SMAJ TRANSIL™ A

SMAJ TRANSIL™ A
SMAJ
®
TRANSIL™
FEATURES
■ Peak Pulse Power : 400 W (10/1000µs)
■ Stand off voltage range:
From 5V to 188V
■ Uni and Bidirectional types
■ Low clamping factor
■ Fast response time
■ JEDEC registered package outline
A
K
Unidirectional
DESCRIPTION
The SMAJ series are TRANSILTM diodes designed specifically for protecting sensitive equipment against transient overvoltages. The SMA
package allows save spacing on high density
printed circuit boards.
Transil diodes provide high overvoltage protection
by clamping action. Their instantaneous response
to transient overvoltages makes them particularly
suited to protect voltage sensitive devices such as
MOS Technology and low voltage supplied IC’s.
Bidirectional
SMA
(JEDEC DO-214AC)
Table 1: Order Codes
Part Number
Marking
SMAJxxxA-TR
See page 2
SMAJxxxCA-TR
See page 2
Table 2: Absolute Maximum Rating (Tamb = 25°C)
Symbol
PPP
Parameter
Value
Unit
Peak pulse power dissipation (see note 1)
Tj initial = Tamb
400
W
Power dissipation on infinite heatsink
Tamb = 50°C
3.3
W
IFSM
Non repetitive surge peak forward
current for unidirectional types
tp = 10 ms
Tj initial = Tamb
40
A
Tstg
Tj
Storage temperature range
Maximum junction temperature
-65 to 175
150
°C
260
°C
Value
30
120
Unit
°C/W
°C/W
P
TL
Maximum lead temperature for soldering during 10 s.
Note 1: for a surge greater than the maximum values, the diode will fail in short-circuit.
Table 3: Thermal Resistances
Symbol
Parameter
Rth(j-l) Junction to leads
Rth(j-a) Junction to ambient on printed circuit on recommended pad layout
February 2006
REV. 8
1/6
SMAJ
Table 4: Electrical Characteristics
(Tamb = 25°C)
Symbol
Parameter
VRM
Stand-off voltage
VBR
Breakdown voltage
VCL
Clamping voltage
I
I
IF
IPP
VF
VCL VBR VRM
IRM
Leakage current
IPP
Peak pulse current
αT
Voltage temperature
coefficient
VF
Forward voltage drop
V
IR
IRM
VCLVBR VRM
IRM
IR
IPP
Unidirectional
IRM @ VRM VBR @ IR
Types
max
min
note2
IPP
VCL @ IPP
VCL @ IPP
max
max
10/1000µs
8/20µs
Unidirectional
Mark.
Bidirectional
Mark.
µA
V
V
mA
V
A
V
SMAJ5.0A-TR
SMAJ6.0A-TR
SMAJ6.5A-TR
SMAJ8.5A-TR
SMAJ10A-TR
SMAJ12A-TR
SMAJ13A-TR
SMAJ15A-TR
SMAJ18A-TR
SMAJ20A-TR
SMAJ22A-TR
SMAJ24A-TR
SMAJ26A-TR
SMAJ28A-TR
SMAJ30A-TR
SMAJ33A-TR
SMAJ40A-TR
SMAJ43A-TR
SMAJ48A-TR
SMAJ58A-TR
SMAJ70A-TR
SMAJ85A-TR
SMAJ100A-TR
SMAJ130A-TR
SMAJ154A-TR
SMAJ170A-TR
SMAJ188A-TR
AE
DUB
DUC
DUH
AX
DUK
BG
BM
DUQ
DUR
DUS
DUT
DUU
CG
CK
CM
DUZ
EUA
CX
EUF
EUI
EUL
EUN
EUQ
EUT
SR
EUV
SMAJ5.0CA-TR
SMAJ6.0CA-TR
SMAJ6.5CA-TR
SMAJ8.5CA-TR
SMAJ10CA-TR
SMAJ12CA-TR
SMAJ13CA-TR
SMAJ15CA-TR
SMAJ18CA-TR
SMAJ20CA-TR
SMAJ22CA-TR
SMAJ24CA-TR
SMAJ26CA-TR
SMAJ28CA-