
510
550
575
625
660
680
106
Revision: November 5, 2009
Maximum Ratings (85 °C)
Transient
Peak Current (8/20μs)
Withstanding
ITM1 1 Pulse ITM2 2 Pulses
Energy (2ms)WTM (
)
(A)
(A)
40
3500
3000
80
6000
5000
200
9000
7000
200
9000
7000
45
3500
3000
90
6000
5000
210
9000
7000
210
9000
7000
50
3500
3000
100
6000
5000
215
9000
7000
215
9000
7000
55
3500
3000
110
6000
5000
220
9000
7000
220
9000
7000
60
3500
3000
125
6000
5000
280
9000
7000
280
9000
7000
65
3500
3000
135
6000
5000
300
9000
7000
300
9000
7000
70
3500
3000
145
6000
5000
320
9000
7000
320
9000
7000
75
3500
3000
155
6000
5000
335
9000
7000
335
9000
7000
80
3500
3000
165
6000
5000
345
9000
7000
345
9000
7000
175
6000
5000
370
9000
7000
185
6000
5000
390
9000
7000
95
3500
3000
190
6000
5000
430
9000
7000
420
9000
7000
440
9000
7000
450
9000
7000
460
9000
7000
490
9000
7000
510
9000
7000
520
9000
7000
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
Varistor Products
Radial Lead Varistors > C-III series
Lead–free And
RoHS Compliant
Models
Standard Models
Part Number
Part Number
V130LA5CP
V130LA10CP
V130LA20CP
V130LA20CPX325
V140LA5CP
V140LA10CP
V140LA20CP
V140LA20CPX340
V150LA5CP
V150LA10CP
V150LA20CP
V150LA20CPX360
V175LA5CP
V175LA10CP
V175LA20CP
V175LA20CPX425
V230LA10CP
V230LA20CP
V230LA40CP
V230LA40CPX570
V250LA10CP
V250LA20CP
V250LA40CP
V250LA40CPX620
V275LA10CP
V275LA20CP
V275LA40CP
V275LA40CPX680
V300LA10CP
V300LA20CP
V300LA40CP
V300LA40CPX745
V320LA10CP
V320LA20CP
V320LA40CP
V320LA40CPX810
V385LA20CP
V385LA40CP
V420LA20CP
V420LA40CP
V460LA10CP
V460LA20CP
V460LA40CP
V480LA80CP
V510LA80CP
V550LA80CP
V575LA80CP
V625LA80CP
V660LA80CP
V680LA100CP
V130LA5C
V130LA10C
V130LA20C
V130LA20CX325
V140LA5C
V140LA10C
V140LA20C
V140LA20CX340
V150LA5C
V150LA10C
V150LA20C
V150LA20CX360
V175LA5C
V175LA10C
V175LA20C
V175LA20CX425
V230LA10C
V230LA20C
V230LA40C
V230LA40CX570
V250LA10C
V250LA20C
V250LA40C
V250LA40CX620
V275LA10C
V275LA20C
V275LA40C
V275LA40CX680
V300LA10C
V300LA20C
V300LA40C
V300LA40CX745
V320LA10C
V320LA20C
V320LA40C
V320LA40CX810
V385LA20C
V385LA40C
V420LA20C
V420LA40C
V460L10C
V460L20C
V460LA40C
V480LA80C
V510LA80C
V550LA80C
V575LA80C
V625LA80C
V660LA80C
V680LA100C
Specifications (25 °C)
Varistor Voltage at 1mA Maximum Clamping
Model Size
Duty Cycle Surge Rating
DC Test Current
Voltage (8/20μs)
Disc
Diameter (mm)
VN Max
VC
Ip
VN Min
3kA (8/20μs) 750A (8/20μs)
# Pulses
# Pulses
(V)
(V)
(V)
(A)
10
184
228
340
25
2
100
14
184
228
340
50
40
600
20
184
228
340
100
80
1600
20
184
220
325
100
80
1600
10
198
242
360
25
2
100
14
198
242
360
50
40
600
20
198
242
360
100
80
1600
20
198
230
340
100
80
1600
10
212
268
395
25
2
100
14
212
268
395
50
40
600
20
212
268
395
100
80
1600
20
212
243
360
100
80
1600
10
247
303
455
25
2
100
14
247
303
455
50
40
600
20
247
303
455
100
80
1600
20
247
285
425
100
80
1600
10
324
396
595
25
2
100
14
324
396
595
50
40
600
20
324
396
595
100
80
1600
20
324
384
570
100
80
1600
10
354
429
650
25
2
100
14
354
429
650
50
40
600
20
354
429
650
100
80
600
20
354
413
620
100
80
1600
10
389
473
710
25
2
100
14
389
473
710
50
40
600
20
389
473
710
100
80
1600
20
389
453
680
100
80
1600
10
420
517
775
25
2
100
14
420
517
775
50
40
600
20
420
517
775
100
80
1600
20
420
490
745
100
80
1600
10
462
565
850
25
2
100
14
462
565
850
50
40
600
20
462
565
850
100
80
1600
20
462
540
810
100
80
1600
14
558
682
1025
50
40
600
20
558
682
1025
100
80
1600
14
610
748
1120
50
40
600
20
610
748
1120
100
80
1600
10
640
790
1190
25
2
100
14
640
790
1190
50
40
600
20
640
790
1190
100
80
1600
20
670
825
1240
100
80
1600
20
735
910
1350
100
80
1600
20
780
970
1435
100
80
1600
20
805
1000
1500
100
80
1600
20
900
1100
1725
100
80
1600
20
940
1210
1820
100
80
1600
20
990
1130
1700
100
80
1600
1 Average power dissipation of transients not to exceed 0.6W and 1W for model sizes 14mm and 20mm, respectively.
2 7mm parts also available-contact factory for further information
3 For additional or intermediary voltage ratings contact factory
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
107
Revision: November 5, 2009
C-III Varistor Series
C–III Series
C-III Series Specifications
Varistor Products
Radial Lead Varistors > C-III series
Peak Pulse Current Test Waveform
Power Dissipation Ratings
PERCENT OF PEAK VALUE
Should transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown on the
Device Ratings and Specifications Table for the specific
device. The operating values of a MOV need to be derated
at high temperatures as shown above. Because varistors
only dissipate a relatively small amount of average power
they are not suitable for repetitive applications that involve
substantial amounts of average power dissipation.
100
90
50
10
O1
T
Current Energy and Power Derating Curve
T2
Figure 2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
100
PERCENT OF RATED VALUE
TIME
T1
90
80
70
60
50
40
30
20
10
0
-55
50
60
Figure 1
70
80
90 100 110 120
AMBIENT TEMPERATURE ( oC)
130
140 150
Transient V-I Characteristics Curves
Pulse Rating Curves
Maximum Clamping Voltage for 10mm Parts
Repetitive Surge Capability for 10mm Parts
V130LA5C(P)-V320LA10C(P)
V130LA5C(P) – V460LA10C(P)
10,000
10,000
MODEL SIZE = 10mm
1
2
10
V460LA10C(P)
Maximum Voltage (V)
V300LA10C(P)
V275LA10C(P)
V250LA10C(P)
1,000
V230LA10C(P)
10 2
10 3
10 4
100
8
Peak Rated Surge Current (A)
1,000
V320LA10C(P)
MODEL SIZE = 10mm
10
V175LA5C(P)
V150LA5C(P)
V140LA5C(P)
1
V130LA5C(P)
10
100
100
1,000
10,000
Surge Impulse Duration (μs)
0.001
Figure 3
C-III Varistor Series
0.01
0.1
1
10
Peak Amperes (A)
100
1000
Figure 4
10000
108
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
Varistor Products
Radial Lead Varistors > C-III series
Transient V-I Characteristics Curves (continued)
Pulse Rating Curves
Maximum Clamping Voltage for 14mm Parts
Repetitive Surge Capability for 14mm Parts
V130LA10C(P) – V420LA20C(P)
V130LA10C(P)-V420LA20C(P)
10,000
10,000
1
MODEL SIZE = 14mm
2
10
10
MODEL SIZE = 14mm
V460LA20C(P)
10 2
V230LA20C(P)
V320LA20C(P)
V300LA20C(P)
V275LA20C(P)
1,000
V250LA20C(P)
1,000
3
10
10
3
10140
100
4
8
Peak Rated Surge Current (A)
Maximum Voltage (V)
V420LA20C(P)
V385LA20C(P)
V175LA10C(P)
V150LA10C(P)
V140LA10C(P)
V130LA10C(P)
100
10
0.01
0.1
1
100
10
10000
1000
10
100
Figure 6
Peak Amperes (A)
Maximum Clamping Voltage for 20mm Parts
1,000
10,000
Surge Impulse Duration (μs)
Repetitive Surge Capability for 20mm Parts
V130LA20C(P)-V680LA100C(P)
V130LA5C(P) - V320LA10C (P)
10,000
V680LA100C(P)
V660LA100C(P)
10,000
1
C–III Series
0.001
Figure 5
2
10
V625LA80C(P)
MODEL SIZE = 20mm
MODEL SIZE = 20mm
10 2
10 2
V510LA80C(P)
V420LA40C(P) V460LA40C(P)
V480LA80C(P)
V385LA40C(P)
1,000
10 3
1,000
10 3
10 4
100
8
Peak Rated Surge Current (A)
Maximum Voltage (V)
V575LA80C(P)
V320LA40C(P)
V300LA40C(P)
V275LA40C(P)
V250LA40C(P)
V230LA40C(P)
V175LA20C(P)
V150LA20C(P)
V140LA20C(P)
V130LA20C(P)
10
100
Figure 7
0.001
0.01
0.1
1
100
10
1000
10
10000
Figure 8
Peak Amperes (A)
100
1,000
Surge Impulse Duration (μs)
10,000
Maximum Clamping Voltage for Low Clamping Voltage Parts
V130LA20CX325(P) - V300LA40CX245 (P)
10,000
Maximum Voltage (V)
V300LA40CX810(P)
V300LA40CX745(P)
V275LA40CX680(P)
V250LA40CX620(P)
1,000
V230LA40CX570(P)
V175LA20CX425(P)
V150LA20CX360(P)
V140LA20CX340(P)
V130LA20CX325(P)
100
Figure 9
0.001
0.01
0.1
1
10
Peak Amperes (A)
100
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
1000
10000
109
Revision: November 5, 2009
C-III Varistor Series
Varistor Products
Radial Lead Varistors > C-III series
Wave Solder Profile
Lead–free Profile
Non Lead–free Profile
300
300
250
TEMPERATURE (ºC)
250
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
200
150
100
200
150
100
50
50
0
0
0
0.5
1
Figure 10
1.5
2
2.5
3
3.5
0
4
0.5
Figure 11
TIME(MINUTES)
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Physical Specifications
Environmental Specifications
Lead Material
Tin–Coated Copper Wire
Operating/Storage
Temperature
-55°C to +85°C/-55°C to +125°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% typical voltage change
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Device Labeling
Marked with LF, voltage, UL/CSA Logos,
and date code
+85°C to -40°C 10 times
+/-10% typical voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
C-III Series Varistors for Hi-Temperature Operating Conditions:
•
Phenolic Coated CIII Series devices are available with improved maximum operating maximum temperature 125ºC
•
These devices also have improved temperature cycling performance capability.
•
Ratings and Specifications are as per standard CIII Series except Hi–Pot
Encapsulation (Isolation Voltage Capability)=500V.
•
To order: add X1347 to part number (e.g. V230LA40CX1347)
•
These devices are not UL, CSA, VDE or CECC certified.
•
Contact factory for further details.
C-III Varistor Series
110
Revision: November 5, 2009
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
Varistor Products
Radial Lead Varistors > C-III series
AC Bias Reliability
The C-III Series MOVs were designed for use on the AC
line. The varistor is connected across the AC line and is
biased with a constant amplitude sinusoidal voltage. It
should be noted that the definition of failure is a shift in the
nominal varistor voltage (VN) exceeding +/-10%. Although
this type of varistor is still functioning normally after this
magnitude of shift, devices at the lower extremities of VN
tolerance will begin to dissipate more power.
High Temperature Operating Life 125ºC for 1000 Hours
at Rated Bias
300
VNOM AT 1mA (V)
V130LA20C
Because of this possibility, an extensive series of
statistically designed tests were performed to determine
the reliability of the C-III type of varistor under AC bias
combined with high levels of temperature stress. To
date, this test has generated over 50,000 device hours of
operation at a temperature of 125ºC, although only rated at
85ºC. Changes in the nominal varistor voltage, measured at
1mA, of less than 2% have been recorded, as displayed in
the diagram at right.
250
200
150
100
0
100
200
300
Figure 12
400 500 600 700
TIME (HOURS)
800
900 1000 1100
Transient Surge Current/Energy Transient Capability
The transient surge rating serves as an excellent figure
of merit for the C-III varistor. This inherent surge handling
capability is one of the C-III varistor’s best features.
The enhanced surge absorption capability results from
improved process uniformity and enhanced construction.
The homogeneity of the raw material powder and
improved control over the sintering and assembly
processes are contributing factors to this improvement.
CLAMPING VOLTAGE AT 3kA
500
In the low power AC mains environment, industry
standards (UL, IEC, NEMA and IEEE) all suggest that the
worst case surge occurrence will be 3kA. Such a transient
event may occur up to five times over the equipment life
time (approximately 10 years). While the occurences of
five 3kA transients is the required capability, the rated,
repetitive surge current for the C-III Series is 80 pulses
for the 20mm units and 40 pulses for the 14mm Series.
V130LA20C
3kA (8/20μs)
450
400
350
(RATED FOR 80 PULSES)
300
0
10
20
30
Figure 13
CLAMPING VOLTAGE AT 750A
As a measure of the inherent device capability, samples
of the 20mm V130LA20C devices were subjected to a
worst case repetitive transient surges test. After 100
pulses, each of 3kA, there was negligible change in
the device characteristics. Changes in the clamping
voltage, measured at 100A, of less than 3% were
recorded, as shown in the upper diagram at right.
Samples of the 14mm Series V175LA20C were subjected
to repetitive surge occurrences of 750A. Again, there was
negligible changes in any of the device characteristics after
2000 pulses, as shown in the lower diagram at right.
C–III Series
Typical Repetitive Surge Current Capability of
C-III Series MOVs
40 50 60 70 80
NUMBER OF SURGES
600
90 100 110 120
V175LA20C
750A (8/20μs)
550
500
450
400
350
300
(RATED FOR 1600 PULSES)
0
Figure 14
200
400
600
800
1000
1200 1400
1600
2000
NUMBER OF SURGES
In both cases the inherent device capability is far
in excess of the expected worst case scenario.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
111
Revision: November 5, 2009
C-III Varistor Series
Varistor Products
Radial Lead Varistors > C-III series
Product Dimensions (mm)
ØD
A
*SEATING
ATRIM
PLANE
LTRIM
25.4
(1.00)
Øb
CRIMPED AND
LEAD
CRIMPED
ANDTRIMMED
TRIMMED
LEADS
Radial lead types can be supplied with combination preformed
crimp and trimmed leads. This option is supplied to the
dimensions shown below.
e
e1
E
*Seating plane interpretation per IEC-60717
10mm Size
14mm Size
20mm Size
Dimension
VRMS Voltage
Model
Min.
Max.
Min.
Max.
Min.
Max.
A
All
12.0 (0.472)
16.0 (0.630)
13.5 (0.531)
20.0 (0.787)
17.5 (0.689)
28.0 (1.102)
ØD
All
10.0 (0.394)
12.5 (0.492)
13.5 (0.531)
17.0 (0.669)
17.5 (0.689)
23.0 (0.906)
e
All
6.5 (0.256)
8.5 (0.335)
6.5 (0.256)
8.5 (0.335)
6.5 (0.256)
8.5 (0.335)
2.5 (0.098)
5.5 (0.216)
2.5 (0.098)
5.5 (0.216)
2.5 (0.098)
5.5 (0.216)
4.5 (0.177)
9.0 (0.354)
4.5 (0.177)
9.0 (0.354)
–
7.3 (0.287)
–
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
0.86 (0.034)
e1
E
Øb
130 - 320
>320
130 - 320
>320
130 - 320
>660
7.3 (0.287)
11.0 (0.433)
–
7.3 (0.287)
11.0 (0.433)
0.76 (0.030)
0.86 (0.034)
0.95 (0.037)
1.05 (0.041)
ATRIM
All
–
19.5 (0.768)
–
23.5 (0.925)
–
30.0 (1.18)
LTRIM
All
2.41 (0.095)
4.69 (0.185)
2.41 (0.095)
4.69 (0.185)
2.41 (0.095)
4.69 (0.185)
Dimensions are in millimeters (inches)
1. 10mm lead spacing also available. See additional lead style options.
2. 7mm and 12mm devices also available upon request. Contact factory for details.
C-III Varistor Series
112
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
Varistor Products
Radial Lead Varistors > C-III series
Tape and Reel Specifications
• (available for voltage ratings up to 320V only)
Symbol
CRIMPED LEADS "LT"
P
E
DP
DP
DH
DH
C
SEATING
PLANE
H1
W0 W2 W1
H0
b
W
D0
P1
t
F
P1
STRAIGHT LEADS "LS"
P
P2
E
DP
10mm
Model Size
14mm 20mm
P
Pitch of Component
P0
Feed Hole Pitch
12.7 -/+ 0.2
P1
Feed Hole Center to Pitch
8.85 -/+ 0.8
P2
Hole Center to Component
Center
12.7 -/+ 0.7
F
Lead to Lead Distance
7.50 -/+ 0.8
h
Component Alignment
W
Tape Width
W0
Hold Down Tape Width
W1
Hole Position
W2
Hold Down Tape Position
25.4 -/+1.0
2.00 Max
18.25 -/+ 0.75
12.0 -/+ 0.3
9.125 -/+ 0.625
0.5 Max
H
Height From Tape Center To
Component Base
19.0 -/+1.0
H0
Seating Plane Height
16.0 -/+ 0.5
H1
Component Height
D0
Feed Hole Diameter
4.0 -/+ 0.2
0.7 -/+ 0.2
36 Max
40 Max
t
Total Tape Thickness
p
Component Alignment
3° Max
U
Under crimp Width
8.0 Max
46.5
Max
DP
DH
DH
H1
W0 W2 W1
H
b
W
D0
P1
t
F
P0
UNDER-CRIMPED LEADS "LU"
P
P2
E
DP
DP
DH
DH
U
H1
W0 W2 W1
Ho
b
W
D0
P1
F
t
P0
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
113
Revision: November 5, 2009
C-III Varistor Series
C–III Series
P2
Description
Varistor Products
Radial Lead Varistors > C-III series
Part Numbering System
BASE PART CODES
(See Ratings & Specifications tables and notes below)
V XXXX LA XX C
P
OPTION CODES
(See notes below)
XXXXX
See OPTIONS CODES notes below
For “VARISTOR”
V M(AC)
(Three or four digits -- 130V to 1,000V)
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
SERIES + PACKAGING / LEAD STYLE
DESIGNATOR
(See BASE PART CODES notes below)
LA = Bulk Pack / Straight Leads (standard)
LC = Bulk Pack / Crimped and Trimmed Leads
LS = Tape and Reel / Straight Leads
LT = Tape and Reel / Crimped Leads
LU = Tape and Reel / Under-Crimped Leads
RELATIVE ENERGY INDICATOR
(One or Two Digits)
For standard parts, use the BASE PART designator only.
For parts with non-standard options (such as additional form, packaging
and lead space options), use BASE PART + OPTION CODE.
OPTION CODE items are subject to availability and minimum order
requirements. Please contact a Littelfuse products representative for
additional information or questions
C-III SERIES DESIGNATOR
Ordering Notes:
BASE PART CODES:
OPTION CODES:
Series + Packaging / Lead Style Designators:
X10: 10MM LEAD SPACING OPTION --
Ordering examples:
For 10 (-/+1)mm lead spacing (available on 20mm
diameter models only), append standard model
BASE PART number with "X10." Example:
Straight
Lead
Bulk Pack
(standard)
Straight
Lead
Tape &
Reel
Crimped
Lead
Tape &
Reel
V130LA20C
V130LS20C
V130LT20C
Crimped &
UnderTrimmed Crimp Lead
Lead
Tape &
Bulk Pack
Reel
V130LC20C
Standard Model
Order As
V130LA20C
V130LA20CX10
V130LU20C
X2855: Nickel Barrier COATED WIRE OPTION --
Crimped leads are standard on LA Series varistors supplied in
tape and reel, denoted with "LT."
All standard parts use Tin–Coated Copper wire. Nickel
Barrier Coated wire is available as an option, consisting
of Copper wire with a flashing of Nickel followed by
a top coating of Tin. To order append standard model
BASE PART number with "X2855." Example:
"LC" style is supplied in bulk only.
"LU" style is supplied in tape & reel only.
For crimped leads without trimming and any varitions other than
that described above, please contact Littelfuse.
Standard Model
Order As
V130LA20C
V130LA20CX2855
Lead–free / RoHS Designator:
Littelfuse C-III Series varistors are shipped standard in bulk pack
with straight leads and lead spacing outlined in the Package
Dimensions section of this data sheet. Contact a Littelfuse
representative to discuss non-standard options.
For Lead–free and RoHS compliant parts add "P" after the BASE
PART number and before any other OPTION CODE:
Standard Model
Order As
V130LA20C
V130LA20CP
TAPE & REEL QUANTITIES:
Device Size
Voltage
ALL
≤ 275V
≥ 275V
≤ 275V
≥ 275V
Standard Model
with Option
Order As
10mm
V420LA20CX1347
V420LA20CPX1347
14mm
20mm
C-III Varistor Series
114
Revision: November 5, 2009
"T" Reel
500
500
400
500
400
Quantity Per Reel
"S" Reel
"U"Reel
500
500
500
500
400
400
500
500
400
400
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/c-iii.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
RoHS
LA Varistor Series
Description
The LA Series of transient voltage surge suppressors are
radial leaded varistors (MOVs) that are designed to be
operated continuously across AC power lines. These UL
recognized varistors require very little mounting space,
and are offered in various standard lead form options.
The LA Series varistors are available in four model
sizes: 7mm, 10mm, 14mm and 20mm; and have a
VM(AC)RMS voltage range from 130V to 1000V, and an
energy absorption capability up to 360J. Some LA Series
model numbers are available with clamping voltage
selections, designated by a model number suffix of
either A or B. The 'A' selection is the standard model;
the 'B' selection provides a lower clamping voltage.
See LA Series Device Ratings and Specifications
Table for part number and brand information.
Agency Approvals
Agency
Agency File Number
E320116, E56529, E135010
• Lead–free and RoHS
compliant option
available. Please see
the device and ratings
specifications table
for more information.
LR91788
42201-006
•
Energy absorption
capability (WTM)
up to 360J
•
Wide operating
voltage range
VM(AC)RMS 130V to 1000V
•
No derating up to
85ºC ambient
•
Available in tape and
reel or bulk pack
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
LA Series
Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
130 to 1000
V
DC Voltage Range (VM(DC))
175 to 1200
V
1200 to 6500
A
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range
For 10/1000μs Current Wave (WTM)
11 to 360
J
Operating Ambient Temperature Range (TA)
-55 to +85
O
Storage Temperature Range (TSTG)
-55 to +125
O
C
C
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
<0.01
%/OC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
2500
V
COATING Insulation Resistance
1000
MΩ
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
115
Revision: November 5, 2009
LA Varistor Series
LA Series
Features
116895E
Varistor Products
Radial Lead Varistors > LA Series
LA Series Ratings & Specifications
Lead–free
and RoHS Compliant
Models
Part
Number
V130LA1P
V130LA2P
V130LA5P
V130LA10AP
V130LA20AP
V130LA20BP
V140LA2P
V140LA5P
V140LA10AP
V140LA20AP
V150LA1P
V150LA2P
V150LA5P
V150LA10AP
V150LA20AP
V150LA20BP
V175LA2P
V175LA5P
V175LA10AP
V175LA20AP
V230LA4P
V230LA10P
V230LA20AP
V230LA40AP
V250LA2P
V250LA4P
V250LA10P
V250LA20AP
V250LA40AP
V250LA40BP
V275LA2P
V275LA4P
V275LA10P
V275LA20AP
V275LA40AP
V275LA40BP
V300LA2P
V300LA4P
V300LA10P
V300LA20AP
V300LA40AP
V320LA7P
V320LA10P
V320LA20AP
V320LA40BP
V385LA7P
V385LA10P
V385LA20AP
LA Varistor Series
Standard
Models
Branding
Part
Number
Branding
P1301
P1302
P1305
P130L10
P130L20
P130L20B
P1402
P1405
P140L10
P140L20
P1501
P1502
P1505
P150L10
P150L20
P150L20B
P1752
P1755
P175L10
P175L20
P2304
P230L
P230L20
P230L40
P2502
P2504
P250L
P250L20
P250L40
P250L40B
P2752
P2754
P275L
P275L20
P275L40
P275L40B
P3002
P3004
P300L
P300L20
P300L40
P3207
P320L
P320L20
P320L40
P3857
P385L
P385L20
V130LA1
V130LA2
V130LA5
V130LA10A
130LA20A
V130LA20B
V140LA2
V140LA5
V140LA10A
V140LA20A
V150LA1
V150LA2
V150LA5
V150LA10A
V150LA20A
V150LA20B
V175LA2
V175LA5
V175LA10A
V175LA20A
V230LA4
V230LA10
V230LA20A
V230LA40A
V250LA2
V250LA4
V250LA10
V250LA20A
V250LA40A
V250LA40B
V275LA2
V275LA4
V275LA10
V275LA20A
V275LA40A
V275LA40B
V300LA2
V300LA4
V300LA10
V300LA20A
V300LA40A
V320LA7
V320LA10
V320LA20A
V320LA40B
V385LA7
V385LA10
V385LA20A
1301
1302
1305
130L10
130L20
130L20B
1402
1405
140L10
140L20
1501
1502
1505
150L10
150L20
150L20B
1752
1755
175L10
175L20
2304
230L
230L20
230L40
2502
2504
250L
250L20
250L40
250L40B
2752
2754
275L
275L20
275L40
275L40B
3002
3004
300L
300L20
300L40
3207
320L
320L20
320L40
3857
385L
385L20
Model
Size
Disc
Dia.
(mm)
7
7
10
14
20
20
7
10
14
20
7
7
10
14
20
20
7
10
14
20
7
10
14
20
7
7
10
14
20
20
7
7
10
14
20
20
7
7
10
14
20
7
10
14
20
7
10
14
Maximum Rating (85°C)
Continuous
Transient
VRMS
VM(AC)
(V)
130
130
130
130
130
130
140
140
140
140
150
150
150
150
150
150
175
175
175
175
230
230
230
230
250
250
250
250
250
250
275
275
275
275
275
275
300
300
300
300
300
320
320
320
320
385
385
385
Specifications (25°C)
Varistor
Maximum
Typical
Voltage at
Clamping
CapaciEnergy Peak
1mA
Voltage
tance f =
VDC
10 x
Current
DC Test
8 x 20 μs
1MHz
1000μs 8 x 20μs
Current
VNOM VNOM
VM(DC) WTM
ITM
IPK
C
VC
Min Max
(V)
(J)
(A)
(V)
(V)
(V)
(A)
(pF)
175
11
1200
184
255
390
10
180
175
11
1200
184
228
340
10
180
175
20
2500
184
228
340
25
450
175
38
4500
184
228
340
50
1000
175
70
6500
184
228
340
100
1900
175
70
6500
184
220
325
100
1900
180
12
1200
198
242
360
10
160
180
22
2500
198
242
360
25
400
180
42
4500
198
242
360
50
900
180
75
6500
198
242
340
100
1750
200
13
1200
212
284
430
10
150
200
13
1200
212
268
395
10
150
200
25
2500
212
268
395
25
360
200
45
4500
212
268
395
50
800
200
80
6500
212
268
395
100
1600
200
80
6500
212
243
360
100
1600
225
15
1200
247
303
455
10
130
225
30
2500
247
303
455
25
350
225
55
4500
247
303
455
50
700
225
90
6500
247
303
455
100
1400
300
20
1200
324
396
595
10
100
300
35
2500
324
396
595
25
250
4500
324
396
595
50
550
300
70
300
122
6500
324
396
595
100
1100
330
21
1200
354
473
730
10
90
330
21
1200
354
429
650
10
90
330
40
2500
354
429
650
25
220
330
72
4500
354
429
650
50
500
330
130
6500
354
429
650
100
1000
330
130
6500
354
413
620
100
1000
369
23
1200
389
515
775
10
80
369
23
1200
389
473
710
10
80
369
45
2500
389
473
710
25
200
369
75
4500
389
473
710
50
450
369
140
6500
389
473
710
100
900
369
140
6500
389
453
680
100
900
405
25
1200
420
565
870
10
70
405
25
1200
420
517
775
10
70
405
46
2500
420
517
775
25
180
405
77
4500
420
517
775
50
400
405
165
6500
420
517
775
100
800
420
25
1200
462
565
850
10
65
420
48
2500
462
565
850
25
170
420
80
4500
462
565
850
50
380
420
150
6500
462
540
810
100
750
505
27
1200
558
682 1025
10
60
505
51
2500
558
682 1025
25
160
505
85
4500
558
682 1025
50
360
116
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
LA Series Ratings & Specifications (Continued...)
Part
Number
Standard
Models
Branding
Part
Number
V385LA40BP
V420LA7P
V420LA10P
V420LA20AP
V420LA40BP
V460LA7P
V460LA10P
V460LA20AP
V460LA40BP
V480LA7P
V480LA10P
V480LA40AP
V480LA80BP
V510LA10P
V510LA40AP
V510LA80BP
V575LA10P
V575LA40AP
V575LA80BP
V625LA10P
V625LA40AP
V625LA80BP
V680LA10P
V680LA80AP
P385L40
P4207
P420L
P420L20
P420L40
P4607
P460L
P460L20
P460L40
P4807
P480L
P480L40
P480L80
P510L
P510L40
P510L80
P575L
P575L40
P575L80
P625L
P625L40
P625L80
P680L
P680L80
V385LA40B
V420LA7
V420LA10
V420LA20A
V420LA40B
V460LA7C
V460LA10
V460LA20A
V460LA40B
V480LA7
V480LA10
V480LA40A
V480LA80B
V510LA10
V510LA40A
V510LA80B
V575LA10
V575LA40A
V575LA80B
V625LA10
V625LA40A
V625LA80B
V680LA10
V680LA80A
V680LA100BP
P680L100 V680LA100B
V660LA10P
V660LA50AP
V660LA100BP
V1000LA80AP
V1000LA160BP
P660L
P660L50
P660L100
P1000L8
P1000L16
Model
Size
Disc
Dia.
(mm)
Branding
VRMS
VDC
VM(AC) VM(DC)
Specifications (25°C)
Varistor
Maximum
Typical
Voltage at
Clamping
CapaciEnergy Peak
1mA
Voltage
tance f =
10 x
Current
DC Test
8 x 20 μs
1MHz
1000μs 8 x 20μs
Current
VNOM VNOM
WTM
ITM
IPK
C
VC
Min Max
(J)
(A)
(V)
(V)
(V)
(A)
(pF)
160
6500
558
682 1025 100
700
30
1200
610
748 1120
10
55
55
2500
610
748 1120
25
140
90
4500
610
748 1120
50
300
160
6500
610
720 1060 100
600
37
1200
640
790 1190
10
55
56
2500
640
790 1190
25
120
100
4500
640
790 1190
50
280
170
6500
640
756 1110 100
560
35
1200
670
825 1240
10
50
60
2500
670
825 1240
25
120
105
4500
670
825 1240
50
270
180
6500
670
790 1160 100
550
63
2500
735
910 1350
25
100
110
4500
735
910 1350
50
250
190
6500
735
860 1280 100
500
65
2500
805 1000 1500
25
90
120
4500
805 1000 1500
50
220
220
6500
805
960 1410 100
450
67
2500
900 1100 1650
25
80
125
4500
900 1100 1650
50
210
230
6500
900 1100 1650 100
425
2500
990 1240 1875
25
65
75
145
4500
990 1240 1875
50
190
(V)
385
420
420
420
420
460
460
460
460
480
480
480
480
510
510
510
575
575
575
625
625
625
680
680
(V)
505
560
560
560
560
615
615
615
615
640
640
640
640
675
675
675
730
730
730
825
825
825
875
875
20
680
875
260
6500
990
1130
1700
100
380
10
14
20
14
20
660 850
660 850
660 850
1000 1200
1000 1200
70
140
250
220
360
2500
4500
6500
4500
6500
940
940
940
1425
1425
1210
1210
1100
1800
1600
1820
1820
1650
2700
2420
25
50
100
50
100
70
200
400
130
250
385L40
4207
420L
420L20
420L40
4607
460L
460L20
460L40
4807
480L
480L40
480L80
510L
510L40
510L80
575L
575L40
575L80
625L
625L40
625L80
680L
680L80
20
7
10
14
20
7
10
14
20
7
10
14
20
10
14
20
10
14
20
10
14
20
10
14
680L100
V660LA10
660L
V660LA50A
660L50
V660LA100B
660L100
V1000LA80A
1000L80
V1000LA160B 1000L160
NOTE: Average power dissipation of transients not to exceed 0.25W, 0.4W, 0.6W or 1W for model sizes 7mm, 10mm, 14mm and 20mm, respectively.
LA Series Varistors for Hi-Temperature Operating Conditions:
•
Phenolic–coated LA Series devices are available with improved maximum operating maximum temperature 125°C.
•
These devices also have improved temperature cycling performance capability.
•
Ratings and Specifications are as per standard LA Series except Hi–Pot Encapsulation (Isolation Voltage Capability) = 500V.
•
These devices are not UL, CSA, VDE or CECC certified.
•
To order: add X1347 to end of part number (e.g. V230LA20AX1347 or V230LA20APX1347 for Lead Free/RoHS version)
•
Product Marking:
Lead-Free/RoHS
Option
Identifier
LF 9
P175P10
YYWW
Pholenic Coated
Option
Identifier
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
117
Revision: November 5, 2009
LA Varistor Series
LA Series
Lead–free
and RoHS Compliant
Models
Maximum Rating (85°C)
Continuous
Transient
Varistor Products
Radial Lead Varistors > LA Series
Peak Pulse Current Test Waveform
Power Dissipation Ratings
PERCENT OF PEAK VALUE
Should transients occur in rapid succession, the average
power dissipation is the energy (watt-seconds) per pulse
times the number of pulses per second. The power so
developed must be within the specifications shown on the
Device Ratings and Specifications Table for the specific
device.The operating values of a MOV need to be derated
at high temperatures as shown in the diagram below.
Because varistors only dissipate a relatively small amount
of average power they are not suitable for repetitive
applications that involve substantial amounts of average
power dissipation.
100
90
50
10
O1
Current Energy and Power Derating Curve
TIME
T1
Figure 2
T2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
100
PERCENT OF RATED VALUE
T
90
80
70
60
50
40
30
20
10
0
-55
50
60
70
80
90
100
110
120
130
140 150
AMBIENT TEMPERATURE ( oC)
Figure 1
LA Varistor Series
118
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
Transient V-I Characteristics Curves
Pulse Rating Curves
Maximum Clamping Voltage for 7mm Parts
Repetitive Surge Capability for 7mm Parts
V130LA1(P) - V480LA7(P)
V130LA1(P) - V300LA2(P)
6,000
5,000
V275LA2(P)
V250LA2(P)
V300LA2(P)
10 2
100
50
20
10
5
300
INDEFINITE
2
V130LA1(P)
10 -2
10 3
10 4
10 5
10 6
10
200
V150LA1(P)
200
10 -3
MODEL SIZE 7mm
V130LA1(P) - V480LA7(P)
2
500
2,000
1,000
900
800
700
600
500
400
1
1,000
SURGE CURRENT (A)
3,000
MAXIMUM PEAK VOLTS (V)
2,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300VM(AC) RATING
TA = -55o C TO 85o C
4,000
10 -1
Figure 3
10 0
10 1
10 2
PEAK AMPERES (A)
10 3
1
20
10 4
Figure 4
100
1,000
IMPULSE DURATION ( μs)
10,000
V130LA2(P) - V300LA4(P)
4,000
MAXIMUM PEAK VOLTS (V)
2,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
130 TO 300VM(AC) RATING
TA = -55o C TO 85o C
V300LA4(P)
V275LA4(P)
V250LA4(P)
V230LA4(P)
LA Series
3,000
1,000
900
800
700
600
500
400
300
V175LA2(P)
V150LA2(P)
V140LA2(P)
V130LA2(P)
200
100
10 -3
10 -2
10 -1
Figure 5
10 0
10 1
PEAK AMPERES (A)
10 2
10 3
10 4
MAXIMUM PEAK VOLTS (V)
V320LA7(P) - V480LA7(P)
MAXIMUM CLAMPING VOLTAGE
5,000 MODEL SIZE 7mm
320 TO 480VM(AC) RATING
TA = -55o C TO 85o C
3,000
V460LA7(P)
V480LA7(P)
2,000
1,000
V420LA7(P)
V385LA7(P)
V320LA7(P)
500
Figure 6
10 -3
10 -2
10 -1
10 0
10 1
PEAK AMPERES (A)
10 2
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
10 3
10 4
119
Revision: November 5, 2009
LA Varistor Series
Varistor Products
Radial Lead Varistors > LA Series
Transient V-I Characteristics Curves (Continued...)
Pulse Rating Curves (Continued...)
Maximum Clamping Voltage for 10mm Parts
Repetitive Surge Capability for 10mm Parts
V130LA5(P) - V420LA10(P)
6,000
5,000
2,000
1,000
V275LA10(P)
V250LA10(P)
V230LA10(P)
V420LA10(P)
V175LA5(P)
10 -2
500
10 -1
Figure 7
10 0
10 1
10 2
PEAK AMPERES (A)
10 3
2
10 2 3
10
10 4
10 5
10 6
10
200
100
50
20
10
V150LA5(P)
V140LA5(P)
V130LA5(P)
300
200
10 -3
MODEL SIZE 10mm
V130LA5(P) - V680LA10(P)
1
2,000
SURGE CURRENT (A)
3,000
1,000
900
800
700
600
500
400
5,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
130 TO 420VM(AC) RATING
TA = -55o C TO 85o C
4,000
MAXIMUM PEAK VOLTS (V)
V130LA5(P) - V680LA10(P)
INDEFINITE
5
2
20
10 4
Figure 8
100
1,000
IMPULSE DURATION ( μs)
10,000
MAXIMUM PEAK VOLTS (V)
V300LA10(P) - V680LA10(P)
MAXIMUM CLAMPING VOLTAGE
5,000 MODEL SIZE 10mm
300 TO 680VM(AC) RATING
TA = -55o C TO 85o C
3,000
2,000
V680LA10(P)
V625LA10(P)
V660LA10(P)
V300LA10(P)
V320LA10(P)
1,000
500
Figure 9
LA Varistor Series
V575LA10(P)
V510LA10(P)
V480LA10(P)/
V460LA10(P)
V385LA10(P)
10 -3
10 -2
10 -1
10 0
10 1
PEAK AMPERES (A)
10 2
10 3
10 4
120
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
Transient V-I Characteristics Curves (Continued...)
Pulse Rating Curves (Continued...)
Maximum Clamping Voltage for 14mm Parts
Repetitive Surge Capability for 14mm Parts
V130LA10A(P) - V320LA20A
V130LA10A(P) - V320LA20A(P)
2,000
V300LA20A(P)
V320LA20A(P)
V275LA20A(P)
V250LA20A(P)
V230LA20A(P)
10
10 -2
10 -1
10 0
10 1
10 2
PEAK AMPERES (A)
10 3
200
100
50
20
Figure 12
10-3
10,000
V385LA20A(P) - V1000LA80A(P)
5,000
1
V1000LA80A(P)
SURGE CURRENT (A)
V680LA80A(P)
V575LA40A(P)
V510LA40A(P)
V480LA40A(P)/V460LA20A(P)
V420LA20A(P)
V385LA20A(P)
10-4
100
1,000
IMPULSE DURATION ( μs)
Figure 11
1,000
500
INDEFINITE
2
20
10 4
V660LA50A(P)
2,000 V625LA40A(P)
700
10 2 3
10
10 4
10 5
10 6
5
V385LA20A(P) V1000LA80A(P)
5,000 MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
385 TO 1000VM(AC) RATING
TA = -55o C TO 85o C
3,000
MODEL SIZE 14mm
V130LA10A(P) - V320LA20A(P)
500
V150LA10A(P)
V140LA10A(P)
V130LA10A(P)
Figure 10
MAXIMUM PEAK VOLTS (V)
1,000
10
300
300
2
V175LA10A(P)
200
10 -3
1
2,000
10-2 10-1 100
101
PEAK AMPERES (A)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
102
103
2,000
2
1,000
10
MODEL SIZE 14mm
V385LA20A(P) - V1000LA80A(P)
10 2 3
10
10 4
10 5
10 6
500
200
LA Series
3,000
1,000
900
800
700
600
500
400
5,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
130 TO 320VM(AC) RATING
TA = -55o C TO 85o C
SURGE CURRENT (A)
MAXIMUM PEAK VOLTS (V)
6,000
5,000
4,000
100
50
20
10
INDEFINITE
5
2
20
104
Figure 13
121
Revision: November 5, 2009
100
1,000
IMPULSE DURATION ( μs)
10,000
LA Varistor Series
Varistor Products
Radial Lead Varistors > LA Series
Transient V-I Characteristics Curves (Continued...)
Pulse Rating Curves (Continued...)
Maximum Clamping Voltage for 20mm Parts
V130LA20A(P) - V275LA40A(P)
V300LA40A - V1000LA160B
5,000
3,000
MAXIMUM PEAK VOLTS (V)
2,000
1,000
900
800
700
600
500
V275LA40A(P)
V250LA40A(P)
400
300
MAXIMUM PEAK VOLTS (V)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
130 TO 275VM(AC) RATING
TA = -55o C TO 85o C
V175LA20A(P)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
300 TO 1000VM(AC) RATING
TA = -55o C TO 85o C
3,000
V1000LA160B(P)
V680LA100B(P)
V625LA80B(P)
V660LA100B(P)
2,000
V575LA80B(P)
V510LA80B(P)
V480LA80B(P)/
V460LA40B(P)
1,000
V420LA40B(P)
V385LA40B(P)
V320LA40B(P)
V300LA40A(P)
V150LA20A(P)
V130LA20A(P)
500
200
10-3
10-2
10-1
Figure 14
100
101
102
PEAK AMPERES (A)
103
10-3
104
10-2
10-1
100
101
102
PEAK AMPERES (A)
Figure 15
103
104
V130LA20B(P) - V275LA40(P)
Repetitive Surge Capability for 20mm Parts
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
2,000 130 TO 275VM(AC) RATING
TA = -55o C TO 85o C
V130LA20A(P) - V320LA40B(P)
10,000
1
5,000
1,000
900
800
700
600
500
400
300
2
10
2,000
SURGE CURRENT (A)
MAXIMUM PEAK VOLTS (V)
3,000
V275LA40B(P)
V250LA40B(P)
V150LA20B(P)
V130LA20B(P)
200
10-3
10-2
10-1
100
101
102
PEAK AMPERES (A)
Figure 16
103
1,000
500
MODEL SIZE 20mm
V130LA20A(P) - V320LA40B(P)
10 2 3
10
10 4
10 5
10 6
200
100
50
20
INDEFINITE
10
5
104
2
1
V130LA20A(P) - V275LA40A(P)
20
100
Figure 18
1,000
IMPULSE DURATION (μs)
10,000
3,000
V385LA40B(P) - V1000LA160B(P)
10,000
1
5,000
2
10
2,000
1,000
SURGE CURRENT (A)
MAXIMUM PEAKVOLTS (V)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
M(AC) RATING
2,000 140 TO 230V
TA = -55o C TO 85o C
V230LA40A(P)
500
V140LA20A(P)
300
200
Figure 17
10-3
10-2
10-1
100
101
102
PEAK AMPERES (A)
103
1,000
500
MODEL SIZE 20mm
V385LA40B(P) - V1000LA160B(P)
10 2 3
10
10 4
10 5
10 6
200
100
50
20
INDEFINITE
10
5
104
2
1
20
Figure 19
100
1,000
IMPULSE DURATION ( μs)
10,000
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than +/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may result in the
device not meeting the original published specifications, but does not prevent the device from continuing to function, and to provide ample protection.
LA Varistor Series
122
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Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
Wave Solder Profile
Non Lead–free Profile
Lead–free Profile
300
300
250
TEMPERATURE (ºC)
250
200
150
100
50
200
150
100
50
0
0
0
0.5
1
Figure 20
1.5
2
2.5
3
3.5
4
0
0.5
1
1.5
Figure 21
TIME(MINUTES)
2
2.5
3
3.5
4
TIME(MINUTES)
Physical Specifications
Environmental Specifications
Lead Material
Tin–Coated Copper Wire
Operating Ambient
Temperature Range
-55°C to +85°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Storage Temperature Range
-55°C to +125°C
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% typical voltage change
Device Labeling
Marked with LF, voltage, UL/CSA logos,
and date code
Thermal Shock
+85°C to -40°C 5 times
+/-10% typical voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
123
Revision: November 5, 2009
LA Varistor Series
LA Series
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
Varistor Products
Radial Lead Varistors > LA Series
Product Dimensions (mm)
*SEATING
PLANE
ATRIM
LTRIM
CRIMPED AND TRIMMED LEAD
Crimped leads are standard on LA types supplied in tape and reel
and are denoted by the model letter "T." Model letter "S" denotes
straight leads and letter "U" denotes special under-crimped leads.
*Seating plane interpretation per IEC-717
Dimension
A
ØD
e
e1
E
7mm Size
10mm Size
14mm Size
20mm Size
VRMS
Voltage
Model
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
V130LA-
-
12
-
16
-
20
-
26.5
(1.043)
V320LA
-
(0.472)
-
(0.630)
-
(0.787)
-
V385LA-
-
13
-
17
-
20.5
-
28
V1000LA
-
(0.0512)
-
(0.689)
-
(0.807)
-
(1.102)
All
-
9 (0.354)
-
12.5 (0.492)
-
17 (0.669)
-
23 (0.906)
8.5 (0.335)
6.5 (0.256)
(Note 2)
8.5
(Note 2)
All
4 (0.157)
6 (0.236)
6.5 (0.256)
8.5 (0.335)
6.5 (0.256)
V130LA-
1.5
3.5
1.5
3.5
1.5
3.5
1.5
3.5
V320LA
(0.059)
(0.138)
(0.059)
(0.138)
(0.059)
(0.138)
(0.059)
(0.138)
V385LA-
2.5
5.5
2.5
5.5
2.5
5.5
2.5
5.5
V1000LA
(0.098)
(0.217)
(0.098)
(0.217)
(0.098)
(0.217)
(0.098)
(0.217)
V130LA-
-
5.6
-
5.6
-
5.6
-
5.6
V320LA
-
(0.220)
-
(0.220)
-
(0.220)
-
(0.220)
V385LA-
-
7.3
-
7.3
-
7.3
-
7.3
V510LA
-
(0.287)
-
(0.287)
-
(0.287)
-
(0.287)
V550LA-
-
8.3
-
8.3
-
8.3
-
8.3
V680LA
-
(0.327)
-
(0.327)
-
(0.327)
-
(0.327)
-
-
-
10.8 (0.425)
-
10.8 (0.425)
0.86 (0.034)
0.76 (0.030)
(Note 2)
0.86 (0.034)
(Note 2)
-
29.0 (1.142)
2.41 (0.095)
4.69 (0.185)
V1000LA
-
-
Øb
All
(Note 3)
0.585
(0.023)
0.685
(0.027)
0.76 (0.030)
0.86 (0.034)
0.76 (0.030)
ATRIM
All
-
15 (0.591)
-
19.5 (0.768)
-
LTRIM
All
2.41 (0.095)
4.69 (0.185)
2.41 (0.095)
4.69 (0.185)
2.41 (0.095)
22.5 (0.886)
(NOTE 4)
4.69 (0.185)
Notes :
1. Dimensions in millimeters, (inches) in parentheses.
2. 10mm (9mm Min. & 11mm Max.) ALSO AVAILABLE; see additional lead style options
3. 1000V parts supplied with lead wire of diameter 1.00 -/+ 0.05 (0.039 -/+ 0.002)
4. 'A' Max. for V1000LC80A (P) = 24.00 (0.945”)
LA Varistor Series
124
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
Tape and Reel Specifications
(Dimensions presented on following page.)
7mm Devices
10, 14 and 20mm Devices
CRIMPED LEADS "LT"
CRIMPED LEADS "LT"
P
P2
P2
E
DP
DH
DH
C
SEATING
PLANE
H1
W0
H0
DP
DH
C
SEATING
PLANE
E
DP
DH
W0 W2 W1
W2 W1
Db
H0
Db
W
W
DD0
DD0
P1
P1
t
F
P0
STRAIGHT LEADS "LS"
P
P2
t
F
P1
STRAIGHT LEADS "LS"
P
P2
E
DP
E
DP
DP
DP
DH
DH
DH
DH
LA Series
H1
P
DP
H1
H1
W0 W2 W1
H
W0 W2 W1
H
Db
Db
W
W
DD0
DD0
P1
P1
t
F
t
F
P0
P0
UNDER-CRIMPED LEADS "LU"
P
P2
UNDER-CRIMPED LEADS "LU"
E
DP
P2
DP
DH
DH
U
H1
E
DP
DH
DH
U
H1
W0 W2 W1
Ho
P
DP
W0 W2 W1
Ho
Db
Db
W
W
DD0
DD0
P1
F
t
P1
F
t
P0
P0
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
125
Revision: November 5, 2009
LA Varistor Series
Varistor Products
Radial Lead Varistors > LA Series
Tape and Reel Specifications (continued)
•
•
•
•
•
•
Conforms to ANSI and EIA specifications
Can be supplied to IEC Publication 286-2
Radial devices on tape are supplied with crimped leads, straight leads, or under-crimped leads
7mm parts are available on tape and reel up to 480 VAC only
10mm parts are available on tape and reel up to 510 VAC only
14mm and 20mm parts are available on tape and reel up to 550 VAC only
Symbol
Model Size
Description
7mm
10mm
14mm
20mm
12.7 +/- 1.0
25.4 +/- 1.0
25.4 +/- 1.0
25.4 +/- 1.0
P
Pitch of Component
P0
Feed Hole Pitch
12.7 +/- 0.2
12.7 +/- 0.2
12.7 +/- 0.2
12.7 +/- 0.2
P1
Feed Hole Center to Pitch
3.85 +/- 0.7
8.85 +/- 0.7
8.85 +/- 0.7
8.85 +/- 0.7
P2
Hole Center to Component Center
6.35 +/- 0.7
12.7 +/- 0.7
12.7 +/- 0.7
12.7 +/- 0.7
F
Lead to Lead Distance
5.0 +/- 0.8
7.5 +/-0.8
7.5 +/- 0.8
7.5 +/- 0.8
h
Component Alignment
W
Tape Width
W0
Hold Down Tape Width
W1
Hole Position
W2
Hold Down Tape Position
H
Height from Tape Center to
Component Base
2.0 Max
2.0 Max
2.0 Max
2.0 Max
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
12.0 +/- 0.3
12.0 +/- 0.3
12.0 +/- 0.3
12.0 +/- 0.3
9.0 +0.75 / -0.50
9.0 +0.75 / -0.50
9.0 +0.75 / -0.50
9.0 +0.75 / -0.50
0.5 Max
0.5 Max
0.5 Max
0.5 Max
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
H0
Seating Plane Height
16.0 +/- 0.5
16.0 +/- 0.5
16.0 +/- 0.5
16.0 +/- 0.5
H1
Component Height
32.0 Max
36.0 Max
40.0 Max
46.5 Max
D0
Feed Hole Diameter
4.0 +/- 0.2
4.0 +/- 0.2
4.0 +/- 0.2
4.0 +/- 0.2
T
Total Tape Thickness
0.7 +/- 0.2
0.7 +/- 0.2
0.7 +/- 0.2
0.7 +/- 0.2
U
Under-crimp Width
P
Component Alignment
8.0 Max
8.0 Max
8.0 Max
8.0 Max
3° Max 1.00mm
3° Max 1.00mm
3° Max 1.00mm
3° Max
NOTE: Dimensions are in mm.
Standard Bulk Pack Quantity
Standard Bulk Pack Quantity
Varistor Voltage Model
Varistor Model Size
7mm
10mm
14mm
20mm
130-275
1500
1000
700
500
300-460
1500
1000
600
400
510-625
1500
1000
500
400
660
N/A
1000
500
400
680
N/A
1000
400
300
1000
N/A
N/A
300
200
LA Varistor Series
126
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Varistor Products
Radial Lead Varistors > LA Series
Part Numbering System
BASE PART CODES
(See Ratings & Specifications tables and notes below)
V XXXX LA XX X
P
OPTION CODES
(See notes below)
XXXXX
See OPTIONS CODES notes below
For “VARISTOR”
V M(AC)
(Three or four digits -- 130V to 1,000V)
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
SERIES + PACKAGING / LEAD STYLE
DESIGNATOR
(See BASE PART CODES notes below)
LA = Bulk Pack / Straight Leads (standard)
LC = Bulk Pack / Crimped and Trimmed Leads
LS = Tape and Reel / Straight Leads
LT = Tape and Reel / Crimped Leads
LU = Tape and Reel / Under-Crimped Leads
For standard parts, use the BASE PART designator only.
For parts with non-standard options (such as additional form, packaging
and lead space options), use BASE PART + OPTION CODE.
OPTION CODE items are subject to availability and minimum order
requirements. Please contact a Littelfuse products representative for
additional information or questions
RELATIVE ENERGY INDICATOR
(One or Two Digits)
CLAMP VOLTAGE VARIANT
(One digit, where applicable)
BASE PART CODES:
OPTION CODES:
Series + Packaging / Lead Style Designators:
X10: 10mm lead spacing option -For 10 (-/+1) mm lead spacing (available on 20mm
diameter models only), append standard model
BASE PART number with "X10." Example:
Ordering examples:
Straight
Lead
Bulk Pack
(standard)
Straight
Lead
Tape &
Reel
Crimped
Lead
Tape &
Reel
Crimped &
Trimmed
Lead
Bulk Pack
UnderCrimp
Lead
Tape &
Reel
V130LA2
V130LS2
V130LT2
V130LC2
V130LU2
LA Series
Ordering Notes:
Standard Model
Order As
V130LA20A
V130LA20AX10
X2855: Nickel Barrier coated wire option --
Crimped leads are standard on LA Series varistors supplied in
tape and reel, denoted with "LT." For crimped leads without
trimming and any varitions other than that described above,
please contact Littelfuse.
All standard parts use Tin–coated Copper wire. Nickel
Barrier coated wire is available as an option, consisting
of Copper wire with a flashing of Nickel followed by
a top coating of Tin. To order append standard model
BASE PART number with "X2855." Example:
Littelfuse LA Series varistors are shipped standard in bulk pack
with straight leads and lead spacing outlined in the Package
Dimensions section of this data sheet. Contact your Littelfuse
sales representative to discuss non-standard options.
Lead–free / RoHS Designator:
Standard Model
Order As
V130LA20A
V130LA20AX2855
X1347: Hi-Temperature phenolic coated option --
For Lead–free and RoHS compliant parts add "P" after the BASE
PART number and before any other OPTION CODE:
Standard Model
Order As
V130LA2
V130LA2P
Standard Model
with Option
Order As
V420LA20AX1347
V420LA20APX1347
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/la.html for current information.
Phenolic Coated LA Series devices are available with improved
maximum operating maximum temperature of 125°C.
For additional information see bottom of page 113.
To order, add X1347 to end of part number (V230LA20AX1347
or V230LA20APX1347 for Lead Free/RoHS version).
127
Revision: November 5, 2009
LA Varistor Series
Varistor Products
128
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Radial Lead Varistors > ZA Series
RoHS
ZA Varistor Series
Description
The ZA Series of transient voltage surge suppressors
are radial leaded varistors (MOVs) designed for
use in the protection of low and medium-voltage
circuits and systems. Typical applications include
motor control, telecom, automotive systems,
solenoid, and power supply circuits to protect circuit
board components and maintain data integrity.
These devices are available in five model sizes:
5mm, 7mm, 10mm, 14mm and 20mm, and feature
a wide VDC voltage range of 5.5V to 615V.
See ZA Series Device Ratings and Specifications
Table for part number and brand information.
Agency Approvals
Agency File Number
Features
E135010, (+ E320116 for selected parts)
116895E
42201-006
• Lead–free and RoHS
compliant option
available. Please see
the device and ratings
specifications table
for more information.
•
5 model sizes
available: 5, 7, 10,
14, and 20mm
•
Radial lead package for
hard-wired or printed
circuit board designs
•
Wide operating voltage
range VM(AC)RMS
4V to 460V
•
Available in tape and
reel or bulk pack
•
DC voltage ratings
5.5V to 615V
•
Standard lead
form options
•
No derating up to
85ºC ambient
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
ZA Series
Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
DC Voltage Range (VM(DC))
4 to 460
V
5.5 to 615
V
50 to 6500
A
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range (Note 1)
0.1 to 52
J
Operating Ambient Temperature Range (TA)
For 10/1000μs Current Wave (WTM)
-55 to +85
ºC
Storage Temperature Range (TSTG)
-55 to +125
ºC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
<0.01
%/ºC
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL–STD–202, Method 301)
2500
V
COATING Insulation Resistance
1000
MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
129
Revision: November 5, 2009
ZA Varistor Series
ZA Series
Agency
Varistor Products
Radial Lead Varistors > ZA Series
ZA Series Ratings & Specifications
Lead–free
and RoHS Compliant
Models
Part
Number
Branding
Maximum Rating (85°C)
Continuous
Transient
Standard
Models
Part
Number
Branding
Model
Size V
RMS
Disc
Dia.
(mm)
VM(AC)
VDC
Specifications (25°C)
Peak
Energy 10
Current
x 1000μs
8 x 20μs
VM(DC)
WTM
ITM
(J)
0.1
0.4
0.8
0.14
0.6
1.2
0.17
0.8
1.5
3.5
80
(A)
50
100
250
50
100
250
100
250
500
1000
V8ZA05P
V8ZA1P
V8ZA2P
V12ZA05P
V12ZA1P
V12ZA2P
V18ZA05P
V18ZA1P
V18ZA2P
V18ZA3P
PZ08
P08Z1
P08Z2
PZ12
P12Z1
P12Z2
PZ18
P18Z1
P18Z2
P18Z3
V8ZA05
V8ZA1
V8ZA2
V12ZA05
V12ZA1
V12ZA2
V18ZA05
V18ZA1
V18ZA2
V18ZA3
Z08
08Z1
08Z2
Z12
12Z1
12Z2
Z18
18Z1
18Z2
18Z3
5
7
10
5
7
10
5
7
10
14
(V)
4
4
4
6
6
6
10
10
10
10
(V)
5.5
5.5
5.5
8
8
8
14
14
14
14
V18ZA40P
P18Z40
V18ZA40
18Z40
20
10
14
V22ZA05P
V22ZA1P
V22ZA2P
V22ZA3P
PZ22
P22Z1
P22Z2
P22Z3
V22ZA05
V22ZA1
V22ZA2
V22ZA3
Z22
22Z1
22Z2
22Z3
5
7
10
14
14
14
14
14
V24ZA50P
P24Z50
V24ZA50
24Z50
20
14
18
18
18
18
18
0.2
0.9
2
4
100
(Note 4)
(Note 2)
V27ZA05P
V27ZA1P
V27ZA2P
V27ZA4P
PZ27
P27Z1
P27Z2
P27Z4
V27ZA05
V27ZA1
V27ZA2
V27ZA4
Z27
27Z1
27Z2
27Z4
5
7
10
14
17
17
17
17
22
22
22
22
0.25
1
2.5
5
100
250
500
1000
V27ZA60P
P27Z60
V27ZA60
27Z60
20
17
22
120 (Note 2)
2000
V33ZA05P
V33ZA1P
V33ZA2P
V33ZA5P
PZ33
P33Z1
P33Z2
P33Z5
V33ZA05
V33ZA1
V33ZA2
V33ZA5
Z33
33Z1
33Z2
33Z5
5
7
10
14
20
20
20
20
26
26
26
26
100
250
500
1000
V33ZA70P
P33Z70
V33ZA70
33Z70
20
21
27
0.3
1.2
3
6
150
V36ZA80P
P36Z80
V36ZA80
36Z80
20
23
31
V39ZA05P
V39ZA1P
V39ZA3P
V39ZA6P
V39ZA20P
V47ZA05P
V47ZA1P
V47ZA3P
V47ZA7P
V47ZA20P
V56ZA05P
V56ZA2P
V56ZA3P
V56ZA8P
V56ZA20P
V68ZA05P
V68ZA2P
PZ39
P39Z1
P39Z3
P39Z6
P39Z20
PZ47
P47Z1
P47Z3
P47Z7
P47Z20
PZ56
P56Z2
P56Z3
P56Z8
P56Z20
PZ68
P68Z2
V39ZA05
V39ZA1
V39ZA3
V39ZA6
V39ZA20
V47ZA05
V47ZA1
V47ZA3
V47ZA7
V47ZA20
V56ZA05
V56ZA2
V56ZA3
V56ZA8
V56ZA20
V68ZA05
V68ZA2
Z39
39Z1
39Z3
39Z6
39Z20
Z47
47Z1
47Z3
47Z7
47Z20
Z56
56Z2
56Z3
56Z8
56Z20
Z68
68Z2
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
5
7
25
25
25
25
25
30
30
30
30
30
35
35
35
35
35
40
40
31
31
31
31
31
38
38
38
38
38
45
45
45
45
45
56
56
ZA Varistor Series
(Note2)
(Note 2)
160
(Note 2)
130
Revision: November 5, 2009
0.3
1.2
3
7.2
20
0.4
1.8
4.5
8.8
23
0.5
2.3
5.5
10
30
0.6
3
2000
100
250
500
1000
2000
2000
2000
100
250
500
1000
2000
100
250
500
1000
2000
100
250
500
1000
2000
100
250
Typical
Maximum
CapaciVaristor Voltage at
Clamping
tance
1mA
Voltage
f=
DC Test Current
8 x 20μs
1MHz
VNOM
VNOM
IPK
C
VC
Min
Max
(V)
(V)
(V) (A)
(pF)
6
11
30
1
2000
6
11
22 2.5
4190
6
11
20
5
7000
9
16
37
1
1700
9
16
34 2.5
3350
9
16
30
5
6100
14.4
21.6
36
1
1400
14.4
21.6
36 2.5
2700
14.4
21.6
36
5
5300
14.4
21.6
36
10 18870
14.4
21.6
37
20 22000
(Note 3)
18.7
18.7
18.7
18.7
19.2
(Note 3)
23
23
23
23
23
(Note 3)
29.5
29.5
29.5
29.5
29.5
(Note 3)
32
(Note 3)
35
35
35
35
35
42
42
42
42
42
50
50
50
50
50
61
61
26
26
26
26
43
43
43
43
1
2.5
5
10
1220
2375
4500
14730
26
43
20
18000
31.1
31.1
31.1
31.1
53
53
53
53
1
2.5
5
10
920
1875
3850
11480
31.1
50
20
13000
38
36.5
36.5
36.5
65
65
65
65
1
2.5
5
10
790
1620
3495
9290
36.5
58
20
13000
40
63
20
12000
46
43
43
43
43
55
52
52
52
52
66
62
62
62
62
80
75
79
79
76
76
76
93
93
93
93
93
110
110
110
110
110
135
135
1
2.5
5
10
20
1
2.5
5
10
20
1
2.5
5
10
20
1
2.5
675
1350
3100
7000
12000
585
1245
2590
6270
11000
500
1035
2150
4840
10000
400
910
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
ZA Series Ratings & Specifications (Continued...)
Part
Number
V68ZA3P
V68ZA10P
V68ZA20P
V82ZA05P
V82ZA2P
V82ZA4P
V82ZA12P
V100ZA05P
V100ZA3P
V100ZA4P
V100ZA15P
V120ZA05P
V120ZA1P
V120ZA4P
V120ZA6P
V120ZA20P
V150ZA05P
V150ZA1P
V150ZA4P
V150ZA8P
V150ZA20P
V180ZA05P
V180ZA1P
V180ZA5P
V180ZA10P
V180ZA20P
V205ZA05P
V220ZA05P
†
V240ZA05P
†
V270ZA05P
†
V330ZA05P
†
V360ZA05P
†
V390ZA05P
†
V430ZA05P
†
V470ZA05P
†
V620ZA05P
†
V680ZA05P
†
V715ZA05P
†
V750ZA05P
Standard
Models
Branding
Part
Number
Branding
P68Z3
P68Z10
P68Z20
PZ82
P82Z2
P82Z4
P82Z12
PZ100
P100Z
P100Z4
P100Z15
PZ120
P120Z
P120Z4
P120Z6
P120Z20
PZ150
PZ051
P150Z4
P150Z8
P150Z20
PZ180
P180Z
P180Z5
P180Z10
P180Z20
PZ205
PZ220
PZ240
PZ270
PZ330
PZ360
PZ390
PZ430
PZ470
PZ620
PZ680
PZ715
PZ750
V68ZA3
V68ZA10
V68ZA20
V82ZA05
V82ZA2
V82ZA4
V82ZA12
V100ZA05
V100ZA3
V100ZA4
V100ZA15
V120ZA05
V120ZA1
V120ZA4
V120ZA6
V120ZA20
V150ZA05
V150ZA1
V150ZA4
V150ZA8
V150ZA20
V180ZA05
V180ZA1
V180ZA5
V180ZA10
V180ZA20
V205ZA05
V220ZA05
V240ZA05
V270ZA05
V330ZA05
V360ZA05
V390ZA05
V430ZA05
V470ZA05
V620ZA05
V680ZA05
V715ZA05
V750ZA05
68Z3
68Z10
68Z20
Z82
82Z2
82Z4
82Z12
Z100
100Z
100Z4
100Z15
Z120
120Z
120Z4
120Z6
120Z20
Z150
Z051
150Z4
150Z8
150Z20
Z180
180Z
180Z5
180Z10
180Z20
Z205
Z220
Z240
Z270
Z330
Z360
Z390
Z430
Z470
Z620
Z680
Z715
Z750
Model
Size V
RMS
Disc
Dia.
(mm)
VM(AC)
10
14
20
5
7
10
14
5
7
10
14
5
7
10
14
20
5
7
10
14
20
5
7
10
14
20
5
5
5
5
5
5
5
5
5
5
5
5
5
(V)
40
40
40
50
50
50
50
60
60
60
60
75
75
75
75
75
92
95
95
95
95
110
115
115
115
115
130
140
150
175
210
230
250
275
300
385
420
440
460
VDC
Specifications (25°C)
Peak
Energy 10
Current
x 1000μs
8 x 20μs
VM(DC)
WTM
ITM
(V)
56
56
56
68
68
68
68
81
81
81
81
102
102
102
102
102
127
127
127
127
127
153
153
153
153
153
170
180
200
225
275
300
330
369
385
505
560
585
615
(J)
6.5
13
33
2
4
8
15
2.5
5
10
20
3
6
12
22
33
4
8
15
20
45
5
10
18
35
52
5.5
6
7
7.5
9
9.5
10
11
12
13
14
15.5
17
(A)
500
1000
2000
400
1200
2500
4500
400
1200
2500
4500
400
1200
2500
4500
6500
400
1200
2500
4500
6500
400
1200
2500
4500
6500
400
400
400
400
400
400
400
400
400
400
400
400
400
Typical
Maximum
CapaciVaristor Voltage at
Clamping
tance
1mA
Voltage
f=
DC Test Current
8 x 20μs
1MHz
VNOM
VNOM
IPK
C
VC
Min
Max
(V)
(V)
(V) (A)
(pF)
61
75
135
5
1850
61
75
135 10
3870
61
75
135 20
9000
73
97
135
5
355
73
91
135 10
700
73
91
135 25
1485
73
91
145 50
3380
90
117
165
5
310
90
110
165 10
600
90
110
165 25
1200
90
110
175 50
2900
108
138
205
5
250
108
132
205 10
515
108
132
200 25
1100
108
132
210 50
2450
108
132
210 100 5000
135
173
250
5
190
135
165
250 10
460
135
165
250 25
860
135
165
250 50
1910
135
165
250 100 3500
162
207
295
5
100
162
198
300 10
320
162
198
300 25
465
162
198
300 50
1190
162
198
300 100 2400
184
226
340
5
100
198
253
360
5
95
216
264
395
5
90
243
311
455
5
75
297
380
540
5
70
324
396
595
5
60
351
449
650
5
80
387
495
710
5
75
420
517
775
5
70
558
682
1025 5
45
610
748
1120 5
40
643
787
1180 5
35
675
825
1240 5
30
Note:
1. Average power dissipation of transients not to exceed 0.2W, 0.25W, 0.4W, 0.6W or 1W for model sizes 5mm, 7mm, 10mm, 14mm and 20mm, respectively.
2. Energy rating for impulse duration of 30ms minimum to one half of peak current (auto Load Dump).
3. 10mA DC test current.
4. Also rated to withstand 24V for 5 minutes.
5. Higher voltages available, contact Littelfuse.
6. Capacitance Values shown are TYPICAL.
† Also Recognized to UL 1449, Transient Voltage Surge Suppressors File E320116
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
131
Revision: November 5, 2009
ZA Varistor Series
ZA Series
Lead–free
and RoHS Compliant
Models
Maximum Rating (85°C)
Continuous
Transient
Varistor Products
Radial Lead Varistors > ZA Series
Peak Pulse Current Test Waveform
Power Dissipation Ratings
PERCENT OF PEAK VALUE
100
PERCENT OF RATED VALUE
90
80
70
60
50
40
30
20
10
100
90
50
10
O1
0
-55
50
60
70
80
90
100
110
120
130
140
TIME
T1
AMBIENT TEMPERATURE ( oC)
Figure 1
T
150
T2
Figure 2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
Should transients occur in rapid succession, the average power
dissipation required is simply the energy (watt-seconds) per pulse
times the number of pulses per second. The power so developed
must be within the specifications shown on the Device Ratings
and Specifications Table for the specific device. Furthermore,
the operating values need to be derated at high temperatures as
shown in the diagram above. Because varistors can only dissipate
a relatively small amount of average power they are, therefore, not
suitable for repetitive applications that involve substantial amounts
of average power dissipation.
Maximum Clamping Voltage for 5mm Parts
V8ZA05(P) - V68ZA05(P)
V82ZA05(P) - V33ZA05(P)
2000
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
8 TO 68VN(DC) RATING
TA = -55oC TO 85oC
MAXIMUM PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
600
500
400
300
200
100
90
80
70
60
50
40
V68ZA05(P)
V56ZA05(P)
V47ZA05(P)
V39ZA05(P)
V33ZA05(P)
V27ZA05(P)
30 V22ZA05(P)
V18ZA05(P)
20 V12ZA05(P)
V330ZA05(P)
V270ZA05(P)
V240ZA05(P)
V220ZA05(P)
V205ZA05(P)
V180ZA05(P)
V150ZA05(P)
V120ZA05(P)
1000
500
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
82 TO 330VN(DC) RATING
TA = -55oC TO 85oC
)
(P
05
ZA
0
0
P)
V1
5(
A0
Z
2
V8
200
V8ZA05(P)
Figure 3
10
10-3
10-2
10-1
100
101
PEAK AMPERES (A)
102
100
0.0001
103
Figure 4
0.001
0.01
0.1
1
10
PEAK AMPERES (A)
100
1000
V360ZA05(P) - V750ZA05(P)
3000
MAXIMUM PEAK VOLTS (V)
2000
1000
MAX CLAMPING VOLTAGE
MODEL SIZE 5mm
360 TO 750VN(DC) RATING
TA = -55oC TO 85oC
V750ZA05(P)
V715ZA05(P)
V680ZA05(P)
V620ZA05(P)
V470ZA05(P)
V430ZA05(P)
V390ZA05(P)
V360ZA05(P)
500
Figure 5
0.0001
ZA Varistor Series
0.001
0.01
0.1
1
10
PEAK AMPERES (A)
100
1000
132
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
Maximum Clamping Voltage for 7mm Parts
V82ZA2(P) - V180ZA1(P)
V8ZA1(P) - V68ZA2(P)
500
400
300
4,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
8 TO 68VN(DC) RATING
TA = -55oC TO 85oC
3,000
2,000
MAXIMUM PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
200
100
90
80 V68ZA2(P)
70 V56ZA2(P)
60 V47ZA1(P)
50 V39ZA1(P)
40 V33ZA1(P)
V27ZA1(P)
30 V22ZA1(P)
V18ZA1(P)
20 V12ZA1(P)
V8ZA1(P)
10
10-3
10-2
Figure 6
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 7mm
82 TO 180VN(DC) RATING
TA = -55oC TO 85oC
1,000
900
800
700
600
500
400
V180ZA1(P)
V150ZA1(P)
V120ZA1(P)
V100ZA3(P)
V82ZA2(P)
300
200
10-1
100
101
PEAK AMPERES (A)
102
100
10-3
103
10-2
10-1
Figure 7
100
101
102
PEAK AMPERES (A)
103
104
103
104
103
104
Maximum Clamping Voltage for 10mm Parts
V82ZA4(P) - V180ZA5(P)
500
400
3,000
2,000
200
MAXIMUM PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
300
4,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
8 TO 68VN(DC) RATING
TA = -55oC TO 85oC
100
90
80
70
60
50
40
V68ZA3(P)
V56ZA3(P)
V47ZA3(P)
V39ZA3(P)
V33ZA2(P)
V27ZA2(P)
30 V22ZA2(P)
V18ZA2(P)
20
V12ZA2(P)
V8ZA2(P)
10
10-3
10-2
Figure 8
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 10mm
82 TO 180VN(DC) RATING
TA = -55oC TO 85oC
1,000
900
800
700
600
500
400
ZA Series
V8ZA2(P) - V68ZA3(P)
V180ZA5(P)
V150ZA4(P)
V120ZA4(P)
V100ZA4(P)
V82ZA4(P)
300
200
10-1
100
101
PEAK AMPERES (A)
102
100
10-3
103
10-2
10-1
Figure 9
100
101
102
PEAK AMPERES (A)
Maximum Clamping Voltage for 14mm Parts
V82ZA12(P) - V180ZA10(P)
V18ZA3(P) - V68ZA10(P)
MAXIMUM PEAK VOLTS (V)
300
4,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
18 TO 68VN(DC) RATING
TA = -55oC TO 85oC
3,000
2,000
MAXIMUM PEAK VOLTS (V)
600
500
400
200
100
90
80
70
60
50
40
V68ZA10(P)
V56ZA8(P)
V47ZA7(P)
V39ZA6(P)
V33ZA5(P)
V27ZA4(P)
30 V22ZA3(P)
V18ZA3(P)
20
10-3
10-2
Figure 10
10-1
100
101
PEAK AMPERES (A)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
102
1,000
900
800
700
600
500
400
300
Figure 11
133
Revision: November 5, 2009
V180ZA10(P)
V150ZA8(P)
V120ZA6(P)
V100ZA15(P)
V82ZA12(P)
200
100
10-3
103
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 14mm
82 TO 180VN(DC) RATING
TA = -55oC TO 85oC
10-2
10-1
100
101
102
PEAK AMPERES (A)
ZA Varistor Series
Varistor Products
Radial Lead Varistors > ZA Series
Maximum Clamping Voltage for 20mm Parts
V39ZA20(P) - V180ZA20(P)
V18ZA40(P) - V36ZA80(P)
300
MAXIMUM PEAK VOLTS (V)
200
MAXIMUM PEAK VOLTS (V)
1,000
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
18 TO 36VN(DC) RATING
TA = -55oC TO 85oC
V36ZA80(P)
V33ZA70(P)
V27ZA60(P)
V24ZA50(P)
V18ZA40P(P)
100
90
80
70
60
50
40
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 20mm
39 TO 180VM(AC) RATING
500 TA = -55oC TO 85oC
V180ZA20(P)
V150ZA20(P)
V120ZA20(P)
300
200
V68ZA20(P)
V56ZA20(P)
V47ZA20(P)
V39ZA20(P)
100
50
30
30
20
10-3
10-2
10-1
Figure 11
100
101
102
PEAK AMPERES (A)
103
10-3
104
10-2
10-1
100
101
PEAK AMPERES (A)
Figure 12
102
103
104
Repetitive Surge Capability for 5mm Parts
V8ZA05(P)
V12ZA05(P) - V68ZA05(P)
100
50
MODEL SIZE 5mm
V8ZA05(P)
1
104 5
10 6
10
2
10
10
5 102
103
2
1
0.5
20
102
10
103
MODEL SIZE 5mm
V12ZA05(P) - V68ZA05(P)
1
INDEFINITE
0.2
INDEFINITE
0.1
20
104 5
10 6
10
2
0.5
0.2
10
50
SURGE CURRENT (A)
SURGE CURRENT (A)
20
1
2
100
Figure 13
1,000
IMPULSE DURATION ( μs)
0.1
20
10,000
Figure 14
100
1,000
IMPULSE DURATION ( μs)
10,000
V82ZA05(P) - V750ZA05(P)
500
1
SURGE CURRENT (A)
200
103 4
10 5
10 6
10
2
100
10
50
102
MODEL SIZE 5mm
V82ZA05(P) - V750ZA05(P)
20
10
5
2
INDEFINITE
1
0.5
0.2
20
Figure 15
ZA Varistor Series
100
1,000
IMPULSE DURATION ( μs)
10,000
134
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
Repetitive Surge Capability for 7mm Parts
Repetitive Surge Capability for 10mm Parts
V8ZA2(P) - V127ZA2(P)
V8ZA1(P) - V12ZA1(P)
500
200
200
102
20
103
10
5
2
1
INDEFINITE
20
100
1,000
IMPULSE DURATION ( μs)
50
103
20
10
5
2
0.2
10,000
INDEFINITE
20
100
Figure 18
1,000
IMPULSE DURATION ( μs)
1,000
500
200
2
10
MODEL SIZE 7mm
V18ZA1(P) - V68ZA2(P)
104
105
2
106
200
SURGE CURRENT (A)
102
50
103
20
10
5
2
MODEL SIZE 10mm
V18ZA2(P) - V68ZA3(P)
1
500
104
105
106
100 102
3
50 10
ZA Series
1
100
10,000
V18ZA2(P) - V68ZA3(P)
V18ZA1(P) - V68ZA2(P)
SURGE CURRENT (A)
102
0.5
Figure 15
20
10
INDEFINITE
INDEFINITE
5
1
0.5
0.2
10
MODEL SIZE 10mm
V8ZA2(P) - V12ZA2(P)
1
0.5
0.2
104 5
10 6
10
2
100
SURGE CURRENT (A)
10
50
SURGE CURRENT (A)
104 5
10 6
10
2
1
MODEL SIZE 7mm
V8ZA1(P) - V12ZA1(P)
1
100
2
1
20
100
Figure 16
1,000
IMPULSE DURATION ( μs)
20
10,000
100
Figure 19
V82ZA2(P) - V180ZA1(P)
1,000
IMPULSE DURATION ( μs)
10,000
V82ZA4(P) - V180ZA5(P)
2,000
MODEL SIZE 7mm
V82ZA2(P) - V180ZA1(P)
1
1,000
103
104
105
106
SURGE CURRENT (A)
10
102
100
20
10
INDEFINITE
Figure 17
104 5
10 6
10
10
500
200
102
103
100
50
20
10
INDEFINITE
5
2
1
20
2
1,000
50
5
MODEL SIZE 10mm
V82ZA4(P) - V180ZA5(P)
1
2,000
SURGE CURRENT (A)
500
200
5,000
2
100
1,000
IMPULSE DURATION ( μs)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
2
20
10,000
Figure 20
135
Revision: November 5, 2009
100
1,000
IMPULSE DURATION ( μs)
10,000
ZA Varistor Series
Varistor Products
Radial Lead Varistors > ZA Series
Repetitive Surge Capability for 14mm Parts
V82ZA12(P) - V180ZA10(P)
V18ZA3(P) - V68ZA10(P)
1
2
500
10
200 102
SURGE CURRENT (A)
5,000
MODEL SIZE 14mm
103
V18ZA3(P) - V68ZA10(P)
104
5
10
106
SURGE CURRENT (A)
1,000
100
50
20
10
INDEFINITE
5
1
2,000
2
1,000
10
MODEL SIZE 14mm
V82ZA12(P) - V180ZA10(P)
102 3
10
104
105
106
500
200
100
50
20
INDEFINITE
10
5
2
1
20
100
Figure 21
1,000
IMPULSE DURATION ( μs)
2
20
10,000
100
1,000
IMPULSE DURATION ( μs)
Figure 22
10,000
Repetitive Surge Capability for 20mm Parts
V18ZA40(P) - V68ZA20(P)
2,000
2
1
10
500
102
200
103
100
104
50
105
10,000
5,000
MODEL SIZE 20mm
V18ZA40(P) - V68ZA20(P)
20
10
INDEFINITE
Figure 23
10
1,000
500
102
103
200
104
105
106
100
50
20
10
INDEFINITE
5
5
2
20
MODEL SIZE 20mm
V120ZA20(P) - V180ZA20(P)
1
2
2,000
106
SURGE CURRENT (A)
SURGE CURRENT (A)
1,000
V120ZA20(P) - V180ZA20(P)
2
1
100
1,000
IMPULSE DURATION ( μs)
10,000
Figure 24
20
100
1,000
10,000
IMPULSE DURATION ( μs)
NOTE: If pulse ratings are exceeded, a shift of VN(DC)(at specified current) of more then +/-10% could result. This type of shift, which normally results
in a decrease of VN(DC), may result in the device not meeting the original published specifications, but does not prevent the device from continuing to
function, and to provide ample protection.
ZA Varistor Series
136
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
Wave Solder Profile
Non Lead–free Profile
Lead–free Profile
300
300
250
TEMPERATURE (ºC)
250
200
150
100
200
150
100
50
50
0
0
0
0.5
1
Figure 25
1.5
2
2.5
3
3.5
0
4
0.5
1
1.5
Figure 26
TIME(MINUTES)
2
2.5
3
3.5
4
TIME(MINUTES)
Physical Specifications
Environmental Specifications
Lead Material
Tin–Coated Copper Wire
Operating Ambient
Temperature Range
-55°C to +85°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Storage Temperature Range
-55°C to +125°C
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Humidity Aging
+85°C, 85% RH,1000 hours
+/-10% typical voltage change
Device Labeling
Marked with LF, voltage, UL/CSA logos,
and date code
Thermal Shock
+85°C to -40°C 10 times
+/-10% typical voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
ZA Series Varistors for Hi-Temperature Operating Conditions:
•
Phenolic coated ZA Series devices are available with improved maximum operating temperature of 125°C
•
These devices also have improved temperature cycling performance capability
•
Ratings and specifications are as per standard ZA Series except Hi–Pot
Encapsulation (Isolation Voltage Capability) = 500V
•
To order: add 'X1347' to part number (e.g. V22ZA3X1347)
•
These devices are not UL, CSA, VDE or CECC certified
•
Contact factory for further details
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
137
Revision: November 5, 2009
ZA Varistor Series
ZA Series
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
Varistor Products
Radial Lead Varistors > ZA Series
Product Dimensions (mm)
CRIMPED AND TRIMMED LEAD
Radial lead types can be supplied with combination
preformed crimp and trimmed leads. This option is
supplied to the dimensions shown.
*Seating plane interpretation per IEC-717
To order this crimped and trimmed lead style, standard radial type model numbers are changed
by replacing the model letter "ZA" with "ZC." This option is supplied in bulk only.
Example:
Standard Model
Order As
V18ZA3
V18ZC3
For crimped leads without trimming and any varitions to
the above, contact Littelfuse.
5mm Size
7mm Size
10mm Size
14mm Size
20mm Size
Dimension
VRMS
Voltage
Model
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
Min.
mm (in)
Max.
mm (in)
A
All
-
10 (0.394)
-
12 (0.472)
-
16 (0.630)
-
20 (0.787)
-
26.5
(1.043)
ØD
All
-
7 (0.276)
-
9 (0.354)
-
12.5 (0.492)
-
17 (0.669)
-
23 (0.906)
e
6.5 (0.256) 8.5 (0.335)
All
4 (0.157)
6 (0.236)
4 (0.157)
6 (0.236) 6.5 (0.256) 8.5 (0.335) 6.5 (0.256) 8.5 (0.335)
V8ZAV56ZA
1 (0.039)
3 (0.118)
1 (0.039)
3 (0.118)
V68ZAV100ZA
1.5 (0.059)
3.5
(0.138)
1.5 (0.059)
3.5
(0.138)
V120ZAV180ZA
1 (0.039)
3 (0.118)
1 (0.039)
3 (0.118)
1 (0.039)
3 (0.118)
1 (0.038)
3 (0.118)
1 (0.038)
3 (0.118)
V205ZAV750ZA
1.5 (0.059)
3.5
(0.138)
-
-
-
-
-
-
-
-
V8ZAV56ZA
-
5 (0.197)
-
5 (0.197)
-
5 (0.197)
-
5 (0.197)
-
5 (0.197)
V68ZAV100ZA
-
5.6
(0.220)
-
5.6
(0.220)
-
5.6 (0.220)
-
5.6
(0.220)
-
5.6 (0.220)
V120ZAV180ZA
-
5 (0.197)
-
5 (0.197)
-
5 (0.197)
-
5 (0.197)
-
5 (0.197)
V205ZAV750ZA
-
5.6
(0.220)
-
-
-
-
-
-
-
-
Øb
All
0.585
(0.023)
0.685
(0.027)
0.585
(0.023)
0.685
(0.027)
0.76
(0.030)
0.86
(0.034)
0.76
(0.030)
0.86
(0.034)
0.76
(0.030)
0.86
(0.034)
A
All
-
13.0
(0.512)
-
15 (0.591)
-
19.5 (0.768)
-
22.5
(0.886)
-
29.0
(1.142)
LTRIM
All
2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
2.41
(0.095)
4.69
(0.185)
(see notes
below)
e1
E
1 (0.039)
3 (0.118)
1 (0.039)
1.5 (0.059) 3.5 (0.138) 1.5 (0.059)
3 (0.118)
3.5
(0.138)
(note 1 below) (note 1 below)
1 (0.039)
3 (0.118)
1.5 (0.059) 3.5 (0.138)
NOTES: Dimensions in millimeters, inches in parentheses.
1. For 20mm size devices, a 10mm "e" dimension option is also available. Please refer to "Ordering Notes" section "X10" option code for additional information.
2. V24ZA50(P) and V24ZC50(P) only supplied with lead spacing of 6.35mm -/+0.5mm (0.25 -/+0.0196) Dimension e = 5.85 min. Does not apply to Tape and Reel parts.
ZA Varistor Series
138
Revision: November 5, 2009
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
Tape and Reel Specifications
5 and 7mm Devices
10, 14 and 20mm Devices
CRIMPED LEADS "ZT"
P
P2
CRIMPED LEADS "ZT"
E
DP
P2
DP
H0
DP
DH
DH
C
SEATING
PLANE
H1
W0
E
DP
C
SEATING
PLANE
H1
P
DH
DH
W2 W1
W0 W2 W1
Db
Db
H0
W
W
DD0
DD0
P1
t
F
P1
P0
t
F
P1
STRAIGHT LEADS "ZS"
P
P2
P
P2
DP
E
DP
E
DP
DH
DH
ZA Series
STRAIGHT LEADS "ZS"
DP
DH
DH
H1
H1
W0 W2 W1
H
Db
W0 W2 W1
H
Db
W
W
DD0
DD0
P1
P1
t
F
P0
P0
UNDER CRIMPED LEADS "ZU"
P
P2
UNDER CRIMPED LEADS "ZU"
E
DP
P2
E
DP
DP
DH
DH
DH
DH
U
U
H1
W0 W2 W1
Ho
P
DP
H1
t
F
W0 W2 W1
Ho
Db
Db
W
W
DD0
DD0
P1
F
t
P1
F
t
P0
P0
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
139
Revision: November 5, 2009
ZA Varistor Series
Varistor Products
Radial Lead Varistors > ZA Series
Tape and Reel Specifications
•
•
•
•
Conforms to ANSI and EIA specifications
Can be supplied to IEC Publication 286-2
Radial devices on tape are supplied with crimped leads, straight leads, or under-crimped leads
5mm parts are available on tape and reel up to 385 VAC only
NOTE: Leads are offset by Dim e1
SYMBOL
DESCRIPTION
5mm
7mm
MODEL SIZE
10mm
14mm
20mm
P
Pitch of Component
12.7 +/- 1.0
12.7 +/- 1.0
25.4 +/- 1.0
25.4 +/- 1.0
25.4 +/- 1.0
P0
Feed Hole Pitch
12.7 +/- 0.2
12.7 +/- 0.2
12.7 +/- 0.2
12.7 +/- 0.2
12.7 +/- 0.2
P1
Feed Hole Center to Pitch
3.85 +/- 0.7
3.85 +/- 0.7
8.85 +/- 0.7
8.85 +/- 0.7
8.85 +/- 0.7
P2
Hole Center to Component Center
6.35 +/- 1.0
6.35 +/- 1.0
12.7 +/- 0.7
12.7 +/- 0.7
12.7 +/- 0.7
F
Lead to Lead Distance
5.0 +/- 1.0
5.0 +/-1.0
7.5 +/- 1.0
7.5 +/- 1.0
7.5 +/- 1.0
h
Component Alignment
2.0 Max
2.0 Max
2.0 Max
2.0 Max
2.0 Max
W
Tape Width
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
18.0 +1.0 / -0.5
W0
Hold Down Tape Width
12.0 +/- 0.3
12.0 +/- 0.3
12.0 +/- 0.3
12.0 +/- 0.3
12.0 +/- 0.3
W1
Hole Position
W2
Hold Down Tape Position
H
Height from Tape Center to
Component Base
H0
Seating Plane Height
H1
Component Height
9.0 +0.75 / -0.50 9.0 +0.75 / -0.50 9.0 +0.75 / -0.50 9.0 +0.75 / -0.50 9.0 +0.75 / -0.50
0.5 Max
0.5 Max
0.5 Max
0.5 Max
0.5 Max
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
18.0 +2.0 / -0.0
16.0 +/- 0.5
16.0 +/- 0.5
16.0 +/- 0.5
16.0 +/- 0.5
16.0 +/- 0.5
29.0 Max
32.0 Max
36.0 Max
40.0 Max
46.5 Max
D0
Feed Hole Diameter
4.0 +/- 0.2
4.0 +/- 0.2
4.0 +/- 0.2
4.0 +/- 0.2
4.0 +/- 0.2
t
Total Tape Thickness
0.7 +/- 0.2
0.7 +/- 0.2
0.7 +/- 0.2
0.7 +/- 0.2
0.7 +/- 0.2
U
Undercrimp Width
8.0 Max
8.0 Max
8.0 Max
8.0 Max
8.0 Max
p
Component Alignment
3° Max
3º Max
3° Max
3° Max
3° Max
ZA Varistor Series
140
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Varistor Products
Radial Lead Varistors > ZA Series
Part Numbering System
BASE PART CODES
(See Ratings & Specifications tables and notes below)
V XXX ZA XX
P
OPTION CODES
(See notes below)
XXXXX
See OPTIONS CODES notes below
For “VARISTOR”
NOMINAL VOLTAGE (V NOM )
(One, Two or Three Digits)
P: LEAD-FREE AND RoHS
COMPLIANT OPTION
SERIES + PACKAGING / LEAD STYLE
DESIGNATOR
(See BASE PART CODES notes below)
ZA = Bulk Pack / Straight Leads (standard)
ZC = Bulk Pack / Crimped and Trimmed Leads
ZS = Tape and Reel / Straight Leads
ZT = Tape and Reel / Crimped Leads
ZU = Tape and Reel / Under-Crimped Leads
For standard parts, use the BASE PART designator only.
For parts with non-standard options (such as additional form, packaging
and lead space options), use BASE PART + OPTION CODE.
OPTION CODE items are subject to availability and minimum order
requirements. Please contact a Littelfuse products representative for
additional information or questions
RELATIVE ENERGY INDICATOR
(One or Two Digits)
BASE PART CODES:
OPTION CODES:
Series + Packaging / Lead Style Designators:
X10: 10MM LEAD SPACING OPTION -For 10 -/+1 mm (0.394-/+0.039 in) lead spacing (available
on 20mm diameter models only), append standard
model BASE PART number with "X10." Example:
Ordering examples:
Straight
Lead
Bulk Pack
(standard)
Straight
Lead
Tape &
Reel
Crimped
Lead
Tape &
Reel
V18ZA3
V18ZS3
V18ZT3
Crimped &
UnderTrimmed Crimp Lead
Lead
Tape &
Bulk Pack
Reel
V18ZC3
Standard Model
Order As
V18ZA40
V18ZA40X10
V18ZU3
X2855: Nickel Barrier COATED WIRE OPTION --
Crimped lead ZA Series varistors are supplied standard in tape and
reel, denoted with "ZT."
All standard parts use Tin–Coated Copper wire. Nickel
Barrier Coated wire is available as an option, consisting
of Copper wire with a flashing of Nickel followed by
a top coating of Tin. To order append standard model
BASE PART number with "X2855." Example:
"ZC" style is supplied in bulk only.
"ZU" style is supplied in tape and reel only.
For crimped leads without trimming and any varitions other than that
described above, please contact Littelfuse.
Lead–free / RoHS Designator:
Order As
V18ZA40
V18ZA40P
Standard Model
with Option
Order As
V18ZA40X10
V18ZA40PX10
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za.html for current information.
Order As
V18ZA40
V18ZA40X2855
TAPE & REEL QUANTITIES:
For Lead–free and RoHS compliant parts add "P" after the BASE
PART number and before any other OPTION CODE:
Standard Model
Standard Model
Littelfuse ZA Series varistors are shipped standard in bulk pack
with straight leads and lead spacing outlined in the Package
Dimensions section of this data sheet. Contact your Littelfuse
sales representative to discuss non-standard options.
Device Size
Voltage
5mm
7mm
10mm
14mm
20mm
All
All
All
< 300V
< 300V
141
Revision: November 5, 2009
"S" Reel
1000
1000
500
500
500
Quantity Per Reel
"T" Reel
"U" Reel
1000
1000
1000
1000
500
500
500
500
500
400
ZA Varistor Series
ZA Series
Ordering Notes:
Varistor Products
142
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Industrial High Energy Terminal Varistors > BA/BB Series
BA/BB Varistor Series
RoHS
Description
BB Series
The BA and BB Series transient surge suppressors are
heavy-duty industrial Metal-Oxide Varistors (MOVs)
designed to provide surge protection for motor
controls and power supplies used in oil-drilling, mining,
transportation equipment and other heavy industrial AC line
applications.
These UL– recognized varistors have similar package
construction but differ in size and ratings. The BA models
are rated from 130 to 880VM(AC). The BB models from 1100
to 2800VM(AC).
BA Series
Both the BA and BB Series feature improved creep and
strike capability to minimize breakdown along the package
surface, a package design that provides complete electrical
isolation of the disc subassembly, and rigid terminals to
ensure secure wire contacts.
Agency Approvals
Agency
Agency File Number
E320116 - for BA Series only.
See BA/BB Series Device Ratings and Specifications Table
for part number and brand information.
•
RoHS compliant and
Lead–free available
•
Rigid terminals for
secure wire contact
•
High energy absorption
capability WTM
•
Case design provides
complete electrical
isolation of disc
subassembly
•
Littelfuse largest
packaged disc
60mm diameter
•
No derating up to
85ºC ambient
BA Series 3200J
BB Series 10,000J
•
Wide operating voltage
range VM(AC)RMS
BA Series 130V to 880V
BB Series 1100V to 2800V
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
BA Series
DC Voltage Range (VM(DC))
BB Series
Units
130 to 880
1100 to 2800
V
175 to 1150
1400 to 3500
V
50,000 to 70,000
70,000
A
450 to 3200
-55 to +85
-55 to +125
<0.01
3800 to 10000
-55 to +85
-55 to +125
<0.01
J
C
O
C
%/OC
5000
5000
V
1000
1000
MΩ
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range
For 2ms Current Squarewave (WTM)
Operating Ambient Temperature Range (TA)
Storage Temperature Range (TSTG)
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL–STD–202, Method 301)
COATING Insulation Resistance
O
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only
rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specification is
not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
143
Revision: November 5, 2009
BA/BB Varistor Series
HI–ENERGY
BA/BBMOV’S
Series
Features
Varistor Products
Industrial High Energy Terminal Varistors > BA/BB Series
BA/BB Series Ratings & Specifications
Maximum Rating (85°C)
Continuous
Part
Number
BA Series
V131BA60
V151BA60
V251BA60
Specifications (25°C)
Transient
Varistor Voltage at 1mA
DC Test Current
Maximum
Clamping Volt
VC at 200A
Current (8/20μs)
Typical
Capacitance f =
1MHz
VRMS
VDC
Energy
(2ms)
Peak
Current
8 x 20μs
VM(AC)
VM(DC)
WTM
ITM
Min
VN(DC)
Max
VC
C
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(V)
(pF)
130
150
250
175
200
330
450
530
880
50000
50000
50000
184
212
354
200
240
390
228
268
429
340
400
620
20000
16000
10000
V271BA60
275
369
950
50000
389
430
473
680
9000
V321BA60
V421BA60
V481BA60
V511BA60
V571BA60
V661BA60
V751BA60
V881BA60
320
420
480
510
575
660
750
880
420
560
640
675
730
850
970
1150
1100
1500
1600
1800
2100
2300
2600
3200
50000
70000
70000
70000
70000
70000
70000
70000
462
610
670
735
805
940
1080
1290
510
680
750
820
910
1050
1200
1500
561
748
825
910
1000
1160
1320
1650
760
1060
1160
1300
1420
1640
1880
2340
7500
6000
5500
5000
4500
4000
3500
2700
BB Series
V112BB60
V142BB60
V172BB60
V202BB60
V242BB60
V282BB60
1100
1400
1700
2000
2400
2800
1400
1750
2150
2500
3000
3500
3800
5000
6000
7500
8600
10000
70000
70000
70000
70000
70000
70000
1620
2020
2500
2970
3510
4230
1800
2200
2700
3300
3900
4700
2060
2550
3030
3630
4290
5170
2940
3600
4300
5200
6200
7400
2200
1800
1500
1200
1000
800
NOTE: Average power dissipation of transients not to exceed 2.5W. See Figures 3 and 4 for more information on power dissipation.
BA/BB Varistor Series
144
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > BA/BB Series
Peak Pulse Current Test Waveform
PERCENT OF PEAK VALUE
Power Dissipation Ratings
90
80
70
60
50
40
30
20
90
50
10
O1
10
0
-55
100
50
60
70
80
90
100
110
120
130
140 150
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
Figure 26
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
Typical Stability of Standby Power Dissipation at Rated
VRMS vs Time
Stand by Power Dissipation vs Applied VRms at Varied
Temperatures
TYPICAL TEMPERATURE COEFFICIENT
OF POWER DISSIPATION = 2.2%/ oC
0.5
0.6
POWER DISSIPATION (W) PER kV
OF RATED V RMS
POWER DISSIPATION (W) PER kV
OF RATED V RMS
1,000 HOURS, TA = 85oC
MAX AT TA = 85oC
0.4
0.2
MAX AT TA = 25oC
0.1
0.08
TYP AT TA = 25oC
0.06
0.04
80
T2
Figure 2
Should transients occur in rapid succession, the average power
dissipation required is simply the energy (watt-seconds) per pulse
times the number of pulses per second. The power so developed
must be within the specifications shown on the Device Ratings
and Characteristics Table for the specific device. Furthermore,
the operating values need to be derated at high temperatures as
shown in the above diagram. Because varistors can only dissipate
a relatively small amount of average power they are, therefore, not
suitable for repetitive applications that involve substantial amounts
of average power dissipation.
1.0
0.8
TIME
T1
AMBIENT TEMPERATURE ( oC)
Figure 1
T
90
100
110
Figure 3
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
0.3
0.2
0.1
0
PERCENTAGE OF MAXIMUM RATED V RMS (%)
©2009 Littelfuse, Inc.
0.4
Figure 4
145
Revision: November 5, 2009
0
10
100
TIME AT RATED V RMS (HOURS)
1,000
BA/BB Varistor Series
HI–ENERGY
BA/BBMOV’S
Series
PERCENT OF RATED VALUE
100
Varistor Products
Industrial High Energy Terminal Varistors > BA/BB Series
Maximum Clamping Voltage BA Series
Maximum Clamping Voltage BB Series
V131BA60 - V881BA60
30,000
MAX CLAMPING VOLTAGE
DISC SIZE 60mm
130 TO 880VM(AC) RATING
TA = -55oC TO 85oC
3,000
V511BA60
V481BA60
V421BA60
V881BA60
V751BA60
V661BA60
V571BA60
1,000
900
800
700
600 V321BA60
500 V271BA60
V251BA60
V112BB60
10 -1
10 0
Figure 5
10 1
10 2
10 3
PEAK AMPERES (A)
10 4
2,000
10 -2
10 5
100,000
2
10
DISC SIZE 60mm
V131BA60 - V321BA60
20,000
10 3
1,000
10 4
10 5
200
100
10 5
2
10
10 6
10 2
5,000
2,000
10 3
1,000
10 4
500
10 5
200
10 6
100
50
50
20
10 4
10,000
SURGE CURRENT (A)
SURGE CURRENT (A)
2,000
10 3
DISC SIZE 60mm
V421BA60 - V282BB60
1
50,000
10,000
5,000
10 1
10 2
PEAK AMPERES (A)
V421BA60 - V282BB60
1
10 2
10 0
Repetitive Surge Capability BB Series
V131BA60 - V321BA60
50,000
10 -1
Figure 6
Repetitive Surge Capability BA Series
500
V282BB60
5,000 V242BB60
4,000 V202BB60
3,000 V142BB60
300 V151BA60
V131BA60
20,000
10,000
9,000
8,000
7,000
6,000
V172BB60
400
200
10 -2
MAX CLAMPING VOLTAGE
DISC SIZE 60mm
1100 TO 2800VM(AC) RATING
TA = -55oC TO 85oC
20,000
MAX PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
6,000
5,000
4,000
2,000
V112BB60 - V282BB60
INDEFINITE
10
20
Figure 7
20
INDEFINITE
10
100
1,000
IMPULSE DURATION (μs)
20
10,000
100
1,000
10,000
IMPULSE DURATION ( μs)
Figure 8
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than +/-10% could result.This type of shift, which normally results in a decrease of VN(DC), may result in
the device not meeting the original published specifications, but it does not prevent the device from continuing to function, and to provide ample protection.
Physical Specifications
Environmental Specifications
Lead Material
BA / BB – Copper with Tin Plating
Operating/Storage
Temperature
-55°C to +85°C/
-55°C to +125°C
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Humidity Aging
+85°C, 85% RH, 1000 hours
+/- 5% typical resistance
change
Device Labeling
Marked with LF, Part Number and Date
code
Thermal Shock
+85°C to -40°C 10 times
+/- 5% typical resistance
change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
BA/BB Varistor Series
146
Revision: November 5, 2009
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > BA/BB Series
Dimensions
40±2
(1.575 ± 0.08)
BA Series
M6 INTERNATIONAL
THREAD
40.0 (1.575)
M6 INTERNATIONAL THREAD
PAN HEAD SLOTTED SCREW
23.5
(0.925)
7.0
(0.28)
86.0 (3.38)
95 (3.74)
MAX
100 (3.94)
79±3
(3.11±0.12)
BB Series
40.0 (1.575)
M6 INTERNATIONAL THREAD
PAN HEAD SLOTTED SCREW
6 (0.24)
10.5
(0.41)
86±2
(3.38±0.08)
100 (3.94)
44.5
(1.752)
9.5
(0.375)
Notes:
Typical weight: BA Series:250g and BB Series: 600g
Dimensions are in mm; inches in parentheses for reference only.
10.5
(0.41)
86.0 (3.38)
100 (3.94)
Part Numbering System
V XX X BA 60
VARISTOR
DISC SIZE (60mm)
VM(AC)
SERIES DESIGNATOR
First Two Significant Digits*
BA or BB
VM(AC)
HI–ENERGY
BA/BBMOV’S
Series
Decade Multiplier*
(1 or 2)
*Refer to Rating & Specifications table
Examples:
130 VM(AC) = 131
2800 VM(AC) = 282
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ba or /bb.html for current information.
147
Revision: November 5, 2009
BA/BB Varistor Series
Varistor Products
148
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series
DA/DB Varistor Series
RoHS
Description
DA SERIES
The DA and DB Series transient surge suppressors
are heavy-duty industrial Metal-Oxide Varistors
(MOVs) designed to provide surge protection for
motor controls and power supplies used in oildrilling, mining, and transportation equipment.
These UL recognized varistors have identical ratings
and specifications but differ in case construction
to provide flexibility in equipment designs.
DB SERIES
DA Series devices feature rigid terminals to ensure
secure wire contacts. Both the DA and DB Series feature
improved creep and strike distance capability to minimize
breakdown along the package surface design that provides
complete electrical isolation of the disc subassembly.
Agency Approvals
Agency
Agency File Number
See DA/DB Series Device Ratings and Specifications
table for part number and brand information.
E320116
•
RoHS compliant
and Lead–free
•
High energy
absorption capability
WTM up to 1050J
•
Wide operating
voltage range
VM(AC)RMS 130V to 750V
•
Screw terminals (DA
Series),quick connect
push-on connectors
(DB Series)
•
Case design provides
complete electrical
isolation of disc
subassembly
•
40mm diameter disc
•
No derating up to
85ºC ambient
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
DA/DB Series
Units
AC Voltage Range (VM(AC)RMS)
130 to 750
V
DC Voltage Range (VM(DC))
175 to 970
V
40,000
A
Steady State Applied Voltage:
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range
270 to 1050
J
Operating Ambient Temperature Range (TA)
For 2ms Current Squarewave (WTM)
-55 to +85
ºC
Storage Temperature Range (TSTG)
-55 to +125
ºC
<0.01
%/ºC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
COATING Insulation Resistance
5000
V
1000
MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This
is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/da or /db.html for current information.
149
Revision: November 5, 2009
DA/DB Varistor Series
HI–ENERGY
DA/DBMOV’S
Series
Features
Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series
DA/DB Series Ratings & Specifications
Maximum Rating (85ºC)
Continuous
Part Number
Device Branding
Specifications (25ºC)
Transient
VRMS
VDC
Energy
(2ms)
Peak
Current
8 x 20μs
VM(AC)
VM(DC)
WTM
ITM
Varistor Voltage at 1mA
DC Test Current
Min
VNOM
Maximum
Clamping
Volt VC at
200A Current
(8/20μs)
Typical
Capacitance f =
1MHz
VC
C
Max
DA
DB
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(A)
(pF)
V131DA40
V131DB40
130
175
270
400001
184
200
228
345
10000
V151DA40
V151DB40
150
200
300
400002
212
240
268
405
8000
V251DA40
V251DB40
250
330
370
40000
354
390
429
650
5000
V271DA40
V271DB40
275
369
400
40000
389
430
473
730
4500
V321DA40
V321DB40
320
420
460
40000
462
510
561
830
3800
V421DA40
V421DB40
420
560
600
40000
610
680
748
1130
3000
V481DA40
V481DB40
480
640
650
40000
670
750
825
1240
2700
V511DA40
V511DB40
510
675
700
40000
735
820
910
1350
2500
V571DA40
V571DB40
575
730
770
40000
805
910
1000
1480
2200
V661DA40
V661DB40
660
850
900
40000
940
1050
1160
1720
2000
V751DA40
V751DB40
750
970
1050
40000
1080
1200
1320
2000
1800
Note : Average power dissipation of transients not to exceed 2.0W.
Power Dissipation Ratings
PERCENT OF PEAK VALUE
Peak Pulse Current Test Waveform
PERCENT OF RATED VALUE
100
90
80
70
60
50
40
30
20
10
0
-55
100
90
50
10
O1
50
Figure 1
60
70
80
90
100
110
120
130
140
AMBIENT TEMPERATURE ( oC)
Figure 2
NOTES:
1. Peak current Applies to applications rated up to 115VRMS. Peak
current is 30kA for applications greater than 115V.
2. Peak current applies to applications rated up to 132VRMS. Peak
Current is 30kA for applications greater than 132V.
TIME
T2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
Should transients occur in rapid succession, the
average power dissipation required is simply the energy
(watt- seconds) per pulse times the number of pulses
per second. The power so developed must be within
the specifications shown on the Device Ratings and
Specifications table for the specific device. Furthermore,
the operating values need to be derated at high
temperatures as shown above. Because varistors can only
dissipate a relatively small amount of average power they
are, therefore, not suitable for repetitive applications that
involve substantial amounts of average power dissipation.
DA/DB Varistor Series
T
T1
15
150
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/da or /db.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series
Repetitive Surge Capability
Maximum Clamping Voltage
V131DA40 - V751DA40 and V131DB40 - V751DB40
50,000
TA = -55o C to 85 o C
MAXIMUM CLAMPING VOLTAGE
DISC SIZE 40mm
V751DA/DB40
130 TO 750 VM(AC) RATING
V661DA/DB40
V571DA/DB40
V511DA/DB40
3,000
1,000
900
800
700
600
500
400
V421DA/DB40
Figure 3
DISC SIZE 40mm
V131DA40 - V751DA40
V131DB40 - V751DB40
10
5,000
10 2
2,000
10 3
1,000
10 4 5
10 6
10
500
200
100
50
V151DA/DB40
V321DA/DB40
V271DA/DB40
V251DA/DB40
300
V131DA/DB40
200
10 -1
10 0
10 -2
2
10,000
V481DA/DB40
2,000
1
20,000
SURGE CURRENT (A)
MAXIMUM PEAK VOLTS (V)
6,000
5,000
4,000
V131DA40 - V751DA40 and V131DB40 - V751DB40
10 1
10 2
PEAK AMPERES (A)
10 3
10 4
INDEFINITE
20
10
10 5
20
Figure 4
100
1,000
IMPULSE DURATION ( μs)
10,000
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
+/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not
prevent the device from continuing to function, and to provide ample protection.
Physical Specifications
Lead Material
DA - Copper, Tin–plated
DB - Brass, Tin–plated
Operating/Storage
Temperature
-55°C to +85°C/ -55°C to
+125°C
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Humidity Aging
Device Labeling
Marked with LF, part number and date
code
+85°C, 85% RH, 1000 hours
+/- 5% typical resistance
change
Thermal Shock
+85°C to -40°C 10 times
+/- 5% typical resistance
change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/da or /db.html for current information.
151
Revision: November 5, 2009
DA/DB Varistor Series
HI–ENERGY
DA/DBMOV’S
Series
Environmental Specifications
Varistor Products
Industrial High Energy Terminal Varistors > DA/DB Series
Product Dimensions (mm)
DA SERIES
DB SERIES
60.3
(2.37)
“A” DIMENSION:
FILISTER HEAD SCREW - 51mm (2.01)
PAN HEAD SCREW - 53mm (2.09)
ALL DIMENSIONS ARE MAXIMUM
EXCEPT WHERE NOTED
44.45 0.75
(1.75 0.03)
A
4.3mm
(0.170)
15mm (0.59)
25.4
(1.00
46.8
(1.84)
23mm 1mm
(0.90 0.04)
0.75
0.03)
M4 INTERNATIONAL
THREAD
HOLES 0.23 THRU
BORE 0.370 x 0.370 DP
1.6
(0.06)
67mm
(2.64)
12.7
(0.50)
40.5
(1.6)
12.7
(0.50)
2 HOLES
6.60
(0.26)
57mm
(2.24)
23
(0.90)
62mm
(2.44)
6.60
(0.26)
41
(1.61)
4.5mm (0.18)
Dimensions in millimeters and (inches).
Part Numbering System
V XX X DA 40
VARISTOR
DISC SIZE (60mm)
VM(AC)
SERIES DESIGNATOR
First Two Significant Digits*
DA or DB
VM(AC)
Decade Multiplier*
*Refer to Rating & Specifications table
Example:
130 VM(AC) = 131
DA/DB Varistor Series
152
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/da or /db.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > HA Series
RoHS
HA Varistor Series
Description
HA Series transient surge suppressors are industrial high
energy Metal-Oxide Varistors (MOVs). They are designed
to provide secondary surge protection in the outdoor
and service entrance environment (distribution panels)
of buildings, and also in industrial applications for motor
controls and power supplies used in the oil-drilling, mining,
and transportation fields.
The design of the HA Series of MOVs provide rigid
terminals for screw mounting. Also available in a clipped
lead version for through hole board placement or to
accommodate soldered leads designation "HC."
Agency Approvals
Agency
See Ratings and Specifications Table for part number and
brand information.
Agency File Number
Features
E320116
•
RoHS compliant
and Lead–free
•
Wide operating
voltage range
VM(AC)RMS
110V to 750V
LR91788
•
Two disc sizes available
32mm and 40mm
•
High energy absorption
capability
WTM = 170J to 1050J
•
High peak pulse current
capability, ITM =
25,000A to 40,000A
•
Rigid terminals for
secure mounting
•
Available in trimmed
version for through
hole board mounting
– Designation "HC"
•
No derating up to
85ºC ambient
Absolute Maximum Ratings
Continuous
HA Series
Units
AC Voltage Range (VM(AC)RMS)
110 to 750
V
DC Voltage Range (VM(DC))
148 to 970
V
25,000 to 40,000
A
HI–ENERGY
HAMOV’S
Series
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Steady State Applied Voltage:
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range
160 to 1050
J
Operating Ambient Temperature Range (TA)
For 2ms Current Squarewave (WTM)
-55 to +85
ºC
Storage Temperature Range (TSTG)
-55 to +125
ºC
<0.01
%/ºC
2500
V
1000
MΩ
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
Hi–Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL–STD 202, Method 301)
COATING Insulation Resistance
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This
is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ha.html for current information.
153
Revision: November 5, 2009
HA Varistor Series
Varistor Products
Industrial High Energy Terminal Varistors > HA Series
HA Series Ratings & Specifications
Maximum Rating (85°C)
Part
Number
Device
Branding
Continuous
Specifications (25°C)
Transient
Energy
(2ms)
Peak Current
8 x 20μs
Varistor Voltage at 1mA
DC Test Current
Maximum
Clamping Volt
VC at 200A
Current (8/20μs)
Typical
Capacitance f =
1MHz
VRMS
VDC
VM(AC)
VM(DC)
WTM
ITM
Min
VN(DC)
Max
VC
C
V111HA32
V111HA40
V131HA32
V131HA40
V141HA32
V141HA40
V151HA32
V151HA40
V181HA32
V181HA40
V201HA32
V201HA40
V251HA32
V251HA40
V271HA32
V271HA40
V301HA32
V301HA40
V321HA32
V321HA40
V331HA32
V331HA40
V351HA32
V351HA40
(V)
110
110
130
130
140
140
150
150
180
180
200
200
250
250
275
275
300
300
320
320
330
330
350
350
(V)
148
148
175
175
188
188
200
200
240
240
265
265
330
330
369
369
410
410
420
420
435
435
460
460
Energy
160
220
200
270
210
290
220
300
240
330
260
350
330
370
360
400
370
430
390
460
385
475
390
500
(A)
25000
400001
25000
400002
25000
400003
25000
400004
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
(V)
156
156
184
184
198
198
212
212
254
254
283
283
354
354
389
389
433
433
462
462
467
467
495
495
(V)
173
173
200
200
220
220
240
240
282
282
314
314
390
390
430
430
478
478
510
510
519
519
550
550
(V)
190
190
228
228
248
248
268
268
310
310
345
345
429
429
473
473
526
526
561
561
570
570
604
604
(A)
293
288
350
345
380
375
410
405
475
468
540
533
650
630
710
690
795
780
845
825
860
843
910
894
(pF)
5450
11600
4700
10000
4230
9000
4000
8000
3200
6800
3180
6350
2500
5000
2200
4500
2050
4100
1900
3800
1870
3750
1800
3600
V391HA32
V391HA40
V421HA32
V421HA40
V441HA32
V441HA40
V481HA32
V481HA40
V511HA32
V511HA40
V551HA32
V551HA40
V571HA32
V571HA40
V661HA32
V661HA40
V681HA32
V681HA40
V751HA32
V751HA40
385
385
420
420
440
440
480
480
510
510
550
550
575
575
660
660
680
680
750
750
510
510
560
560
585
585
640
640
675
675
710
710
730
730
850
850
875
875
970
970
395
550
400
600
420
630
450
650
500
700
530
755
550
770
600
900
610
925
700
1050
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
25000
40000
545
545
610
610
622
622
670
670
735
735
778
778
805
805
940
940
962
962
1080
1080
604
604
680
680
691
691
750
750
820
820
864
864
910
910
1050
1050
1068
1068
1200
1200
663
663
748
748
759
759
825
825
910
910
949
949
1000
1000
1160
1160
1173
1173
1320
1320
1020
1000
1120
1100
1200
1147
1290
1230
1355
1295
1515
1430
1570
1480
1820
1720
1830
1780
2050
2000
1750
3500
1500
3000
1450
2900
1300
2700
1200
2500
1190
2390
1100
2200
1000
2000
850
1900
800
1800
NOTE: Average power dissipation of transients not to exceed 2.0W per varistor
1. 40kA capability depends on applications rated up to 97Vrms. 30kA applies if > 97 Vrms.
2. 40kA capability depends on applications rated up to 115Vrms. 30kA applies if > 115 Vrms.
3. 40kA capability depends on applications rated up to 123Vrms. 30kA applies if > 123 Vrms.
4. 40kA capability depends on applications rated up to 132Vrms. 30kA applies if > 132Vrms.
HA Varistor Series
154
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ha.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > HA Series
Power Dissipation Ratings
Peak Pulse Current Test Waveform
PERCENT OF PEAK VALUE
Current , Energy and Power De–Rating Curve
100
PERCENT OF RATED VALUE
90
80
70
60
50
40
30
90
50
10
20
O1
10
0
-55
50
60
70
80
90
100
110
120
130
140
T
TIME
T1
150
AMBIENT TEMPERATURE ( oC)
Figure 1
Figure 2
T2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
Should transients occur in rapid succession, the average power
dissipation required is simply the energy (watt-seconds) per
pulse times the number of pulses per second. The power
so developed must be within the specifications shown on
the Device Ratings and Specifications table for the specific
device. Furthermore, the operating values need to be derated
at high temperatures as shown in above. Because varistors
can only dissipate a relatively small amount of average power
they are, therefore, not suitable for repetitive applications that
involve substantial amounts for average power dissipation.
Maximum Clamping Voltage for 40mm Parts
Maximum Clamping Voltage for 32mm Parts
V111HA40–V751HA40
V111HA32–V751HA32
10000
10000
TA = -55 C to 85C
TA = -55 C to 85C
V661
V751
V571CA32
V511CA32
V441CA32
V551CA32
V331CA32
Maximum Clamping Voltage
HA40 Series
110 to 750V AC Rating
V681CA32
V481CA32
V661HA32
V301CA32
V321CA32
V751CA32
V481
V421CA32
V351CA32
V421
V391CA32
V441
V551
V681
V571
V511
Voltage (V)
V391
1000
V351
V331
V321
V301
1000
V271
V251
C111CA32
V201
V131CA32
V151CA32
V271CA32
V251CA32
V201CA32
V141CA32
V181
V181CA32
V131
V141
V151
V111
100
0.001
0.01
0.1
1
10
100
1000
10000
100
0.001
100000
Current (A)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ha.html for current information.
0.01
0.1
1
10
100
1000
10000
100000
Current - (A)
Figure 4
Figure 3
155
Revision: November 5, 2009
HA Varistor Series
HI–ENERGY
HAMOV’S
Series
Maximum Clamping Voltage
HA32 Series
110 to 750V AC Rating
Voltage (V)
100
Varistor Products
Industrial High Energy Terminal Varistors > HA Series
Repetitive Surge Capability for 40mm Parts
Repetitive Surge Capability for 32mm Parts
V111HA40 – V751HA40
V111HA32 – V751HA32
50,000
20,000
10,000
50,000
DISC SIZE 32mm
V111HA32 - V751HA32
1
1
SURGE CURRENT (A)
SURGE CURRENT (A)
2
2,000 10
1,000 10 3
500 10 4
5
200 10
50
10 6
20
10
10,000
5,000 10
100
DISC SIZE 40mm
V111HA40 - V751HA40
2
20,000
2
5,000
10 2
2,000
10 3
1,000
10 4
500
10 5
200
10 6
100
50
10
10
20
100
1,000
10,000
20
100
Figure 6
IMPULSE DURATION ( μs)
Figure 5
INDEFINITE
20
INDEFINITE
1,000
IMPULSE DURATION ( μs)
10,000
Wave Solder Profile
Non Lead–free Profile
Lead–free Profile
300
300
250
TEMPERATURE (ºC)
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
250
200
150
100
50
200
150
100
50
0
0
0
0.5
1
1.5
2
2.5
3
3.5
4
0
TIME(MINUTES)
Figure 7
0.5
1
1.5
2
Physical Specifications
Environmental Specifications
Lead Material
Tin–plated Copper
Operating/Storage
Temperature
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Humidity Aging
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Thermal Shock
Device Labeling
LF, Part Number and date code
HA Varistor Series
2.5
3
3.5
4
TIME(MINUTES)
Figure 8
-55°C to +85°C/
-55°C to +125°C
+85°C, 85% RH, 1000 hours
+/- 10% typical resistance
change
+85°C to -40°C 10 times
+/- 10% typical resistance
change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
156
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ha.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > HA Series
Dimensions
D
D
H
H
B
B
W
W
T
X
oA
T
S
T1
SC
R
HA Series Outline Specifications
HC Series Outline Specifications
(Dimensions in Millimeters)
(Dimensions in Millimeters)
D
H
Max Max
B
X
T
T1
øA
Min Nom Nom Max Max
HA32 35.5 50.00
3.0
25
9.3
10.4
4.2
HA40 42.5 5700
3.0
25
9.3
10.4
4.2
s
Offset
Depends
on Device
Voltage
(See Table
Below
D
Max
H
Max
B
Min
X
Nom
T
Nom
R
Max
HC32
35.5
50.00
5.0
25
9.30
1.0
HC40
42.5
57.00
5.0
25
9.30
1.0
sc
Offset
Depends
on Device
Voltage (See
Table Below
HA Series Maximum Thickness and Terminal Offsets
HC Series Maximum Thickness and Terminal Offsets
(Dimensions in Millimeters)
(Dimensions in Millimeters)
Voltage
Dimension "S"
(-/+1mm)
Thickness "W"
HA32
HA40
HA32
HA40
Voltage
Thickness "W"
HC32
Dimension "SC"
(-/+1mm)
HC40
HC32
HC40
V111 - V351
9.00
9.00
3.90
3.90
V111 - V351
9.00
9.00
6.00
6.00
V391 - V511
11.00
11.00
2.60
2.60
V391 - V511
11.00
11.00
7.30
8.10
V551 - V751
13.00
13.00
1.00
1.00
V551 - V751
13.00
13.00
8.90
10.00
Part Numbering System
V XX X HA XX
DISC SIZE (mm)
VARISTOR
VM(AC)
First Two Significant Digits
SERIES DESIGNATOR
HA or HC
VM(AC)
Decade Multiplier
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ha.html for current information.
157
Revision: November 5, 2009
HA Varistor Series
HI–ENERGY
HAMOV’S
Series
X
Varistor Products
158
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
TMOV34S® Varistor Series
RoHS
Description
The Littelfuse Industrial TMOV34S® Series thermally
protected varistor represents a new development in
circuit protection. It consists of a 34mm square format
varistor element (MOV) with an integral thermally activated
element designed to open in the event of overheating
due to abnormal overvoltage, limited current conditions
as outlined in UL1449 Feb. 1998 edition. The device has a
third lead, an indicator lead, which may be used to indicate
that the MOV has been disconnected from the circuit.
This lead facilitates connection to monitoring circuitry.The
TMOV34S® devices offer quick thermal response due to
the close proximity of the integrated thermal element to
the MOV body. The integrated configuration also offers
lower inductance than most discreet solutions resulting
in improved clamping performance to fast over voltage
transients.
Agency Approvals
Agency
Agency File Number
E75961
Features
•
Applications
•
TVSS Products
•
•
AC Panel Protection
Modules
UPS (Uninterruptable
Power Supply)
•
Inverters
•
AC/DC Power Supplies
•
DIN Rail
•
AC Line Power
Supplies
•
AC Power Meters
US patent for thermally
protected MOV–
Patent # 6636403
•
Designed to facilitate
compliance to UL1449
for TVSS product
•
High peak current
rating to 40 kA
•
-55ºC to +85ºC
operating temp
•
Agency recognition: UL
•
Alternative design
available with
narrow 3mm wide
monitor (right) lead
•
Alternative design
available with 2 leads
only (no monitor lead)
•
RoHS Compliant and
Lead–free Available
HI–ENERGY
TMOV34S®MOV’S
Series
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
HA Series
Units
115 to 750
V
up to 40,000
A
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave, single pulse
Single Pulse Energy Range
235 to 1050
J
Operating Ambient Temperature Range (TA)
For 2ms Current Wave
-55 to + 85
ºC
Storage Temperature Range (TSTG)
-55 to + 125
ºC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
<0.01
%/ºC
Hi–Pot Encapsulation (Isolation Voltage Capability)
2500
V
600
V
1000
MΩ
Thermal Protection Isolation Voltage Capability (when operated)
-Under UL1449 Limited Current Test Procedure–see Note #1
Hi–Pot Encapsulation (COATING Isolation Voltage Capability)
V
COATING Insulation Resistance
#1 – Under UL 1449 limited current testing parts rated >420V will not open due to 600V voltage limit. Devices with ratings
>420V have not yet been evaluated.
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This
is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
159
Revision: November 5, 2009
TMOV34S® Varistor Series
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
TMOV34S® Series Ratings & Specifications - Standard 3 Lead Design
Maximum Rating (85°C)
Lead–free and
RoHS Compliant
Models
Standard
Models
Part Number
Continuous
Specifications (25°C)
Transient
AC
Volts
DC
Volts
MCOV
Surge
Arrester
Part Number
VM(AC)RMS
VM(AC)
VM(AC)RMS
TMOV34S111MP
TMOV34S111M
115
150
TMOV34S131MP
TMOV34S131M
130
TMOV34S141MP
TMOV34S141M
140
Maximum
Typical
Varistor Voltage
Clamping Volt VC Capaciat 1mA
at 200A Current tance f =
Test Current
(8/20μs)
1MHz
(V)
WTM
1 x Pulse
(J)
Peak
Current
8 x 20μs
ITM
1 x Pulse
(A)
98
235
400001
175
111
270
400002
184
188
119
291
400003
198
4
(V)
Energy
2ms
(V)
VN(DC
Max
(V)
(V)
(pF)
163
202
305
11500
228
345
10000
248
375
9000
VN(DC)Min
VC
C
TMOV34S151MP
TMOV34S151M
150
200
128
300
40000
212
268
405
8000
TMOV34S181MP
TMOV34S181M
180
240
153
330
400005
254
312
488
6800
TMOV34S201MP
TMOV34S201M
200
265
170
335
40000
283
357
540
6500
TMOV34S251MP
TMOV34S251M
250
330
213
370
40000
354
429
650
5000
TMOV34S271MP
TMOV34S271M
275
369
234
400
40000
389
473
730
4500
TMOV34S301MP
TMOV34S301M
300
400
255
435
40000
433
528
780
4050
TMOV34S321MP
TMOV34S321M
320
420
272
460
40000
462
561
830
3800
TMOV34S331MP
TMOV34S331M
330
435
281
475
40000
476
581
855
3700
TMOV34S351MP
TMOV34S351M
350
460
298
500
40000
505
616
910
3500
TMOV34S391MP
TMOV34S391M
385
506
327
550
40000
555
678
1005
3300
TMOV34S421MP
TMOV34S421M
420
560
357
600
40000
610
748
1130
3000
TMOV34S461MP
TMOV34S461M
460
610
391
620
40000
642
783
1188
2800
TMOV34S481MP
TMOV34S481M
480
640
408
650
40000
670
825
1240
2700
TMOV34S511MP
TMOV34S511M
510
675
434
700
40000
735
910
1350
2500
TMOV34S551MP
TMOV34S551M
550
700
468
735
40000
770
939
1415
2250
TMOV34S571MP
TMOV34S571M
575
730
489
770
40000
805
1000
1480
2200
TMOV34S621MP
TMOV34S621M
620
800
527
840
40000
880
1074
1589
2100
TMOV34S661MP
TMOV34S661M
660
850
561
900
40000
940
1160
1720
2000
TMOV34S681MP
TMOV34S681M
680
890
578
950
40000
980
1195
1772
1970
TMOV34S751MP
TMOV34S751M
750
970
638
1050
40000
1080
1320
2000
1800
Notes :
Same ratings and specifications apply to 2 leaded alternative design. Replace 'M' with 'E' in part number. Refer to Part Numbering System at the end of this document..
1. Peak current applies to applications rated up to 100 VACRMS, 132 VDC. Peak current is 30kA max for applications greater than 100 VACRMS, 132 VDC
2. Peak current applies to applications rated up to 115 VACRMS, 145 VDC. Peak current is 30kA max for applications greater than 115 VACRMS, 145 VDC.
3. Peak current applies to applications rated up to 123 VACRMS, 165 VDC. Peak current is 30kA max for applications greater than 123 VACRMS, 165 VDC.
4. Peak current applies to applications rated up to 132 VACRMS, 176 VDC. Peak current is 30kA max for applications greater than 132 VACRMS, 176 VDC.
5 . Peak current applies to applications rated up to 158 VACRMS, 211 VDC. Peak current is 30kA max for applications greater than 158 VACRMS, 211 VDC
TMOV34S® Varistor Series
160
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
TMOV34S® Series Ratings & Specifications - Alternative 2 Lead Design
Maximum Rating (85°C)
Continuous
Specifications (25°C)
Transient
AC
Volts
DC
Volts
MCOV
Surge
Arrester
Part Number
VM(AC)RMS
VM(AC)
VM(AC)RMS
TMOV34S111EP
115
150
TMOV34S131EP
130
TMOV34S141EP
140
Maximum
Typical
Varistor Voltage
Clamping Volt VC Capaciat 1mA
at 200A Current tance f =
Test Current
(8/20μs)
1MHz
(V)
WTM
1 x Pulse
(J)
Peak
Current
8 x 20 μs
ITM
1 x Pulse
(A)
98
235
400001
175
111
270
400002
184
188
119
291
400003
198
4
(V)
Energy
2ms
(V)
VN(DC
Max
(V)
(V)
(pF)
163
202
305
11500
228
345
10000
248
375
9000
VN(DC)Min
VC
C
TMOV34S151EP
150
200
128
300
40000
212
268
405
8000
TMOV34S181EP
180
240
153
330
400005
254
312
488
6800
TMOV34S201EP
200
265
170
335
40000
283
357
540
6500
TMOV34S251EP
250
330
213
370
40000
354
429
650
5000
TMOV34S271EP
275
369
234
400
40000
389
473
730
4500
TMOV34S301EP
300
400
255
435
40000
433
528
780
4050
TMOV34S321EP
320
420
272
460
40000
462
561
830
3800
TMOV34S331EP
330
435
281
475
40000
476
581
855
3700
TMOV34S351EP
350
460
298
500
40000
505
616
910
3500
TMOV34S391EP
385
506
327
550
40000
555
678
1005
3300
TMOV34S421EP
420
560
357
600
40000
610
748
1130
3000
TMOV34S461EP
460
610
391
620
40000
642
783
1188
2800
TMOV34S481EP
480
640
408
650
40000
670
825
1240
2700
TMOV34S511EP
510
675
434
700
40000
735
910
1350
2500
TMOV34S551EP
550
700
468
735
40000
770
939
1415
2250
TMOV34S571EP
575
730
489
770
40000
805
1000
1480
2200
TMOV34S621EP
620
800
527
840
40000
880
1074
1589
2100
TMOV34S661EP
660
850
561
900
40000
940
1160
1720
2000
TMOV34S681EP
680
890
578
950
40000
980
1195
1772
1970
TMOV34S751EP
750
970
638
1050
40000
1080
1320
2000
1800
HI–ENERGY
TMOV34S®MOV’S
Series
Lead–free
and RoHS
Compliant
Models
Notes :
Same ratings and specifications apply to 3 leaded design. Replace 'E' with 'M' in part number. Refer to Part Numbering System at the end of this document..
1. Peak current applies to applications rated up to 100 VACRMS, 132 VDC. Peak current is 30kA max for applications greater than 100 VACRMS, 132 VDC
2. Peak current applies to applications rated up to 115 VACRMS, 145 VDC. Peak current is 30kA max for applications greater than 115 VACRMS, 145 VDC.
3. Peak current applies to applications rated up to 123 VACRMS, 165 VDC. Peak current is 30kA max for applications greater than 123 VACRMS, 165 VDC.
4. Peak current applies to applications rated up to 132 VACRMS, 176 VDC. Peak current is 30kA max for applications greater than 132 VACRMS, 176 VDC.
5 . Peak current applies to applications rated up to 158 VACRMS, 211 VDC. Peak current is 30kA max for applications greater than 158 VACRMS, 211 VDC
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
161
Revision: November 5, 2009
TMOV34S® Varistor Series
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
Typical time to open circuit under UL1449 Abnormal
Overvoltage Limited Current Test
Peak Current & Energy Derating Curve
10
100
PERCENT OF RATED VALUE
Typical
5A
2.5A
0.5A
0.125A
1
80
60
40
20
0
-55
0.1
10
100
1000
Figure 1
Time s
®
50
60
70
80
90
100
AMBIENT TEMPERATURE (ºC)
Figure 2
1000
110
120
130
For applications exceeding 85ºC ambient temperature, the peak
surge current and energy ratings must be reduced as shown.
®
Note: The Industrial TMOV Series TMOV34S devices
are intended, in conjunction with appropriate enclosure
design, to help facilitate TVSS module compliance to
UL 1449, Section 37.4 (Abnormal Overvoltage Limited
Current Requirements). Under these extreme abnormal
overvoltage conditions, the units will exhibit substantial
heating and potential venting prior to opening. Modules
should be designed to contain this possibility. Application
testing is strongly recommended.
Pulse Rating Curve
50,000
1
20,000
SURGE CURRENT (A)
10,000
2
10
5,000
10 2
2,000
10 3
1,000
500
Hx34
10 5
10 6
10 4
200
100
50
20
10
Figure 3
INDEFINITE
20
100
1,000
10,000
IMPULSE DURATION (μs)
V–I Characteristic Curves for TMOV34S® Varistor
10000
Maximum Clamping Voltage
TMOV34S series
TA = -55 C to 85C
V751
Voltage VOLTS
V661
V511
V551
V681
V571
1000
V481
V141 V131
V111
V441
V151
V421
Figure 4
TMOV34S® Varistor Series
100
1mA
10mA
100mA
Current - AMPS
1A
10A
V391
100A 1000A
V351 V331 V321 V301 V271
162
Revision: November 5, 2009
10000A
100000A
V251 V201 V181
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
Lead Configurations
TMOV34S® "M" 3-Lead Varistor
TMOV34S® "E" 2-Lead Varistor
2
Thermal
Fuse
Element
Thermal
Fuse
Element
3
Monitor Lead
MOV
MOV
1
3
2
Note: MOVs are non-polarized passive elements
1
Monitor Lead
TMOV34S® Varistor Application Examples
The application examples below show how the monitor lead on the TMOV34S® can be used to indicate that the thermal
element has been opened. This signifies that the circuit is no longer protected from transients by the MOV.
Application Example 1
Application Example 3
In this case, the LED is normally on, and is off when the
thermal element opens.
This circuit illustrates the use of the monitoring lead of
the TMOV34S® varistor to ensure that equipment is only
operated when overvoltage protection present. In normal
operation the load switch relay solenoid is powered via the
monitor lead of the TMOV34S® varistor. In the event of the
thermal element being activated, the relay will de-activate,
cutting power to the protected circuit and the fault LED will
illuminate.
To Protected Circuit
Line
Line Fuse
LED
R
Line
"Load Powered"
neon lamp
TMOV34S “M”
Varistor
Application Example 2
Fault LED
(Normallyoff)
This circuit utilizes an optocoupler to provide
galvanic isolations between the TMOV34S®
varistor and the indicating or alarm circuitry.
R
Neutral
Line
TMOV34S “M”
Varistor
R
AC OPTOCOUPLER
Please note: Indicator circuits are provided as a
guideline only. Verification of actual indicator circuitry
is the responsibility of the end user. Component
values selected must be appropriate for the specific
AC line voltage service and application.
To Protected Circuit
Line Fuse
TO STATUS
ANNUNCIATOR
LIGHT/ALARM
Neutral
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
163
Revision: November 5, 2009
TMOV34S® Varistor Series
HI–ENERGY
TMOV34S®MOV’S
Series
Load Switch Relay
(loss of protection)
Line Fuse
Neutral
To Protected Circuit
TMOV34S “M”
Varistor
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
Wave Solder Profile
Because the TMOV34S® Series varistors contain a thermal protection device, care must be taken when soldering the devices into
place. Two soldering methods are possible. Firstly, hand soldering:
It is recommended to heat–sink the leads of the device. Secondly,
wave–soldering: It is critically important that all preheat stage and
the solder bath temperatures are rigidly controlled.
Lead–free Profile
Non Lead–free Profile
300
300
250
TEMPERATURE (ºC)
250
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
200
150
100
200
150
100
50
50
0
0
0
0.5
1
1.5
2
2.5
3
3.5
0
4
TIME(MINUTES)
Figure 5
0.5
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Figure 6
Physical Specifications
Environmental Specifications
Lead Material
Tin–plated Copper
Operating/Storage
Temperature
-55°C to +85°C/
-55°C to +125°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% voltage
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Thermal Shock
+85°C to -40°C 10 times
+/-10% voltage
Device Labeling
Marked with LF, part identifier, and
date code
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
TMOV34S® Varistor Series
164
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
Dimensions 3 Leaded Series
Part Number
37.0 MAX
Dimensions in millimeter
unless otherwise specified
To order alternative design
with narrow 3mm monitor lead
(right hand terminal as shown)
add suffix X2696 to part number
47.5
MAX
3.0 ±0.25
7.5 ±1.1
22.0 ±1.0
6.0 ±0.1
Monitor
Terminal
6.0 ±0.1
5.3 ± 0.1
22.0 ± 1.0
(NOTE: Middle terminal is not at center)
0.55 ± 0.1
Middle
Terminal
Faces of Terminals In Line
± 0.75
42.5
MAX
Outside
Terminals
0.8 ± 0.1
T
5.3 ± 0.1
Middle
Terminal
6.0 ± 0.1
Outside
Terminals
4.5 ± 1.1
Middle
Terminal
(NOTE: Middle terminal is not at center)
2.30 ± 0.2
2.5 to 5.0
S
Center to center of outside terminals
Middle terminal does not have seating crimp
"T" Max Body
Thickness
“S” Mounting
Terminal Offset
5.2 -/+ .65
TMOV34S111M(P)
11.90
TMOV34S131M(P)
12.20
5.5 -/+ .65
TMOV34S141M(P)
12.30
5.7 -/+ 0.85
TMOV34S151M(P)
12.40
5.9 -/+ 0.85
TMOV34S181M(P)
12.80
6.3 -/+ 0.85
TMOV34S201M(P)
13.00
6.5 -/+ 0.85
TMOV34S251M(P)
12.75
6.25 -/+ 0.85
TMOV34S271M(P)
12.95
6.5 -/+ 0.85
TMOV34S301M(P)
13.30
6.8 -/+ 1.0
TMOV34S321M(P)
13.50
6.9 -/+ 1.0
TMOV34S331M(P)
13.60
7.2 -/+ 1.0
TMOV34S351M(P)
13.80
7.4 -/+ 1.0
TMOV34S391M(P)
14.20
7.6 -/+ 1.0
TMOV34S421M(P)
14.50
7.85 -/+ 1.0
TMOV34S461M(P)
14.75
8.15 -/+ 1.0
TMOV34S481M(P)
14.95
8.25 -/+ 1.0
TMOV34S511M(P)
15.40
8.6 -/+ 1.0
TMOV34S551M(P)
15.60
8.65 -/+ 1.0
TMOV34S571M(P)
15.90
8.85 -/+ 1.0
TMOV34S621M(P)
16.40
9.25 -/+ 1.0
TMOV34S661M(P)
16.85
9.65 -/+ 1.0
TMOV34S681M(P)
17.20
9.85 -/+ 1.0
TMOV34S751M(P)
17.80
10.65 -/+ 1.0
S Dimension -Mounting Terminal
Offset
2.8 -/+.65
TMOV34S111EP
T Dimension
Max Body
Thickness
11.9
TMOV34S131EP
12.2
2.9 -/+.65
TMOV34S141EP
12.3
3.0 -/+0.85
Part Number
37.0 MAX
T
47.5
MAX
4 ± 0.5
0.51 ± 0.1
7 ± 0.1
1.4 ± 0.1
S
25.4 ± 1.0
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
TMOV34S151EP
12.4
3.1 -/+0.85
TMOV34S181EP
12.8
3.4 -/+0.85
TMOV34S201EP
13.0
3.6 -/+0.85
TMOV34S251EP
12.8
4.0 -/+0.85
TMOV34S271EP
13.0
4.3 -/+0.85
TMOV34S301EP
13.3
4.5 -/+1.0
TMOV34S321EP
13.5
4.7 -/+1.0
TMOV34S331EP
13.6
4.8 -/+1.0
TMOV34S351EP
13.8
5.0 -/+1.0
TMOV34S391EP
14.2
5.4 -/+1.0
TMOV34S421EP
14.5
5.7 -/+1.0
TMOV34S461EP
14.8
5.9 -/+1.0
TMOV34S481EP
15.0
6.1 -/+1.0
TMOV34S511EP
15.4
6.6 -/+1.0
TMOV34S551EP
15.6
6.8 -/+1.0
TMOV34S571EP
15.9
7.1 -/+1.0
TMOV34S621EP
16.4
7.5 -/+1.0
TMOV34S661EP
16.9
7.9 -/+1.0
TMOV34S681EP
17.2
8.2 -/+1.0
TMOV34S751EP
17.8
8.8 -/+1.0
165
Revision: November 5, 2009
TMOV34S® Varistor Series
HI–ENERGY
TMOV34S®MOV’S
Series
Dimensions - Alternative 2 Leaded Series
Varistor Products
Industrial High Energy Thermally Protected Varistors > TMOV34S® Series
Part Numbering System
TMOV 34 S 151 M P X2696
DEVICE FAMILY
Littelfuse Thermally Protected MOV
DISC SIZE (mm)
34 mm
CERAMIC SHAPE
S: Square
VM(AC)RMS
115V to 750V
TMOV34S® Varistor Series
Optional Design
5 digit suffix when alternative 3mm
wide monitor lead is required
P: LEAD-FREE AND
RoHS COMPLIANT
OPTION
Series Designator
M: 3-Leaded TMOV34S Varistor Series
E: 2-Leaded TMOV34S Varistor Series
(alternative design)
Supplied in Bulk Pack
166
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/tmov34s.html for current information.
Varistor Products
Industrial High Energy Terninal Varistors > HB34, HF34 & HG34 Series
RoHS
HB34, HF34 and HG34 Varistor Series
Description
The HB34, HF34, and HG34 Series of transient surge
suppressors are industrial high-energy Metal-Oxide
Varistors (MOVs). They are designed to provide surge
suppression in the AC mains outdoor and service entrance
environment (distribution panels) of buildings. Applications
also include industrial heavy motors, controls, and power
supplies such as used in the oil-drilling, mining, and
transportation fields, including HVAC and motor/generator
applications.
The HB34 Series provides rigid terminals for throughhole solder mounting on printed circuit boards, thereby
eliminating the need for screw mounting. The HF34
Series has the same rigid through-hole terminals as the
HB34 with the addition of mounting holes for bolt-down
mounting and longer terminals to allow for additional
mounting flexibility. The HG34 has formed feet with
mounting holes for vertical bolt-down mounting.
Agency Approvals
Agency
Agency File Number
E320116
LR91788
See Ratings and Specifications table for part numbers.
•
Wide operating
voltage range
VM(AC)RMS 110V to 750V
High peak pulse
current capability
ITM = 40,000A
•
High energy absorption
capability
WTM = 220J to 1050J
Rigid terminals for
secure through-hole
solder mounting
•
No derating up to
85ºC ambient
•
RoHS Compliant and
Lead–free available
•
•
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
Steady State Applied Voltage:
Hx34 Series
Units
AC Voltage Range (VM(AC)RMS)
110 to 750
V
DC Voltage Range (VM(DC))
148 to 970
V
40000
A
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range
220 to 1050
J
Operating Ambient Temperature Range (TA)
-55 to +85
ºC
Storage Temperature Range (TSTG)
-55 to +125
ºC
<0.01
%/ºC
For 2ms Current Wave (WTM)
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
V
MΩ
COATING Insulation Resistance
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This
is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational
sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34.html or /hf34 or /hg34.thml
for current information.
167
Revision: November 5, 2009
HB34, HF34 and HG34 Varistor Series
HBx/HFx/HGx
HI–ENERGY MOV’S
Series
Features
Varistor Products
Industrial High Energy Terminal Varistors > HB34, HF34 & HG34 Series
HB34 Series Ratings & Specifications
Maximum Rating (85°C)
Lead–free
Model
and RoHS
Size
Compliant Models
Disc
Dia.
(mm)
Part Number
Continuous
Specifications (25°C)
Transient
VRMS
VDC
Energy
(2ms)
VM(AC)
VM(DC)
WTM
Peak
Current
8 x 20μs
ITM
Varistor Voltage at 1mA
DC Test Current
Min
VN(DC)
Max
Maximum
Clamping Voltage
VC at 200A
Current (8/20μs)
Typical
Capacitance
VC
f = 1MHz
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(V)
(pF)
V111HB34
34
110
148
220
40,0001
156
173
190
288
11,600
V131HB34
34
130
175
270
40,0002
184
200
228
345
10,000
291
3
V141HB34
34
140
188
40,000
198
220
248
375
9,000
4
V151HB34
34
150
200
300
40,000
212
240
268
405
8,000
V181HB34
34
180
240
330
40,000
254
282
310
468
6,800
V201HB34
34
200
265
350
40,000
283
314
345
533
6,350
V251HB34
34
250
330
370
40,000
354
390
429
650
5,000
V271HB34
34
275
370
400
40,000
389
430
473
730
4,500
V301HB34
34
300
410
430
40,000
433
478
526
780
4,100
V321HB34
34
320
420
460
40,000
462
510
561
830
3,800
V331HB34
34
330
435
475
40,000
467
519
570
843
3,750
V351HB34
34
350
460
500
40,000
495
550
604
894
3,600
V391HB34
34
385
510
550
40,000
545
604
663
1000
3,500
V421HB34
34
420
560
600
40,000
610
680
748
1,130
3,000
V441HB34
34
440
587
620
40,000
622
691
759
1,150
2,900
V481HB34
34
480
640
650
40,000
670
750
825
1,240
2,700
V511HB34
34
510
675
700
40,000
735
820
910
1,350
2,500
V551HB34
34
550
710
755
40,000
778
864
949
1,404
2,390
V571HB34
34
570
730
770
40,000
805
910
1000
1,480
2,200
V661HB34
34
660
850
900
40,000
940
1050
1160
1,720
2,000
V681HB34
34
680
875
925
40,000
962
1068
1173
1,777
1,900
V751HB34
34
750
970
1050
40,000
1080
1200
1320
2,000
1,800
NOTE: Average power dissipation of transients not to exceed 2.0W.
1. Peak current applies to applications rated up to 97VRMS. Peak current is 30kA for applications greater than 97V.
2. Peak current applies to applications rated up to 115VRMS. Peak current is 30kA for applications greater than 115V
3. Peak current applies to applications rated up to 123VRMS. Peak current is 30kA for applications greater than 123V.
4. Peak current applies to applications rated up to 132VRMS. Peak current is 30kA for applications greater than 132V.
HB34, HF34 and HG34 Varistor Series
168
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34 or /hf34 or /hg34.html
for current information.
Varistor Products
Industrial High Energy Terninal Varistors > HB34, HF34 & HG34 Series
HF34 Series Ratings & Specifications
Continuous
Specifications (25°C)
Transient
VRMS
VDC
Energy
(2ms)
VM(AC)
VM(DC)
WTM
Peak
Current
8 x 20 μs
ITM
Varistor Voltage at 1mA
DC Test Current
Min
VN(DC)
Max
Maximum
Clamping Voltage
VC at 200A
Current (8/20μs)
Typical
Capacitance
VC
f = 1MHz
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(V)
(pF)
V111HF34
34
110
148
220
40,0001
156
173
190
288
11,600
V131HF34
34
130
175
270
40,0002
184
200
228
345
10,000
291
3
V141HF34
34
140
188
40,000
198
220
248
375
9,000
4
V151HF34
34
150
200
300
40,000
212
240
268
405
8,000
V181HF34
34
180
240
330
40,000
254
282
310
468
6,800
V201HF34
34
200
265
350
40,000
283
314
345
533
6,350
V251HF34
34
250
330
370
40,000
354
390
429
650
5,000
V271HF34
34
275
370
400
40,000
389
430
473
730
4,500
V301HF34
34
300
410
430
40,000
433
478
526
780
4,100
V321HF34
34
320
420
460
40,000
462
510
561
830
3,800
V331HF34
34
330
435
475
40,000
467
519
570
843
3,750
V351HF34
34
350
460
500
40,000
495
550
604
894
3,600
V391HF34
34
385
510
550
40,000
545
604
663
1,000
3,500
V421HF34
34
420
560
600
40,000
610
680
748
1,130
3,000
V441HF34
34
440
587
620
40,000
622
691
759
1,150
2,900
V481HF34
34
480
640
650
40,000
670
750
825
1,240
2,700
V511HF34
34
510
675
700
40,000
735
820
910
1,350
2,500
V551HF34
34
550
710
755
40,000
778
864
949
1,404
2,390
V571HF34
34
570
730
770
40,000
805
910
1000
1,480
2,200
V661HF34
34
660
850
900
40,000
940
1050
1160
1,720
2,000
V681HF34
34
680
875
925
40,000
962
1068
1173
1777
1,900
V751HF34
34
750
970
1050
40,000
1080
1200
1320
2,000
1,800
Note:
1. Peak current applies to applications rated up to 97VRMS. Peak current is 30kA for applications greater than 97V.
2. Peak current applies to applications rated up to VRMS. Peak current is 30kA for applications greater than 115V.
3. Peak current applies to applications rated up to VRMS. Peak current is 30kA for applications greater than 123V.
4. Peak current applies to applications rated up to VRMS. Peak current is 30kA for applications greater than 132V.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34.html or /hf34 or /hg34.thml
for current information.
169
Revision: November 5, 2009
HB34, HF34 and HG34 Varistor Series
HBx/HFx/HGx
HI–ENERGY MOV’S
Series
Maximum Rating (85°C)
Lead–free
Model
and RoHS
Size
Compliant Models
Disc
Dia.
(mm)
Part Number
Varistor Products
Industrial High Energy Terminal Varistors > HB34, HF34 & HG34 Series
HG34 Series Ratings & Specifications
Maximum Rating (85°C)
Lead–free
Model
and RoHS
Size
Compliant Models
Disc
Dia.
(mm)
Part Number
Continuous
Specifications (25°C)
Transient
Peak
Current
8 x 20 μs
Varistor Voltage at 1mA
DC Test Current
Maximum
Clamping Voltage
VC at 200A
Current (8/20μs)
Typical
Capacitance
f = 1MHz
VRMS
VDC
Energy
(2ms)
VM(AC)
VM(DC)
WTM
ITM
Min
VN(DC)
Max
VC
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(V)
(pF)
V111HG34
34
110
148
220
40,0001
156
173
190
288
11,600
V131HG34
34
140
175
270
40,0002
184
200
228
345
10,000
V141HG34
34
130
188
291
40,0003
198
220
248
375
9,000
4
V151HG34
34
150
200
300
40,000
212
240
268
405
8,000
V181HG34
34
180
240
330
40,000
254
282
310
468
6,800
V201HG34
34
200
265
350
40,000
283
314
345
533
6,350
V251HG34
34
250
330
370
40,000
354
390
429
650
5,000
V271HG34
34
275
370
400
40,000
389
430
473
730
4,500
V301HG34
34
300
410
430
40,000
433
478
526
780
4,100
V321HG34
34
320
420
460
40,000
462
510
561
830
3,800
V331HG34
34
330
435
475
40,000
467
519
570
843
3,750
V351HG34
34
350
460
500
40,000
495
550
604
894
3,600
V331HG34
34
385
510
550
40,000
545
604
663
1,000
3,500
V421HG34
34
420
560
600
40,000
610
680
748
1,130
3,000
V441HG34
34
440
587
620
40,000
622
691
759
1,150
2,900
V481HG34
34
480
640
650
40,000
670
750
825
1,240
2,700
V511HG34
34
510
675
700
40,000
735
820
910
1,350
2,500
V551HG34
34
550
710
755
40,000
778
864
949
1,404
2,390
V571HG34
34
570
730
770
40,000
805
910
1000
1,480
2,200
V661HG34
34
660
850
900
40,000
940
1050
1160
1,720
2,000
V681HG34
34
680
875
925
40,000
962
1068
1173
1,777
1,900
V751HG34
34
750
970
1050
40,000
1080
1200
1320
2,000
1,800
Note :
1. Peak current applies to applications rated up to 97VRMS. Peak current is 30kA for applications greater than 97V.
2. Peak current applies to applications rated up to 115VRMS. Peak current is 30kA for applications greater than 115V.
3. Peak current applies to applications rated up to 123VRMS. Peak current is 30kA for applications greater than 123V.
4. Peak current applies to applications rated up to 132VRMS. Peak current is 30kA for applications greater than 132V.
HB34, HF34 and HG34 Varistor Series
170
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34 or /hf34 or /hg34.html
for current information.
Varistor Products
Industrial High Energy Terninal Varistors > HB34, HF34 & HG34 Series
Peak Pulse Current Test Waveform
PERCENT OF PEAK VALUE
Power Dissipation Ratings
100
90
50
10
O1
T
TIME
T1
T2
Figure 1
Figure 2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
Should transients occur in rapid succession, the
average power dissipation result is simply the energy
(watt-seconds) per pulse times the number of pulses
per second. The power so developed must be within
the specifications shown on the Device Ratings and
Specifications Table for the specific device. The operating
values must be derated as shown in above.
Clamping Voltage for HB34, HF34 and HG34 Series
Surge Current Rating Curves for HB34, HF34 and HG34 Series
10000
50,000
1
TA = -55 C to 85C
Maximum Clamping Voltage
HB34, HF34, and HG34 series
20,000
10,000
V751
V551
V571
1000
V481
V141 V131
V111
5,000
10 2
2,000
10 3
1,000
100
10
10mA
100mA
Current - AMPS
1A
V391
10A
100A 1000A
V351 V331 V321 V301 V271
10000A
10 4
200
20
V151
100
1mA
10 6
50
V441
V421
500
10 5
100000A
INDEFINITE
20
100
1,000
10,000
IMPULSE DURATION (μs)
V251 V201 V181
Figure 3
Figure 4
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
+/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not
prevent the device from continuing to function, and to provide ample protection.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34.html or /hf34 or /hg34.thml
for current information.
171
Revision: November 5, 2009
HB34, HF34 and HG34 Varistor Series
HBx/HFx/HGx
HI–ENERGY MOV’S
Series
V511
Hx34
V681
SURGE CURRENT (A)
V661
Voltage VOLTS
2
10
Varistor Products
Industrial High Energy Terminal Varistors > HB34, HF34 & HG34 Series
Wave Solder Profile
Lead–free Profile
Non Lead–free Profile
300
300
250
TEMPERATURE (ºC)
250
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
200
150
100
200
150
100
50
50
0
0
0
0.5
1
Figure 5
1.5
2
2.5
3
3.5
0
4
0.5
1
Figure 6
TIME(MINUTES)
1.5
2
2.5
3
3.5
Physical Specifications
Environmental Specifications
Lead Material
Tin-plated Copper
Operating/Storage
Temperature
-55°C to +85°C/-55°C to +125°C
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% Voltage
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Thermal Shock
+85°C to -40°C 10 times
+/-10% Voltage
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
Device Labeling
4
TIME(MINUTES)
LF, Part Number and date code
HB34, HF34 and HG34 Varistor Series
172
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34 or /hf34 or /hg34.html
for current information.
Varistor Products
Industrial High Energy Terninal Varistors > HB34, HF34 & HG34 Series
Dimensions (mm)
HB34 Series Thickness and Terminal Offset Dimensions
HB34 Series
42.5
MAX
47.5
MAX
22.0 +/- 1.0
2.30
+/- 0.2
2.5 TO
5.0
0.55
+/- 0.1
6.0 +/- 0.1
Part Type
T Body Thickness
(Max)
S Mounting
Terminal Offset
V111HB34
V131HB34
V141HB34
V151HB34
V181HB34
V201HB34
V251HB34
V271HB34
V301HB34
V321HB34
V331HB34
V351HB34
V391HB34
V421HB34
V441HB34
V481HB34
V511HB34
V551HB34
V571HB34
V661HB34
V681HB34
V751HB34
5.5
5.7
5.8
5.9
6.0
6.0
6.1
6.4
6.7
6.9
7.0
7.3
7.6
7.8
8.0
8.3
8.8
9.1
9.4
10.2
10.4
10.7
5.30 -/+ 0.65
5.50 -/+ 0.65
5.70 -/+ 0.65
5.90 -/+ 0.65
6.10 -/+ 0.65
6.10 -/+ 0.65
6.25 -/+ 0.65
6.50 -/+ 0.65
6.70 -/+ 0.65
6.90 -/+ 0.65
6.95 -/+ 0.65
7.20 -/+ 0.85
7.50 -/+ 0.85
7.85 -/+ 0.85
7.95 -/+ 1.00
8.25 -/+ 1.00
8.60 -/+ 1.00
8.55 -/+ 1.5
8.85 -/+ 1.5
9.65 -/+ 1.5
10.35 -/+ 1.5
10.65 -/+ 1.5
T
S
NOTE: Dimension in mm is typical, unless otherwise specified.
HF34 Series Thickness and Terminal Offset Dimensions
HF34 Series
T max
37.0 max
56 max
12.7 typ
3.7+/- 0.25
Dia 3.81 +/- 0.08
25.4 +/- 0.5
S
0.51 +/- 0.1
7.06 +/- 0.2
Part Type
T Body Thickness
(Max)
S Mounting
Terminal Offset
V111HF34
V131HF34
V141HF34
V151HF34
V181HF34
V201HF34
V251HF34
V271HF34
V301HF34
V321HF34
V331HF34
V351HF34
V391HF34
V421HF34
V441HF34
V481HF34
V511HF34
V551HF34
V571HF34
V661HF34
V681HF34
V751HF34
5.5
5.7
5.8
5.9
6.0
6.0
6.1
6.4
6.7
6.9
7.0
7.3
7.6
7.8
8.0
8.3
8.8
9.1
9.4
10.2
10.4
10.7
2.0 -/+ 0.65
2.1 -/+ 0.65
2.2 -/+ 0.65
2.4 -/+ 0.65
2.5 -/+ 0.65
2.6 -/+ 0.65
2.7 -/+ 0.85
2.9 -/+ 0.85
3.2 -/+ 0.85
3.4 -/+ 0.85
3.5 -/+ 0.85
3.9 -/+ 0.85
4.2 -/+ 0.85
4.4 -/+ 0.85
4.5 -/+ 0.85
4.8 -/+ 1.0
5.2 -/+ 1.0
5.5 -/+ 1.0
5.7 -/+ 1.5
6.5 -/+ 1.5
6.7 -/+ 1.5
7.3 -/+ 1.5
Note: Terminal Material Tin–plated Cover
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34.html or /hf34 or /hg34.thml
for current information.
173
Revision: November 5, 2009
HB34, HF34 and HG34 Varistor Series
HBx/HFx/HGx
HI–ENERGY MOV’S
Series
37.0 MAX
Varistor Products
Industrial High Energy Terminal Varistors > HB34, HF34 & HG34 Series
Dimensions (mm)
HG34 Series Thickness and Terminal Offset Dimensions
HG34 Series
T max
37.0 max
46 max
0.51 +/- 0.1
7.06 +/- 0.2
S
25.4 +/- 0.5
Dia 3.81 +/- 0.08
Note: Terminal Material Tin–plated Cover
Part Type
T Body Thickness
(Max)
S Mounting
Terminal Offset
V111HG34
V131HG34
V141HG34
V151HG34
V181HG34
V201HG34
V251HG34
V271HG34
V301HG34
V321HG34
V331HG34
V351HG34
V391HG34
V421HG34
V441HG34
V481HG34
V511HG34
V551HG34
V571HG34
V661HG34
V681HG34
V751HG34
5.5
5.7
5.8
5.9
6.0
6.0
6.1
6.4
6.7
6.9
7.0
7.3
7.6
7.8
8.0
8.3
8.8
9.1
9.4
10.2
10.4
10.7
6.0 -/+ 0.65
5.8 -/+ 0.65
5.6 -/+ 0.65
5.5 -/+ 0.65
5.4 -/+ 0.65
5.4 -/+ 0.65
5.2 -/+ 0.65
4.9 -/+ 0.65
4.7 -/+ 0.85
4.5 -/+ 0.85
4.4 -/+ 0.85
4.1 -/+ 0.85
3.8-/+ 0.85
3.5 -/+ 0.85
3.3 -/+ 0.85
3.1 -/+ 1.0
2.7 -/+ 1.0
2.4 -/+ 1.0
2.2 -/+ 1.5
1.4 -/+ 1.5
1.2 -/+ 1.5
0.6 -/+ 1.5
*Dimensions in mm.
Part Numbering System
V 25 1 HB 34
DISC SIZE (mm)
VARISTOR DESIGNATOR
SERIES DESIGNATOR
MAX AC RMS WORKING VOLTAGE
(First Significant Digits) VM(AC)
HB: HB34 Series
HF: HF34 Series
HG: HG34 Series
VM(AC VOLTAGE
DECADE MULTIPLIER
HB34, HF34 and HG34 Varistor Series
174
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/hb34 or /hf34 or /hg34.html
for current information.
Varistor Products
Industrial High Energy Terminal Varistors > DHB34 Series
RoHS
DHB34 Varistor Series
Description
The DHB34 Series of transient surge suppressors is
comprised of two industrial high-energy Metal-Oxide
Varistors (MOVs) discs placed in parallel as a single device.
They are designed to provide surge suppression in the
AC mains outdoor and service entrance environment
(distribution panels) of buildings. DHB34 applications
also include industrial heavy motors, controls, and power
supplies such as used in the oil-drilling, mining, and
transportation fields, including HVAC and motor/generator
applications.
The DHB34 Series provides rigid terminals for throughhole solder mounting on printed circuit boards, thereby
eliminating the need for screw mounting.
Agency Approvals
Agency File Number
Features
1449, E320116, 1414, E56529
LR91788
•
ROHS compliant
and Lead–free
•
Wide operating
voltage range
VM(AC)RMS 110V to 750V
•
High–energy
absorption
capability
WTM = 220J to 1050J
•
High peak pulse
current (Each of
two discs placed in
parallel) capability
ITM = 40,000A
•
Rigid terminals for
secure through-hole
solder mounting
•
No derating up to
85ºC ambient
•
Dual Disc Device two 34mm varistor
discs in parallel in
a single package.
HI–ENERGY
DHB34MOV’S
Series
Agency
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
DHB34 Series
Units
AC Voltage Range (VM(AC)RMS)
110 to 750
V
DC Voltage Range (VM(DC))
148 to 970
V
40000
A
Steady State Applied Voltage:
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
Single Pulse Energy Range
220 to 1050
J
Operating Ambient Temperature Range (TA)
For 2ms Current Wave (WTM)
-55 to + 85
ºC
Storage Temperature Range (TSTG)
-55 to + 125
ºC
<0.01
%/ºC
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
V
COATING Insulation Resistance
MΩ
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/dhb34.html for current information.
175
Revision: November 5, 2009
DHB34 Varistor Series
Varistor Products
Industrial High Energy Terminal Varistors > DHB34 Series
DHB34 Series Ratings & Specifications
Maximum Rating (85°C)
Lead–free
Model
and RoHS
Size
Compliant Models
Disc
Dia.
(mm)
Part Number
Continuous
Specifications (25°C)
Transient
Peak
Current
8 x 20μs
Varistor Voltage at 1mA
DC Test Current
Maximum
Clamping Voltage
VC at 200A
Current (8/20μs)
Typical
Capacitance
VRMS
VDC
Energy
(2ms)
VM(AC)
VM(DC)
WTM
ITM
Min
VN(DC)
Max
VC
f = 1MHz
V111DHB34
34
(V)
110
(V)
148
(J)
220
(A)
40,0001
(V)
156
(V)
173
(V)
190
(V)
288
(pF)
11,600
V131DHB34
34
130
175
270
40,0002
184
200
228
345
10,000
3
V141DHB34
34
140
188
291
40,000
198
220
248
375
9,000
V151DHB34
34
150
200
300
40,0004
212
240
268
405
8,000
V181DHB34
34
180
240
330
40,000
254
282
310
468
6,800
V201DHB34
34
200
265
350
40,000
283
314
345
533
6,350
V251DHB34
34
250
330
370
40,000
354
390
429
650
5,000
V271DHB34
34
275
369
400
40,000
389
430
473
730
4,500
V301DHB34
34
300
410
430
40,000
433
478
526
780
4,100
V321DHB34
34
320
420
460
40,000
462
510
561
830
3,800
V331DHB34
34
330
435
475
40,000
467
519
570
843
3,750
V351DHB34
34
350
460
500
40,000
495
550
604
894
3,600
V391DHB34
34
385
510
550
40,000
545
604
663
1,000
3,500
V421DHB34
34
420
560
600
40,000
610
680
748
1,130
3,000
V441DHB34
34
440
585
630
40,000
622
691
759
1,147
2,900
V481DHB34
34
480
640
650
40,000
670
750
825
1,240
2,700
V511DHB34
34
510
675
700
40,000
735
820
910
1,350
2,500
V551DHB34
34
550
710
755
40,000
778
864
949
1,404
2,390
V571DHB34
34
575
730
770
40,000
805
910
1000
1,480
2,200
V661DHB34
34
660
850
900
40,000
940
1050
1160
1,720
2,000
V681DHB34
34
680
875
925
40,000
962
1068
1173
1,777
1,900
V751DHB34
34
750
970
1050
40,000
1080
1200
1320
2,000
1,800
Note:
1. 40kA capability depends on applications rated up to 97VRMS. 30kA applies if > 97 VRMS.
2. 40kA capability depends on applications rated up to 115VRMS. 30kA applies if > 115 VRMS.
3. 40kA capability depends on applications rated up to 123VRMS. 30kA applies if > 123 VRMS.
4. 40kA capability depends on applications rated up to 132VRMS. 30kA applies if > 132 VRMS.
DHB34 Varistor Series
176
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/dhb34.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > DHB34 Series
Power Dissipation Ratings
PERCENT OF PEAK VALUE
Peak Pulse Current Test Waveform
100
90
50
10
O1
T
TIME
T1
T2
Figure 2
Figure 1
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
Should transients occur in rapid succession, the average
power 100 dissipation result is simply the energy
(watt-seconds) per pulse times the number of pulses
per second. The power so developed must be within
the specifications shown on the Device Ratings and
Specifications table for the specific device. The operating
values must be derated as shown in above.
Repetitive Surge Capability
Maximum Clamping Voltage
10000
50,000
20,000
10,000
V751
V661
V551
V681
V571
SURGE CURRENT (A)
V511
2
10
1000
V481
V141 V131
V111
V441
5,000
10 2
2,000
10 3
1,000
500
10 5
10 6
10 4
200
100
50
V151
V421
100
0.001
0.01
0.1
1
10
100
1000
10000
20
100000
10
Current - AMPS
Figure 3
V391
V351 V331 V321 V301 V271
Figure 4
V251 V201 V181
INDEFINITE
20
100
1,000
10,000
IMPULSE DURATION ( μs)
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
+/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not
prevent the device from continuing to function, and to provide ample protection.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/dhb34.html for current information.
177
Revision: November 5, 2009
DHB34 Varistor Series
HI–ENERGY
DHB34MOV’S
Series
Voltage VOLTS
DISC SIZE 34mm
V131DHB34 - V751DHB34
1
TA = -55 C to 85C
Maximum Clamping Voltage
DHB34 Series
110 to 750V AC Rating
Varistor Products
Industrial High Energy Terminal Varistors > DHB34 Series
Soldering Parameters
Lead–free Profile
Non Lead–free Profile
300
300
250
TEMPERATURE (ºC)
250
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
200
150
100
50
100
0
0
0.5
1
1.5
Figure 5
2
2.5
3
3.5
4
0
1
1.5
150°C
- Temperature Max (Ts(max))
200°C
- Time (min to max) (ts)
60 – 180 secs
Average ramp up–rate (Liquidus Temp (TL)
to peak
5°C/second max
TS(max) to TL - Ramp-up Rate
5°C/second max
- Temperature (TL) (Liquidus)
217°C
- Temperature (tL)
60 – 150 seconds
Peak Temperature (TP)
250+0/-5 °C
Time within 5°C of actual peak
Temperature (tp)
20 – 40 seconds
Ramp-down Rate
5°C/second max
Time 25°C to peak Temperature (TP)
8 minutes Max.
Do not exceed
260°C
2
2.5
3
3.5
4
TIME(MINUTES)
Physical Specifications
Pb – Free assembly
- Temperature Min (Ts(min))
DHB34 Varistor Series
0.5
Figure 6
TIME(MINUTES)
Reflow Condition
Reflow
150
50
0
Pre Heat
200
Lead Material
Tin–coated Copper
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Device Labeling
Marked with LF, voltage, amperage rating,
and date code.
Environmental Specifications
Operating/Storage
Temperature
-55°C to +85°C/-55°C to +125°C
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% Voltage change
Thermal Shock
+85°C to -40°C 10 times
+/-10% Voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
178
Revision: November 5, 2009
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Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/dhb34.html for current information.
Varistor Products
Industrial High Energy Terminal Varistors > DHB34 Series
Dimensions (mm)
T max
37.5 max
Table of Dimensions - Thickness and Terminal Offsets
56 max
12.7 typ
3.7 typ
Dia 3.81 +/- 0.08
S1
25.4 +/- 0.5
S2
0.51 typ
7.06 +/- 0.2
NOTE: Dimension in mm is typical, unless otherwise specified.
Part Type
T Max
S1 +/- 1.15
mm
S2 +/2.30mm
V111DHB34
7.6
2.65
5.50
V131DHB34
7.8
2.85
5.70
V141DHB34
8.2
3.00
6.00
V151DHB34
8.8
3.15
6.30
V181DHB34
9.0
3.25
6.50
V201DHB34
9.2
3.35
6.70
V251DHB34
9.10
3.00
6.00
V271DHB34
9.55
3.25
6.50
V301DHB34
10.20
3.50
7.00
V321DHB34
10.60
3.66
7.24
V331DHB34
10.65
3.70
7.40
V351DHB34
10.5
4.10
8.20
V391DHB34
11.2
4.45
8.90
V421DHB34
12.65
4.50
9.00
V441DHB34
12.80
4.55
9.10
V481DHB34
13.55
4.80
9.60
V511DHB34
13.4
5.25
10.50
V551DHB34
14.6
5.70
11.40
V571DHB34
14.8
5.80
11.60
V661DHB34
17.20
6.65
13.30
V681DHB34
17.5
7.00
14.00
V751DHB34
18.20
7.35
14.70
HI–ENERGY
DHB34MOV’S
Series
Part Numbering System
V 13 1DHB 34
VARISTOR DESIGNATOR
MAX AC RMS WORKING VOLTAGE
(FIRST SIGNIFICANT DIGITS) V M(AC)
DISC SIZE (mm)
SERIES DESIGNATOR
VM(AC) VOLTAGE DECADE MULTIPLIER
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/dhb34.html for current information.
179
Revision: November 5, 2009
DHB34 Varistor Series
Varistor Products
180
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
High Energy Industrial Disc Varistors > CA Series
CA Varistor Series
Description
The CA Series of transient surge suppressors are industrial
high-energy disc varistors (MOVs) intended for special
applications requiring unique electrical contact or packaging
methods provided by the customer. The electrode finish
of these devices is solderable and can also be used with
pressure contacts. Discs of the same diameter may be
stacked.
This series of industrial disc varistors are nominal 60mm
diameter, with disc thickness ranging from 2.0mm
minimum to 32mm maximum. The voltage range is 250V
to 2800 V(AC)RMS.
For information on soldering considerations, refer to EC637
"Recommendations for Soldering Terminal Leads to MOV
Varistor Discs."
Features
•
Standard disc size
nominal 60mm
diameter
•
High peak pulse
current range
50000A to 70000A
•
Discs have edge
passivation insulation
•
Very high–energy
capability Wtm
880J to 10000J
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
CA Series
Units
AC Voltage Range (VM(AC)RMS)
250 to 2800
V
DC Voltage Range (VM(DC))
330 to 3500
V
20,000 to 70,000
A
HI–ENERGY
CAMOV’S
Series
Steady State Applied Voltage:
Transient:
Peak Pulse Current (ITM)
For 8/20μs Current Wave(See Figure 2)
Single-Pulse Energy Range
880 to 10,000
J
Operating Ambient Temperature Range (TA)
For 2ms Current Square Wave (WTM)
-55 to +85
°C
Storage Temperature Range (TSTG)
- 55 to +85
°C
<0.01
%/°C
Temperature Coefficient (V) of Clamping Voltage (VC) at Specified Test Current
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ca.html for current information.
181
Revision: November 5, 2009
CA Varistor Series
Varistor Products
High Energy Industrial Disc Varistors > CA Series
CA Series Ratings & Specifications
Maximum Rating (85°C)
Continuous
Part
Number
Device Branding
Size
Specifications (25°C)
Transient
VRMS
VDC
Energy
(2ms)
Peak
Current
(8/20μs)
VM(AC)
VM(DC)
WTM
ITM
Varistor Voltage at 1mA
DC Test Current
Min
VNOM
Max Clamping
Volt Vc at 200A
Current
(8/20μs)
Typical
Capacitance
VC
f = 1MHz
Max
(mm)
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(A)
(pF)
V251CA60
60
250
330
880
50000
354
390
429
620
10000
V271CA60
60
275
369
950
50000
389
430
473
680
9000
V321CA60
60
320
420
1100
50000
462
510
561
760
7500
V421CA60
60
420
560
1500
70000
610
680
748
1060
6000
V481CA60
60
480
640
1600
70000
670
750
825
1160
5500
V511CA60
60
510
675
1800
70000
735
820
910
1300
5000
V571CA60
60
575
730
2100
70000
805
910
1000
1420
4500
V661CA60
60
660
850
2300
70000
940
1050
1160
1640
4000
V751CA60
60
750
970
2600
70000
1080
1200
1320
1880
3500
V881CA60
60
880
1150
3200
70000
1290
1500
1650
2340
2700
V112CA60
V142CA60
V172CA60
V202CA60
V242CA60
V282CA60
60
60
60
60
60
60
1100
1400
1700
2000
2400
2800
1400
1750
2150
2500
3000
3500
3800
5000
6000
7500
8800
10000
70000
70000
70000
70000
70000
70000
1620
2020
2500
2970
3510
4230
1800
2200
2700
3300
3900
4700
2060
2550
3030
3630
4290
5170
2940
3600
4300
5200
6200
7400
2200
1800
1500
1200
1000
800
NOTE: Average power dissipation of transients should not exceed 2.5W for CA60 discs.
Peak Pulse Current Test Waveform
Power Dissipation Ratings
PERCENT OF RATED VALUE
100
100
90
90
80
70
60
50
50
40
30
20
10
10
0
-55
Figure 1
O1
50
60
70
80
90
100 110 120 130 140 150
AMBIENT TEMPERATURE ( oC)
Figure 2
Should transients occur in rapid succession, the average power
dissipation result is the energy (watt-seconds) per pulse times
the number of pulses per second. The power so developed must
be within the specifications shown on the Device Ratings and
Specifications table for the specific device. Furthermore, the
operating values need to be derated at high temperatures as
shown in above. Because varistors can only dissipate a relatively
small amount of average power they are, therefore, not suitable
for repetitive applications that involve substantial amounts of
average power dissipation.
CA Varistor Series
T
T1
TIME
T2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
182
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ca.html for current information.
Varistor Products
High Energy Industrial Disc Varistors > CA Series
Maximum Clamping Voltage for 60mm Parts
Repetitive Surge Capability for 60mm Parts
V251CA60 - V321CA60
6,000
5,000
4,000
MAX CLAMPING VOLTAGE
DISC SIZE 60mm
250 TO 880VM(AC) RATING
3,000
TA = -55o C TO 85o C
1,000
900
800
700
600 V321CA60
500 V271CA60
V251CA60
5,000
10 2
2,000
10 3
1,000
10 4
500
10 5
200
100 10 6
400
50
300
200
10 -2
10 -1
10 0
Figure 3
10 1
10 2
PEAK AMPERES (A)
10 3
10 4
20
10
20
10 5
MAX CLAMPING VOLTAGE
DISC SIZE 60mm
1100 TO 2800VM(AC) RATING
50,000
TA = -55o C TO 85o C
10,000
20,000
SURGE CURRENT (A)
20,000
V282CA60
5,000 V242CA60
4,000 V202CA60
10,000
DISC SIZE 60mm
V421CA60 - V282CA60
1
10
5,000
10 2
2,000
10 3
1,000
10 4
500
10 5
2
200
100
20
V112CA60
10 -1
1,000
IMPULSE DURATION ( μs)
10 6
50
V172CA60
3,000 V142CA60
2,000
10 -2
100
V421CA60 - V282CA60
100,000
30,000
MAX PEAK VOLTS (V)
INDEFINITE
Figure 4
V112CA60 - V282CA60
Figure 5
DISC SIZE 60mm
V251CA60 - V321CA60
2
10
10,000
V881CA60
V751CA60
V661CA60
V571CA60
10,000
9,000
8,000
7,000
6,000
1
20,000
10 0
10 1
10 2
PEAK AMPERES (A)
10 3
10 4
10
20
10 5
Figure 6
INDEFINITE
100
1,000
IMPULSE DURATION ( μs)
10,000
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
+/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but does not prevent
the device from continuing to function, and to provide ample protection.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ca.html for current information.
183
Revision: November 5, 2009
CA Varistor Series
HI–ENERGY
CAMOV’S
Series
2,000
50,000
V511CA60
V481CA60
V421CA60
SURGE CURRENT (A)
MAXIMUM PEAK VOLTS (V)
V251CA60 - V881CA60
Varistor Products
High Energy Industrial Disc Varistors > CA Series
Physical Specifications
Environmental Specifications
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Operating/Storage
Temperature
-55°C to +85°C
Insulating Material
glass passivation on edge only
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% typical voltage change
Device Labeling
none
Thermal Shock
+85°C to -55°C 10 times
+/-10% typical voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
Product Dimensions (mm)
ELECTRODE
OPTIONAL
PASSIVATION
COLLAR
2.5 mm
0.1 inch
Weight
ELECTRODE
DIAMETER
(SEE TABLE)
THICKNESS
Disc Diameter
Model
Size
60
Model
VRMS
VM(AC)
Millimeters
Inches
Min
Max
Min
Max
58.0
62.0
2.283
2.441
Disc Thickness
Millmeters
Inches
Min.
Max.
Min.
Max.
250
2.0
2.7
0.079
0.106
275
2.2
3.0
0.087
0.118
320
2.6
3.5
0.102
0.138
420
3.5
4.7
0.138
0.185
510
4.2
5.7
0.165
0.224
575
4.6
6.3
0.181
0.248
660
5.3
7.2
0.209
0.283
750
6.1
8.3
0.240
0.327
880
7.3
10.3
0.287
0.406
1100
9.2
13.0
0.362
0.512
1400
11.5
16.0
0.453
0.630
1700
14.0
19.0
0.551
0.748
2000
17.0
22.5
0.669
0.886
2400
20.0
27.0
0.787
1.063
2800
24.0
32.0
0.945
1.260
CA Varistor Series
Model Number
Typical Discweight
(Grams)
V251CA60
39
V271CA60
42
V321CA60
50
V421CA60
66
V481CA60
71
V511CA60
80
V571CA60
88
V661CA60
101
V751CA60
116
V881CA60
141
V112CA60
178
V142CA60
220
V172CA60
265
V202CA60
317
V242CA60
377
V282CA60
450
184
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ca.html for current information.
Varistor Products
High Energy Industrial Disc Varistors > CA Series
Passivation Layer
Electrode Metallization
The standard CA Series is supplied with passivation
layer around the outside perimeter of the disc forming
an electrical insulator as detailed in the dimensional
drawing. For other options contact factory. (See Ordering
Information)
CA60 discs are supplied as standard with sintered Silver
electrodes. For other available options please contact
Littelfuse.
Recommended Reflow Temperature Profile
Encapsulated Recommendations
250
After lead attachment, the disc/lead assembly may be
coated or encapsulated in a package to provide electrical
insulation and isolation from environmental contamination
as required by the application. Coating/Filler materials for
containers may include silicones, polyurethanes, and some
epoxy resins. Materials containing halogens, sulfides, or
alkalines are not recommended.
TEMPERATURE ( oC)
200
150
100
50
Stacking and Contact Pressure Recommendations
When applications require the stacking of CA60 discs,
or when an electrical connection is made by pressure
contacts, the pressure applied to the CA60 disc electrode
surface should be minimum 2.2kgs (5 pounds) and
maximum 4N/CM2 (5.7LBs/IN2).
0
0
100
200
300
400
500
600
700
800
900
TIME (SEC)
Part Numbering System
Packaging and Shipping
The CA Series is supplied in bulk for shipment. Discs are
packaged in compartmentalized cartons to protect from
scratching or edge-chipping during shipment.
V 25 1 CA 60
VARISTOR DESIGNATOR
MAX AC RMS WORKING VOLTAGE
(FIRST SIGNIFICANT DIGITS) V M(AC)
No branding or any other type of marking appears on the
CA disc itself.
CA60 discs are supplied as standard with sintered Silver
electrodes and glass passivation. For other available
options please contact factory.
SERIES DESIGNATOR
DISC SIZE (mm) DIAMETER
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ca.html for current information.
185
Revision: November 5, 2009
CA Varistor Series
HI–ENERGY
CAMOV’S
Series
VM(AC) VOLTAGE DECADE MULTIPLIER
Varistor Products
186
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Axial Lead / Application Specific Varistors > MA Series
RoHS
MA Varistor Series
Description
The MA Series of transient surge suppressors are axial
lead Metal Oxide Varistors (MOVs) for use in a wide
variety of board level industrial and commercial electronic
equipment. They are intended to protect components and
signal/data lines from low energy transients where the
small axial lead package is required.
The MA Series is offered with standard ('S' suffix) or
tightened ('B' suffix) clamping voltage.
See MA Series Device Ratings and Specifications Table for
part number and brand information.
Agency Approvals
Agency
Features
Agency File Number
None
•
3mm diameter
disc size
•
Available in tape and
reel or bulk packaging
•
Small axial lead
package
•
No derating up to
85ºC ambient
•
Wide operating voltage
range:
VM(AC)RMS 9V to 264V
VM(DC)
13V to 365V
•
New black epoxy offers
improved performance
for high temperature
Lead-free wave
soldering process.
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
MA Series
Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
9 to 264
V
DC Voltage Range (VM(DC))
13 to 365
V
40 to 100
A
Transient:
Peak Pulse Current (ITM)
For 8/20μs Current Wave(See Figure 2)
For 2ms Current Square Wave (WTM)
0.06 to 1.7
J
Operating Ambient Temperature Range (TA)
-55 to +85
°C
Storage Temperature Range (TSTG)
-55 to +125
°C
<0.01
%/°C
1000
V
1000
MΩ
Temperature Coefficient (DV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
Dielectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
COATING Insulation Resistance
CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation
of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ma.html for current information.
187
Revision: November 5, 2009
MA Varistor Series
MA Series
Single-Pulse Energy Range
Varistor Products
Axial Lead / Application Specific Varistors > MA Series
MA Series Ratings & Specifications
Maximum Rating (85°C)
Continuous
Part
Number
Brand
(mm)
Specifications (25°C)
Transient
Peak
Current
(8/20μs)
Varistor Voltage at 1mA
DC Test Current
Max Clamping
Volt VC at 2.0A
(8/20μs)
Typical
Capacitance
VRMS
VDC
Energy
(10/1000μs)
VM(AC)
VM(DC)
WTM
ITM
Min
VN(DC)
Max
VC
f = 1MHz
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(A)
(pF)
V18MA1A
V18MA1A
V18MA1A
18A
18B
18C
9
10
10
13
14
14
0.06
0.07
0.06
40
40
40
14
15
15
18
18
18
23
21
21
49
44
49
550
550
550
V22MA1A
V22MA1B
V22MA1S
22A
22B
22S
10
14
14
15
18
18
0.09
0.10
0.09
40
40
40
16
19
19
22
22
22
28
26
26
55
51
55
410
410
410
V27MA1A
V27MA1B
V27MA1S
27A
27B
27S
13
17
17
19
22
22
0.10
0.11
0.10
40
40
40
21
24
24
27
27
27
34
31
31
67
59
67
370
370
370
V33MA1A
V33MA1B
V33MA1S
33A
33B
33S
18
20
20
23
26
26
0.13
0.15
0.14
40
40
40
26
29.5
29.5
33
33
33
40
36.5
36.5
73
67
73
300
300
300
V39MA2A
V39MA2B
V39MA2S
39A
39B
39S
22
25
25
28
31
31
0.16
0.18
0.17
40
40
40
31
35
35
39
39
39
47
43
43
86
79
86
250
250
250
V47MA2A
V47MA2B
V47MA2S
47A
47B
47S
27
30
30
34
38
38
0.19
0.21
0.19
40
40
40
37
42
42
47
47
47
57
52
52
99
90
99
210
210
210
V56MA2A
V56MA2B
V56MA2S
56A
56B
56S
32
35
35
40
45
45
0.23
0.25
0.23
40
40
40
44
50
50
56
56
56
68
62
62
117
108
117
180
180
180
V68MA3A
V68MA3B
V68MA3S
68A
68B
68S
38
40
40
48
56
56
0.26
0.30
0.27
40
40
40
54
61
61
68
68
68
82
75
75
138
127
138
150
150
150
V82MA3A
V82MA3B
V82MA3S
82A
82B
82S
45
50
50
60
66
66
0.33
0.37
0.34
40
40
40
65
73
73
82
82
82
99
91
91
163
150
163
120
120
120
V100MA4A
V100MA4B
V100MA4S
100
101
102
57
60
60
72
81
81
0.40
0.45
0.42
40
40
40
80
90
90
100
100
100
120
110
110
200
185
200
100
100
100
V120MA1A
V120MA2B
V120MA2S
120
121
122
72
75
75
97
101
101
0.40
0.50
0.46
100
100
100
102
108
108
120
120
120
138
132
132
220
205
220
40
40
40
V150MA1A
V150MA2B
150
151
88
92
121
127
0.50
0.60
100
100
127
135
150
150
173
165
255
240
32
32
V180MA1A
V180MA3B
180
181
105
110
144
152
0.60
0.70
100
100
153
162
180
180
207
198
310
290
27
27
V220MA2A
V220MA4B
220
221
132
138
181
191
0.80
0.90
100
100
187
198
220
220
253
242
380
360
21
21
V270MA2A
V270MA4B
270
271
163
171
224
235
0.90
1.00
100
100
229
243
270
270
311
297
460
440
17
17
V330MA2A
V330MA5B
330
331
188
200
257
274
1.00
1.10
100
100
280
297
330
330
380
363
570
540
14
14
V390MA3A
V390MA6B
390
391
234
242
322
334
1.20
1.30
100
100
331
351
390
390
449
429
670
640
12
12
V430MA3A
V430MA7B
430
431
253
264
349
365
1.50
1.70
100
100
365
387
430
430
495
473
740
700
11
11
NOTE: Average power dissipation of transients not to exceed 200mW.
MA Varistor Series
188
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ma.html for current information.
Varistor Products
Axial Lead / Application Specific Varistors > MA Series
Power Dissipation Ratings
Peak Pulse Current Test Waveform
PERCENT OF PEAK VALUE
PERCENT OF RATED VALUE
100
90
80
70
60
50
40
30
20
100
90
50
10
O1
10
T
TIME
T1
0
-55
50
60
Figure 1
T2
70 80 90 100 110 120 130 140 150
AMBIENT TEMPERATURE ( oC)
Figure 2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
Should transients occur in rapid succession, the average power
dissipation required is simply the energy (watt-seconds) per
pulse times the number of pulses per second. The power so
developed must be within the specifications shown on the
Device Ratings and Specifications table for the specific device.
Furthermore, the operating values need to be derated at high
temperatures as shown above. Because varistors can only
dissipate a relatively small amount of average power they are,
therefore, not suitable for repetitive applications that involve
substantial amounts of average power dissipation.
Repetitive Surge Capability
V18MA - V100MA
100
1
2
10
10 3
10 4
1
0.5
0.2
10
0.1
20
Figure 3
10 3
10 4
10 5
10 6
10 2
5
2
1
0.5
INDEFINITE
DISC SIZE 3mm
V120MA1A - V430MA7B
1
10
20
10 5
10 6
10 2
2
50
SURGE CURRENT (A)
SURGE CURRENT (A)
20
5
DISC SIZE 3mm
V18MA1A - V100MA4B
2
INDEFINITE
0.2
0.1
100
1,000
IMPULSE DURATION (μs)
20
10,000
100
1,000
IMPULSE DURATION (μs)
10,000
Figure 4
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
+/-10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not
prevent the device from continuing to function, and to provide ample protection.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ma.html for current information.
189
Revision: November 5, 2009
MA Varistor Series
MA Series
50
10
V120MA1A/S - V430MA3A
Varistor Products
Axial Lead / Application Specific Varistors > MA Series
Maximum Clamping Voltage
V18MA1B - V100MA4B
V18MA1A/S - V100MA4A/S
600
MAXIMUM PEAK VOLTS (V)
400
MAX CLAMPING VOLTAGE
DISC SIZE 3mm
18 TO 100V N(DC) RATING
TA = -55o C TO 85o C
600
500
400
V100MA4A/S
V82MA3A/S
V68MA3A/S
V56MA2A/S
MAXIMUM PEAK VOLTS (V)
800
300
200
150
100
80
60
V47MA2A/S
V39MA2A/S
V33MA1A/S
V27MA1A/S
V22MA1A/S
V18MA1A/S
40
30
20
10 -2
10 -1
Figure 5
10 0
PEAK AMPERES (A)
10 1
4,000
V430MA3A
V390MA3A
V330MA2A
V270MA2A
V220MA2A
3,000
1,000
800
600
400
200
V180MA1A
V150MA1A
V120MA1A/S
100
10 -2
Figure 7
MA Varistor Series
10 -1
10 -2
10 -1
10 0
10 1
PEAK AMPERES (A)
10 2
10 3
V120MA2B - V430MA7B
MAX CLAMPING VOLTAGE
DISC SIZE 3mm
120 TO 430VN(DC) RATING
TA = -55o C TO 85o C
1,500
V56MA2B
V47MA2B
V39MA2B
V33MA1B
V27MA1B
V22MA1B
V18MA1B
Figure 6
MAXIMUM PEAK VOLTS (V)
MAXIMUM PEAK VOLTS (V)
2,000
100
90
80
70
60
50
40
20
10 -3
10 2
V100MA4B
V82MA3B
V68MA3B
200
30
V120MA1A/S - V430MA3A
4,000
300
MAX CLAMPING VOLTAGE
DISC SIZE 3mm
18 TO 100V N(DC) RATING
TA = -55o C TO 85o C
10 0
PEAK AMPERES (A)
10 1
2,000
200
Figure 8
190
Revision: November 5, 2009
V430MA7B
V390MA6B
V330MA5B
V270MA4B
V220MA4B
V180MA3B
V150MA2B
V120MA2B
1,000
900
800
700
600
500
400
300
100
10 -3
10 2
MAXIMUM CLAMPING VOLTAGE
DISC SIZE 3mm
120 TO 430VN(DC) RATING
TA = -55o C TO 85o C
10 -2
10 -1
10 0
10 1
PEAK AMPERES (A)
10 2
10 3
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ma.html for current information.
Varistor Products
Axial Lead / Application Specific Varistors > MA Series
Wave Solder Profile
Non Lead–free Profile
Lead–free Profile
300
300
250
TEMPERATURE (ºC)
TEMPERATURE (ºC)
Maximum Wave 260C
Maximum Wave 240C
250
200
150
100
200
150
100
50
50
0
0
0
0.5
1
1.5
Figure 9
2
2.5
3
3.5
0
4
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Physical Specifications
Product Dimensions
L
L
D
b (diameter)
Symbol
0.5
Figure 10
TIME(MINUTES)
Lead Material
Tin–plated Copper clad steel
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Insulating Material
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements
Device Labeling
Marked with LF, voltage and date code
H
Inches
Millimeters
Min
Max
Min
Max
Øb
0.024
0.026
0.61
0.66
ØD
0.118
0.177
3.0
4.5
H
0.177
0.276
4.5
7.0
L
1.740
1.220
27.3
31.0
Environmental Specifications
Operating/Storage
Temperature
-40°C to +85°C
Passive Aging
+85°C, 1000 hours
+/-10% typical voltage change
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% typical voltage change
Thermal Shock
+85°C to -40°C 5 times
+/-10% typical voltage change
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
Typical Weight = 0.5g
Tape and Reel Dimensions
0.063” max
H2
0.200” +/- 0.02
MA Series
H1 = H2 +/- 0.040”
H1
Part Numbering System
0.080” max
V XXX MA XX
0.240”+/- 0.040
VARISTOR
2.062”+/- 0.059
ENERGY/CLAMPING
VOLTAGE VARIANT
2.681” max
VARISTOR VOLTAGE
(VN at 1mA)
Conforms to EIA Standard RS-296-E
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ma.html for current information.
191
Revision: November 5, 2009
SERIES DESIGNATOR
MA: Bulk Pack
MT: Tape and Reel
MA Varistor Series
Varistor Products
192
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Varistor Products
Low Profile / Application Specific Varistors > RA Series
RoHS
RA Varistor Series
Description
The RA Series transient surge suppressors are varistors
(MOVs) supplied in a low-profile box that features a precise
seating plane to increase mechanical stability for secure
circuit-board mounting. This feature makes these devices
suitable for industrial applications critical to vibration. Their
construction permits operation up to 125ºC (ambient)
without derating.
The RA Series are available in voltage ratings up to 275V
VM(AC)RMS, and energy levels up to 140J. These varistors are
used in automotive, motor-control, telecommunication, and
military applications.
Agency Approvals
Agency
See RA Series Device Ratings and Specifications Table for
part number and brand information.
Agency File Number
Features
E320116
•
Lead–free/RoHS
compliant parts
available (add
suffix "x2749")
•
Wide operating
voltage range:
VM(AC)RMS: 4 – 275V
VM(DC):
5.5 – 369V
•
Low profile outline with
precise seating plane
•
•
No derating up to
125ºC ambient
High energy absorption
capability W TM
up to 140J
•
•
In-line leads
3 model sizes available
A8, RA16, and RA22
LR91788
Absolute Maximum Ratings
• For ratings of individual members of a series, see Device Ratings and Specifications chart
Continuous
RA8 Series
RA16 Series RA22 Series
Units
Steady State Applied Voltage:
AC Voltage Range (VM(AC)RMS)
DC Voltage Range (VM(DC))
4 to 275
10 to 275
4 to 275
V
5.5 to 369
14 to 369
18 to 369
V
100 to 1200
1000 to 4500
2000 to 6500
A
Transients:
Peak Pulse Current (ITM)
For 8/20μs Current Wave (See Figure 2)
0.4 to 23
3.5 to 75
70 to 160
J
Operating Ambient Temperature Range (TA)
For 10/1000μs Current Wave (WTM)
-55 to +125
-55 to +125
-55 to +125
ºC
Storage Temperature Range (TSTG)
-55 to +150
-55 to +150
-55 to +150
ºC
<0.01
<0.01
<0.01
%/ºC
5000
5000
5000
V
1000
1000
1000
MΩ
Temperature Coefficient (aV) of Clamping Voltage (VC) at Specified Test Current
Hi-Pot Encapsulation (COATING Isolation Voltage Capability)
(Delectric must withstand indicated DC voltage for one minute per MIL-STD 202, Method 301)
COATING Insulation Resistance
CAUTION: Stresses above those listed in "Absolute Maximum Ratings" may cause permanent damage to the device. This is a stress only rating and
operation of the device at these or any other conditions above those indicated in the operational sections of this specification is not implied.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
193
Revision: November 5, 2009
RA Varistor Series
RA Series
Single Pulse Energy Range (Note 1)
Varistor Products
Low Profile / Application Specific Varistors > RA Series
RA Series Ratings & Specifications
Maximum Rating (125°C)
Continuous
Part
Number
Brand
Specifications (25°C)
Transient
Peak
Current
(8/20μs)
Varistor Voltage at 1mA
DC Test Current
Max Clamping
Volt VC at 2.0A
(8/20μs)
Typical
Capacitance
VRMS
VDC
Energy
(10/1000μs)
VM(AC)
VM(DC)
WTM
ITM
Min
VN(DC)
Max
VC
Ip
f = 1MHz
(mm)
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(V)
(A)
(pF)
V8RA8
8R
4
5.5
0.4
150
6
8.2
11.2
22
5
3000
V12RA8
12R
6
8
0.6
150
9
12
16
34
5
2500
V18RA8
18R
10
14
0.8
250
14.4
18
21.6
42
5
2000
14
18
(Note 3)
10
(Note 2)
250
18.7
22
26
47
5
1600
† RA8 Series
V22RA8
22R
V27RA8
27R
17
22
1.0
250
23
27
31.1
57
5
1300
V33RA8
33R
20
26
1.2
250
29.5
33
36.5
68
5
1100
V39RA8
39R
25
31
1.5
250
35
39
43
79
5
900
V47RA8
47R
30
38
1.8
250
42
47
52
92
5
800
V56RA8
56R
35
45
2.3
250
50
56
62
107
5
700
V68RA8
68R
40
56
3.0
250
61
68
75
127
5
600
V82RA8
82R
50
66
4.0
1200
74
82
91
135
10
500
V100RA8
100R
60
81
5.0
1200
90
100
110
165
10
400
V120RA8
120R
75
102
6.0
1200
108
120
132
205
10
300
V150RA8
150R
95
127
8.0
1200
135
150
165
250
10
250
V180RA8
180R
115
153
10.0
1200
162
180
198
295
10
200
V200RA8
200R
130
175
11.0
1200
184
200
228
340
10
180
†
V220RA8
220R
140
180
12.0
1200
198
220
242
360
10
160
†
V240RA8
240R
150
200
13.0
1200
212
240
268
395
10
150
†
V270RA8
270R
175
225
15.0
1200
247
270
303
455
10
130
†
V360RA8
360R
230
300
20.0
1200
324
360
396
595
10
100
†
V390RA8
390R
250
330
21.0
1200
354
390
429
650
10
90
†
V430RA8
430R
275
369
23.0
1200
389
430
473
710
10
80
V18RA16
18R16
10
14
3.5
1000
14.4
18
21.6
39
10
11000
V22RA16
22R16
14
18 (Note
3)
50 (Note
2)
1000
18.7
22
26
43
10
9000
V27RA16
27R16
17
22
5.0
1000
23
27
31.1
53
10
7000
V33RA16
33R16
20
26
6.0
1000
29.5
33
36.5
64
10
6000
V39RA16
39R16
25
31
7.2
1000
35
39
43
76
10
5000
V47RA16
47R16
30
38
8.8
1000
42
47
52
89
10
4500
V56RA16
56R16
35
45
10.0
1000
50
56
62
103
10
3900
V68RA16
68R16
40
56
13.0
1000
61
68
75
123
10
3300
† RA16 Series
V82RA16
82R16
50
66
15.0
4500
74
82
91
145
50
2500
V100RA16
100R16
60
81
20.0
4500
90
100
110
175
50
2000
V120RA16
120R16
75
102
22.0
4500
108
120
132
205
50
1700
V150RA16
150R16
95
127
30.0
4500
135
150
165
255
50
1400
V180RA16
180R16
115
153
35.0
4500
162
180
198
300
50
1100
RA Varistor Series
194
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
Varistor Products
Low Profile / Application Specific Varistors > RA Series
RA Series Ratings & Specifications
Maximum Rating (125°C)
Continuous
Brand
Part
Number
Specifications (25°C)
Transient
VRMS
VDC
Energy
(10/1000μs)
VM(AC)
VM(DC)
WTM
Peak
Current
(8/20μs)
ITM
Varistor Voltage at 1mA
DC Test Current
Min
VN(DC)
Max
Max Clamping
Volt VC at 2.0A
(8/20μs)
VC
Ip
Typical
Capacitance
f = 1MHz
(mm)
(V)
(V)
(J)
(A)
(V)
(V)
(V)
(V)
(A)
(pF)
V200RA16
200R16
130
175
38.0
4500
184
200
228
340
50
1000
†
V220RA16
220R16
140
180
42.0
4500
198
220
242
360
50
900
†
V240RA16
240R16
150
200
45.0
4500
212
240
268
395
50
800
†
V270RA16
270R16
175
225
55.0
4500
247
270
303
455
50
700
†
V360RA16
360R16
230
300
70.0
4500
324
360
396
595
50
550
†
V390RA16
390R16
250
330
72.0
4500
354
390
429
650
50
500
†
V430RA16
430R16
275
369
75.0
4500
389
430
473
710
50
450
†
RA22 Series
V24RA22
24R22
14
18
(Note 3)
100.0
(Note 2)
2000
19.2
24
(Note 4)
26
43
20
18000
V36RA22
36R22
23
31
160.0
(Note 2)
2000
32
36
(Note 4)
40
63
20
12000
†
V200RA22
200R22
130
175
70.0
6500
184
200
228
340
100
1900
†
V240RA22
240R22
150
200
80.0
6500
212
240
268
395
100
1600
†
V270RA22
270R22
175
225
90.0
6500
247
270
303
455
100
1400
†
V390RA22
390R22
250
330
130.0
6500
354
390
429
650
100
1000
†
V430RA22
430R22
275
369
140.0
6500
389
430
473
710
100
900
1.
2.
3.
4.
†
Average power dissipation of transients not to exceed 0.25W for RA8 Series, 0.60W for RA16 Series, or 1.0W for RA22 Series.
Energy ratings for impulse duration of 30ms minimum to one half of peak current value.
Also rated to withstand 24V for 5 minutes.
10mA DC Test Current.
Under UL File No. E320116 as a recognized component. CSA approved File No. LR91788.
Peak Pulse Current Test Waveform
Power Dissipation Ratings
100
PERCENT OF RATED VALUE
100
90
90
80
70
60
50
50
40
30
20
10
10
0
-55
Figure 1
50
60
70
80
90
100
110
120
130
O1
140 150
T1
AMBIENT TEMPERATURE ( oC)
Figure 2
Should transients occur in rapid succession, the average power
dissipation required is simply the energy (watt-seconds) per pulse
times the number of pulses per second. The power so developed
must be within the specifications shown on the Device Ratings
and Specifications table for the specific device. Furthermore,
the operating values need to be derated at high temperatures as
shown above. Because varistors can only dissipate a relatively
small amount of average power they are, therefore, not suitable
for repetitive applications that involve substantial amounts of average power dissipation.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
T
RA Series
NOTES:
TIME
T2
01 = Virtual Origin of Wave
T = Time from 10% to 90% of Peak
T1 = Rise Time = 1.25 x T
T2 = Decay Time
Example - For an 8/20 μs Current Waveform:
8μs = T1 = Rise Time
20μs = T2 = Decay Time
195
Revision: November 11, 2009
RA Varistor Series
Varistor Products
Low Profile / Application Specific Varistors > RA Series
Maximum Clamping Voltage for 8mm Parts
Repetitive Surge Capability for 8mm Parts
V8RA8 - V68RA8
V8RA8 - V12RA8
600
500
400
200
MAXIMUM CLAMPING VOLTAGE
8 TO 68VN(DC) RATING
TA = -55o C TO 125 o C
V8RA8 - V12RA8
1
100
2
10 4 5
10 6
10
10
50
200
SURGE CURRENT (A)
MAXIMUM PEAK VOLTS (V)
300
100
90
80
70
60
50
40
V68RA8
V56RA8
V47RA8
V39RA8
V33RA8
V27RA8
30 V22RA8
V18RA8
20
V12RA8
10 -1
10 0
10 1
10 2
20
100
1,000
IMPULSE DURATION (μs)
10,000
500
SURGE CURRENT (A)
V430RA8
V390RA8
V180RA8
V150RA8
V120RA8
V100RA8
100
10 -3
10 -2
2
10
100
V240RA8
V220RA8
V200RA8
V18RA8 - V68RA8
1
200
V270RA8
10 4 5
10 6
10
10 2
50
10 3
20
10
5
2
200
Figure 4
INDEFINITE
Figure 5
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55o C TO 125 o C
1,000
900
800
700
600
500
V360RA8
400
300
2
V18RA8 - V68RA8
( )
2,000
5
0.2
10 3
V82RA8 - V430RA8
3,000
10 3
10
1
PEAK AMPERES (A)
4,000
20
0.5
V8RA8
10
10 -2
10 -3
Figure 3
10 2
INDEFINITE
1
0.5
V82RA8
10 -1
10 0
10 1
10 2
PEAK AMPERES (A)
10 3
0.2
10
20
100
Figure 6
1,000
IMPULSE DURATION (μs)
10,000
V82RA8 - V430RA8
2,000
1
1,000
SURGE CURRENT (A)
V82RA8 - V430RA8
2
500
10 3
10 4
10 5
10 6
10
200
10 2
100
50
20
10
5
INDEFINITE
2
1
20
Figure 7
RA Varistor Series
196
Revision: November 5, 2009
100
1,000
10,000
IMPULSE DURATION (μs)
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
Varistor Products
Low Profile / Application Specific Varistors > RA Series
Maximum Clamping Voltage for 16mm Parts
Repetitive Surge Capability for 16mm Parts
V18RA16 - V68RA16
600
500
400
V18RA16 - V68RA16
1,000
MAXIMUM CLAMPING VOLTAGE
18 TO 68VN(DC) RATING
TA = -55o C TO 125 o C
SURGE CURRENT (A)
MAXIMUM PEAK VOLTS (V)
300
200
100
90
80
70
60
50
40
V68RA16
V56RA16
V47RA16
V39RA16
V33RA16
V27RA16
30 V22RA16
V18RA16
20
10 -3
10 -2
Figure 8
MAXIMUM PEAK VOLTS (V)
2,000
V180RA16
200
V150RA16
V120RA16
V100RA16
100
10 -3
10 -2
50
20
10
INDEFINITE
10 2
100
1,000
IMPULSE DURATION (μs)
10 3
10,000
Figure 10
V82RA16 - V430RA16
5,000
V240RA16
V220RA8
V200RA8
V430RA16
V390RA16
1
2,000
2
1,000
10
V82RA16 - V430RA16
10 2 3
10
10 4
10 5
10 6
500
200
100
50
20
10
INDEFINITE
5
V82RA16
10 -1
10 0
10 1
10 2
10 3
2
20
10 4
Figure 11
PEAK AMPERES (A)
100
1,000
10,000
IMPULSE DURATION (μs)
RA Series
Figure 9
100
1
20
10 -1
10 0
10 1
PEAK AMPERES (A)
MAXIMUM CLAMPING VOLTAGE
MODEL SIZE 5 x 8mm
82 TO 430VN(DC) RATING
TA = -55o C TO 125 o C
1,000
900
800
700
600
500
V360RA16
400
V270RA16
300
200 10 2
V18RA16 - V68RA16
2
SURGE CURRENT (A)
3,000
10 3
10 4
10 5
10 6
10
5
V82RA16 - V430RA16
4,000
1
2
500
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
197
Revision: November 5, 2009
RA Varistor Series
Varistor Products
Low Profile / Application Specific Varistors > RA Series
Maximum Clamping Voltage for 22mm Parts
Repetitive Surge Capability for 22mm Parts
V24RA22 - V36RA22
V24RA22 - V36RA22
MAXIMUM PEAK VOLTS (V)
200
2,000
MAXIMUM CLAMPING VOLTAGE
24 TO 36VN(DC) RATING
TA = -55o C TO 125 o C
100
90
80
70
60
1,000
SURGE CURRENT (A)
300
V36RA22
50
40
20
10 -3
10 -2
10 -1
10 0
10 1
PEAK AMPERES (A)
10 2
10 3
10 3
100
10 4
50
10 5
20
INDEFINITE
100
1,000
10,000
V200RA22 - V430RA22
10,000
MAXIMUM CLAMPING VOLTAGE
200 TO 430VN(DC) RATING
TA = -55o C TO 125 o C
2
V200RA22 - V430RA22
10
2,000
V430RA22
V390RA22
300
V270RA22
V240RA22
V200RA22
200
1
5,000
SURGE CURRENT (A)
MAXIMUM PEAK VOLTS (V)
200
10 6
Figure 14
1,000
900
800
700
600
500
400
Figure 13
V24RA22 - V36RA22
IMPULSE DURATION (μs)
4,000
100
10 -3
10 2
2
20
10 4
V200RA22 - V430RA22
2,000
1
5
Figure 12
3,000
500
10
V24RA22
30
2
10
1,000
500
10 2 3
10
10 4
10 5
10 6
200
100
50
20
INDEFINITE
10
5
2
1
10 -2
10 -1
10 0
10 1
10 2
PEAK AMPERES (A)
10 3
20
10 4
Figure 15
100
1,000
IMPULSE DURATION (μs)
10,000
NOTE: If pulse ratings are exceeded, a shift of VN(DC) (at specified current) of more than
±10% could result. This type of shift, which normally results in a decrease of VN(DC), may
result in the device not meeting the original published specifications, but it does not prevent
the device from continuing to function, and to provide ample protection.
RA Varistor Series
198
Revision: November 5, 2009
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Please refer to www.littelfuse.com/series/ra.html for current information.
Varistor Products
Low Profile / Application Specific Varistors > RA Series
Wave Solder Profile
Reflow Condition
- Temperature Min (Ts(min))
150°C
300
- Temperature Max (Ts(max))
200°C
250
- Time (min to max) (ts)
60 – 180 secs
Maximum Wave 260C
Average ramp–up rate (Liquidus Temp (TL)
to peak
5°C/second max
TS(max) to TL - Ramp-up Rate
5°C/second max
Reflow
- Temperature (TL) (Liquidus)
217°C
- Temperature (tL)
60 – 150 seconds
Peak Temperature (TP)
250+0/-5°C
Time within 5°C of actual peak
Temperature (tp)
20 – 40 seconds
Ramp-down Rate
5°C/second max
Time 25°C to peak Temperature (TP)
8 minutes Max.
Do not exceed
260°C
TEMPERATURE (ºC)
Pre Heat
Lead–free Profile
Pb – Free assembly
200
150
100
50
0
0
0.5
1
Figure 16
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Non Lead–free Profile
300
Maximum Wave 240C
TEMPERATURE (ºC)
250
200
150
100
50
0
0.5
1
1.5
2
2.5
3
3.5
4
TIME(MINUTES)
Environmental Specifications
Physical Specifications
Operating/Storage
Temperature
-55°C to +125°C / -55°C to +150°C
Lead Material
Tin–Coated Copper
Humidity Aging
+85°C, 85% RH, 1000 hours
+/-10% Voltage
Soldering
Characteristics
Solderability per MIL–STD–202,
Method 208E
Insulating Material
Thermal Shock
+85°C to -40°C 10 times
+/-10% Voltage
Cured, flame retardant epoxy polymer
meets UL94V–0 requirements.
Device Labeling
Marked with LF, voltage, amperage rating,
and date code.
Solvent Resistance
MIL–STD–202, Method 215F
Moisture Sensitivity
Level 1, J–STD–020C
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
199
Revision: November 5, 2009
RA Varistor Series
RA Series
0
Figure 17
Varistor Products
Low Profile / Application Specific Varistors > RA Series
Product Dimensions (mm)
D MAX
Y
n
MIN
A MAX
SEATING
PLANE
SYMBOL
RA8
Series
RA16
Series
RA22
Series
A (max.)
8.85
(0.348)
15.1
(0.594)
19.1
(0.752)
D (max.)
11.45
(0.450)
19.7
(0.776)
25.5
(1.004)
e
5
(0.197)
7.5
(0.295)
7.5
(0.295)
E (max.)
5.2
(0.205)
6.3
(0.248)
6.3
(0.248)
n (max.)
0.7
(0.027)
0.7
(0.027)
0.7
(0.027)
Øb
0.635
(0.025)
0.81
(0.032)
0.81
(0.032)
Weight
(typical)
1 Gram
3.4 Grams
4.4 Grams
X
2.2
(0.087)
2.2
(0.087)
4.4
(0.173)
Y
3.1 -/+ 0.5
(0.122 -/+
0.02)
6 -/+ 1
(0.236 -/+
0.04)
8.9 -/+ 1
(0.35 -/+ 0.04)
5.0 MIN
(0.197 MIN)
X
Øb
0.05
( 0.002)
E
MAX
0.5 MAX
OFFSET
(0.020 MAX)
e
1.0
( 0.039)
NOTES: Dimensions are in mm, with dimensions in inches in parentheses.
Inches for reference only.
Part Numbering System
The RA Series is supplied in bulk pack.
V 200 RA 16 X2749
Littelfuse
Varistor
Nominal
Varistor Voltage
RA Varistor Series
OPTIONAL SUFFIX:
X2749: Lead-Free and
RoHS Compliant Option
Device Size
Series Designator
200
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/ra.html for current information.
Varistor Products
High Reliability Varistors
MIL QPL
High Reliability Varistors
Description
DA Series
Littelfuse High Reliability Varistors offer the latest in
increased product performance, and are available for
applications requiring quality and reliability assurance levels
consistent with military or other standards (MIL-STD-19500,
MIL-STD-750, Method 202). Additionally, Littelfuse
Varistors are inherently radiation hardened compared
to Silicon Diode suppressors as illustrated in Figure 1.
ZA Series
Littelfuse High-Reliability Varistors involve five categories:
DB Series
1
DSSC Qualified Parts List (QPL) MIL-R-83530
(4 items presently available)
2
Littelfuse High Reliability Series TX Equivalents
(29 items presently available)
3
Custom Types
Agency Approvals
•
DSSC Approved
•
ISO Approved
•
QPL Listed
•
UL Recognized
•
CECC Certified
•
CSA Certified
Processed to customer-specific requirements
- (SCD) or to Standard Military Flow
4
Commercial Item Descriptors (CID)
identified for Government use:
CID AA-55564-3 - Littelfuse ZA Series
High Reliability MOVs
CID AA-55564-2 - Littelfuse DA, DB Series
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za hirel.html or /db hirel.html
for current information.
201
Revision: November 5, 2009
High Reliability Varistors
Varistor Products
High Reliability Varistors
1) DSSC Qualified Parts List (QPL) MIL-R-83530
This series of varistors are screened and conditioned in accordance with MIL-R-83530 as outlined in Table 2.
Manufacturing system conforms to MIL-I-45208; MIL-Q-9858.
Table 1. MIL-R-83530/1 Ratings and Characteristics
Part
Number
M83530/
Nominal
Varistor
Voltage
(V)
Tolerance
(%)
1-2000B
1-2200D
1-4300E
1-5100E
200
220
430
510
-/+10
+10, -5
+5, -10
+5, -10
Voltage Rating
(V)
(RMS)
(DC)
Energy
Rating
(J)
130
150
275
320
175
200
369
420
50
55
100
120
Clamping
Voltage
Capacitance
at 100A at 1MHz (pF)
(V)
325
360
680
810
3800
3200
1800
1500
Clamping
Voltage
At Peak
Current
Rating (V)
570
650
1200
1450
ITM (A)
Nearest
Commercial
Equivalent
6000
6000
6000
6000
V130LA20B
V150LA20B
V275LA40B
V320LA40B
Table 2. Mil-R-83530 Group A, B, and C Inspections
AQL
(Percent
Defective)
Major
Minor
Number
of Sample
Units
Failures
Allowed
High Temperature Life (Stabilization
Bake)
100%
-
-
-
-
Thermal Shock
100%
-
-
-
-
Inspection
Group A
SUBGROUP 1
Power Burn-In
100%
-
-
-
-
Clamping Voltage
100%
-
-
-
-
Nominal Varistor Voltage
100%
-
-
-
-
Visual and Mechanical Examination
-
1.0% AQL 7.6% LQ
25% AQL 13.0% LQ
Per Plan
-
Body Dimensions
-
Per Plan
-
Diameter and Length of Leads
-
Per Plan
-
Marking
-
Per Plan
-
Workmanship
-
Per Plan
-
SUBGROUP 2
SUBGROUP 3
Solderability
Group B
-
-
-
Per Plan
-
-
-
-
Per Plan
-
-
-
-
Per Plan
-
Terminal Strength (Lead Fatigue)
-
-
-
Per Plan
-
Moisture Resistance
-
-
-
Per Plan
-
Peak Current
-
-
-
Per Plan
-
Energy
-
-
-
Per Plan
-
High Temperature Storage
-
-
-
10
0
Operating Life (Steady State)
-
-
-
10
0
Pulse Life
-
-
-
10
0
Shock
-
-
-
10
0
Vibration
-
-
-
10
0
Constant Acceleration
-
-
-
10
0
Energy
-
-
-
10
0
SUBGROUP 1
Dielectric Withstanding Voltage
SUBGROUP 2
Resistance to Solvents
SUBGROUP 3
Group C
EVERY 3 MONTHS
High Reliability Varistors
202
Revision: November 5, 2009
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Please refer to www.littelfuse.com/series/za hirel.html or /db hirel.html
for current information.
Varistor Products
High Reliability Varistors
2) Littelfuse High Reliability Series TX Equivalents
TABLE 5. Available TX Model Types
Model Size
Device
Mark
(See Section
4) Nearest
Commercial
Equivalent
V130LTX2
V130LTX10A
V130LTX20B
7mm
14mm
20mm
130TX
130TX10
130TX20
V130LA2
V130LA10A
V130LA20A
V150LTX2
V150LTX10A
V150LTX20B
7mm
14mm
20mm
150TX
150TX10
150TX20
V150LA2
V150LA10A
V150LA20B
(See Section
4) Nearest
Commercial
Equivalent
TX Model
TX Model
Model Size
Device
Mark
V8ZTX1
V8ZTX2
7mm
10mm
8TX1
8TX2
V8ZA1
V8ZA2
V12ZTX1
V12ZTX2
7mm
10mm
12TX1
12TX2
V12ZA1
V12ZA2
V22ZTX1
V22ZTX3
7mm
14mm
22TX1
22TX3
V22ZA1
V22ZA3
V24ZTX50
20mm
24TX50
V24ZA50
V250LTX4
V250LTX20A
V250LTX40B
7mm
14mm
20mm
250TX
250TX20
250TX40
V250LA4
V250LA20A
V250LA40B
V33ZTX1
V33ZTX5
V33ZTX70
7mm
14mm
20mm
33TX1
33TX5
33TX70
V33ZA1
V33ZA5
V33ZA70
V420LTX20A
V420LTX40B
14mm
20mm
420TX20
420TX40
V420LA20A
V420LA40B
V68ZTX2
V68ZTX10
7mm
14mm
68TX2
68TX10
V68ZA2
V68ZA10
V480LTX40A
V480LTX80B
14mm
20mm
480TX40
480TX80
V480LA40A
V480LA80B
V82ZTX2
V82ZTX12
7mm
14mm
82TX2
82TX12
V82ZA2
V82ZA12
V510LTX40A
V510LTX80B
14mm
20mm
510TX40
510TX80
V510LA40A
V510LA80B
The TX Series of varistors are 100% screened and conditioned in accordance with MIL-STD-750.Tests are as outlined in Table 6.
INSPECTION LOTS
FORMED AFTER
ASSEMBLY
>
LOTS PROPOSED
FOR TX TYPES
>
100% SCREENING
REVIEW OF DATA
TX PREPARA TION
FOR DELIVERY
>
>
QA ACCEPTANCE
SAMPLE PER
APPLICABLE DEVICE
SPECIFICATION
TABLE 6. TX Equivalents Series 100% Screening
MIL-STD-105
LTPD
LEVEL
AQL
Electrical (Bidirectional)
VN(DC), VC (Per Specifications Table)
II
0.1
-
Dielectric Withstand Voltage
MIL–STD–202, Method 301, 2500V Min. at 1.0μADC
-
-
15
Solderability
MIL–STD–202, Method 208, No Aging, Non-Activated
-
-
15
TABLE 7. Quality Assurance Acceptance Test
Screen
High Temperature Life
(Stabilization Bake)
MIL-STD-750
Method
Condition
TX Requirements
1032
24 hours min at max rated storage temperature.
100%
1051
No dwell is required at 25°C. Test condition A1, 5 cycles -55°C to +125°C
(extremes) >10 minutes.
100%
Humidity Life
85°C, 85% RH, 168 Hrs.
100%
Interim Electrical VN(DC) VC
(Note 3)
As specified, but including delta parameter as a minimum.
(Temperature Cycling)
Power Burn-In
1038
Final Electrical +VN(DC) VC
(Note 3)
External Visual
Examination
Condition B, 85°C, rated VM(AC), 72 hours min.
As specified - All parameter measurements must be completed within 96
hours after removal from burn-in conditions.
2071
To be performed after complete marking.
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za hirel.html or /db hirel.html
for current information.
203
Revision: November 5, 2009
100% Screen
100%
100% Screen
100%
High Reliability Varistors
High Reliability MOVs
Thermal Shock
Varistor Products
High Reliability Varistors
3) Custom Types
In addition to our comprehensive high-reliability series, Littelfuse can screen and condition to specific requirements.
Additional mechanical and environmental capabilities are defined in Table 8.
TABLE 8. Mechanical And Environmental Capabilities (Typical Conditions)
Test Name
Terminal Strength
Test Method
Description
MIL-STD-750-2036
3 Bends, 90° Arc, 16oz. Weight
Drop Shock
MIL-STD-750-2016
1500g’s, 0.5ms, 5 Pulses, X1, V1, Z1
Variable Frequency Vibration
MIL-STD-750-2056
20g’s, 100-2000Hz, X1, V1, Z1
Constant Acceleration
MIL-STD-750-2006
V2, 20,000g’s Min
Salt Atmosphere
MIL-STD-750-1041
35°C, 24Hr, 10-50g/m2 Day
Soldering Heat/Solderability
MIL-STD-750-2031/2026
260°C, 10s, 3 Cycles, Test Marking
Resistance to Solvents
MIL–STD–202-215
Permanence, 3 Solvents
Flammability
MIL–STD–202-111
15s Torching, 10s to Flameout
Flammability
Cyclical Moisture Resistance
UL1414
MIL–STD–202-106
3 μ; 15s Torching
10 Days
Steady-State Moisture Resistance
MIL–STD–750-1021.3
85/85 96Hr
Biased Moisture Resistance
MIL–STD–750-1021.3
Not Recommended for High-Voltage Types
Temperature Cycle
MIL–STD–202-107
-55°C to 125°C, 5 Cycles
High-Temperature Life (Nonoperating)
MIL-STD-750-1032
125°C, 24Hr
Burn-In
MIL-STD-750-1038
Rated Temperature and VRMS
Hermetic Seal
MIL-STD-750-1071
Condition D
High Reliability Varistors
204
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za hirel.html or /db hirel.html
for current information.
Varistor Products
High Reliability Varistors
4) Commercial Items
The PIN number should be used to buy commercial product
to the CID. The manufacturer’s number shown should not
be used for ordering purposes.
The General Services Administration has authorized the
use of the Commercial Item Description (CID) for all
government agencies. There are three (3) listed series
within Littelfuse leaded/Industrial range:
PIN consists of abbreviated CID number + Applicable Sheet
(2 digits) + Dash number (-3 digits)
A-A-55564-3 (ZA Series)
A-A-55564-2 (DA/DB Series)
Example: AA55564 + 02 + -001 = AA5556402-001
Table 9. ZA Series A-A-55564-3
Dash Number
AA5556403–
Equiv. Littelfuse
Commercial Part
Dash Number
AA5556403–
Equiv. Littelfuse
Commerical Part
Dash Number
AA5556403–
Equiv.littelfuse
Commercial Part
001
V22ZA05
022
V47ZA1
043
V120ZA4
002
V22ZA1
023
V47ZA3
044
V120ZA6
003
V22ZA2
024
V47ZA7
045
V150ZA05
004
V22ZA3
025
V56ZA05
046
V150ZA1
005
V24ZA50
026
V56ZA2
047
V150ZA4
006
V27ZA05
027
V56ZA3
048
V150ZA8
007
V27ZA1
028
V56ZA8
049
V180ZA05
008
V27ZA2
029
V68ZA05
050
V180ZA1
009
V27ZA4
030
V68ZA2
051
V180ZA5
010
V27ZA60
031
V68ZA3
052
V180ZA10
011
V33ZA05
032
V68ZA10
053
V8ZA05
012
V33ZA1
033
V82ZA05
054
V8ZA1
013
V33ZA2
034
V82ZA2
055
V8ZA2
014
V33ZA5
035
V82ZA4
056
V12ZA05
015
V33ZA70
036
V82ZA12
057
V12ZA1
016
V36ZA80
037
V100ZA05
058
V12ZA2
017
V39ZA05
038
V100ZA3
059
V18ZA05
018
V39ZA1
039
V100ZA4
060
V18ZA1
019
V39ZA3
040
V100ZA15
061
V18ZA2
020
V39ZA6
041
V120ZA05
062
V18ZA3
021
V47ZA05
042
V120ZA1
063
V18ZA40
MFR’s Cage
S6019
Table 10. DA/DB Series A-A-55564-2
MFR’s Cage
Equiv. Littelfuse
Commercial Part
Dash Number
AA5556402–
MFR’s Cage
Equiv. Littelfuse
Commercial Part
001
V131DA40
012
V131DB40
002
V151DA40
013
V151DB40
003
V251DA40
014
V251DB40
004
V271DA40
015
V271DB40
V321DA40
016
V421DA40
017
V481DA40
018
005
006
S6019
007
V321DB40
S6019
V421DB40
V481DB40
008
V511DA40
019
V511DB40
009
V571DA40
020
V571DB40
010
V661DA40
021
V661DB40
011
V751DA40
022
V751DB40
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za hirel.html or /db hirel.html
for current information.
205
Revision: November 5, 2009
High Reliability Varistors
High Reliability MOVs
Dash Number
AA5556402–
Varistor Products
High Reliability Varistors
Radiation Hardness
For space applications, an extremely important property
of a protection device is its response to imposed radiation
effects.
Counterclockwise rotation of the V-I characteristics is
observed in Silicon devices at high neutron irradiation
levels; in other words, increasing leakage at low current
levels and increasing clamping voltage at higher current
levels.
Electron Irradiation
A Littelfuse MOV and a Silicon transient suppression diode
were exposed to electron irradiation. The V-I curves, before
and after test, are shown below.
The solid and open circles for a given fluence represent the
high and low breakdown currents for the sample of devices
tested. Note that there is a marked decrease in current (or
energy) handling capability with increased neutron fluence.
LITTELFUSE MOV
200
Failure threshold of Silicon semiconductor junctions is
further reduced when high or rapidly increasing currents
are applied. Junctions develop hot spots, which enlarge
until a short occurs if current is not limited or quickly
removed.
SILICON
TRANSIENT
SUPPRESSION
DIODE
V
100
80
60
PRE TEST
10 8 RADS,
18MeV ELECTRONS
40
The characteristic voltage current relationship of a P– N
Junction is shown below.
I
20
10 8
10 6
10 4
SATURATION
CURRENT
10 2
CURRENT (A)
FIGURE 1. RADIATION SENSITIVITY OF LITTELFUSE V130LA1
AND SILICON TRANSIENT SUPPRESSION DIODE
BREAKDOWN
VOLTAGE
It is apparent that the Littelfuse MOV was virtually
unaffected, even at the extremely high dose of 108 rads,
while the Silicon transient suppression diode showed a
dramatic increase in leakage current.
V
REDUCTION IN
FAILURE STRESSHOLD
BY RADIAL
Neutron Effects
SECONDARY
BREAKDOWN
A second MOV-Zener comparison was made in response
to neutron fluence. The selected devices were equal in
area.
REVERSE
BIAS
FIGURE 3. V-I CHARACTERISTIC OF PN-JUNCTION
Figure 2 shows the clamping voltage response of the MOV
and the Zener to neutron irradiation to as high as 1015 N/
cm2. It is apparent that in contrast to the large change in
the Zener, the MOV is unaltered. At highercurrents where
the MOV’s clamping voltage is again unchanged, the Zener
device clamping voltage increases by as much as 36%.
At low reverse voltage, the device will conduct very little
current (the saturation current). At higher reverse voltage
VBO (breakdown voltage),the current increases rapidly as
the electrons are either pulled by the electric field (Zener
effect) or knocked out by other electrons (avalanching). A
further increase in voltage causes the device to exhibit a
negative resistance characteristic leading to secondary
breakdown.
300
1.5K 200 INITIAL
200 VARISTOR V130A2
INITIAL AT 10 15
VOLTS
100
80
60
50
40
This manifests itself through the formation of hotspots,
and irreversible damage occurs. This failure threshold
decreases under neutron irradiation for Zeners, but not for
ZNO Varistors.
1.5K 200
AT 10 12
30
1.5K 200
AT 10 13
20
10
10
10
10 8
1.5K 200
AT 10 14
1.5K 200
AT 10 15
10 6
10 7
AMPERES
10 5
Gamma Radiation
10 4
Radiation damage studies were performed on type
V130LA2 varistors. Emission spectra and V-I characteristics
were collected before and after irradiation with 106 rads
Co60 gamma radiation. Both show no change, within
experimental error, after irradiation.
10 3
FIGURE 2. V-I CHARACTERISTIC RESPONSE TO NEUTRON
IRRADIATION FOR MOV AND ZENER DIODE
DEVICES
High Reliability Varistors
FORWARD
BIAS
206
Revision: November 5, 2009
©2009 Littelfuse, Inc.
Specifications are subject to change without notice.
Please refer to www.littelfuse.com/series/za hirel.html or /db hirel.html
for current information.
WWW.LITTELFUSE.COM
To assist you with your electronics design and selection processes,
Littelfuse also offers:
Comprehensive Online Product Specs on Littelfuse.com—Featuring easy-to-use
navigation, search and selection tools, as well as additional product details.
You can rely on Littelfuse.com for instant answers and continuously
up-to-date information..
Printed Product Catalogs—For offline and off-the-shelf convenience, our printed
product catalogs include data sheets, selection tables and tutorials covering all
of our core technologies. Contact your Littelfuse product representative or visit
www.littelfuse.com/catalogs to check availability.
Circuit Protection Design Guides—Our application design center website,
www.littelfuse.com/designcenter offers a wealth of circuit protection guidance
to help you select and apply the best circuit protection solution for your
application.
As the world's #1 brand in circuit protection Littelfuse offers the broadest
and deepest portfolio of circuit protection products and a global network
of technical support, backed by more than 80 years of application design
expertise. Visit our design support center to access:
> Reference Designs
> Application Notes
> Application Testing
> SPICE Models
> Local Technical Support
> Product Samples
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> Certification Documents
> Data Sheets
WWW.LITTELFUSE.COM/DESIGNSUPPORT
Littelfuse offers technologies that protect sensitive electronics and their users against electrostatic discharge (ESD), load switching,
lightning strikes, overloads, short circuits, power cross, ground faults and other threats.
Overcurrent protection products:
Fuses Littelfuse offers the world’s broadest range of fuse types and ratings, including
cartridge, leaded, surface mount and thin film designs
PTCs Positive Temperature Coefficient thermistor technology provides
PRODUCT
CATALOG
& DESIGN
resettable current-limiting protection
PRODUCT
CATALOG
& DESIGN
GUIDE
Overvoltage protection products:
UCT
UCT
DU
DUC
ROD
PRO
PRO
LOG
ALO
ATA
C
CAT
& DESIGN
GUIDE
Varistors Littelfuse offers surface mount Multi-Layer Varistors (MLVs) and
industrial Metal Oxide Varistors (MOVs) to protect against transients
GDTs Gas Discharge Tubes (GDTs) to dissipate voltage through
a contained plasma gas
Thyristors Littelfuse's solid state switches control the flow of current in
GUIDE
PRODUCT
CATALOG
& DESIGN
PRODUCT
CATA
GUID
E LOG
& DESIGN
ODUC
GUIDPR
E
T
CATA PR
LOG OD
UCT
& DESIGCA
N TALO
G
GUIDE
& DE
SIGN
GUID
E
DUCT
PRO
LOG
CATA
SIGN
& DE IDE
GU
Silicon
PulseGuard® ESD Suppressors
Produc Protection
Array
ts
(SPA)
e
be
T
Tub
rge Tu
Gas Discha ts
duc
(GDT) Pro
a wide range of appliances, tools and equipment
®
SIDACtor Devices Overvoltage protection specifically designed for telecom
fici
Coef
ture ucts
pera
Tem tor Prod
tive
is
Posi Therm
)
TC
(P
ent
and datacom requirements
TVS Diodes Silicon transient voltage suppression (TVS) devices
SPA™ Silicon Protection Arrays designed for analog and digital signal line protection
PulseGuard® ESD Suppressors Small, fast-acting Electrostatic Discharge (ESD) suppressors
To request catalogs for the Littelfuse portfolio of circuit protection technologies, please contact your authorized Littelfuse product
representative or visit our website at www.littelfuse.com/catalogs
©2008 Littelfuse, Inc.
Specifications descriptions and illustrative material in this literature are as accurate as known at the time of publication,
but are subject to changes without notice. Visit www.littelfuse.com for the most up-to-date technical information.
FORM NO. EC115
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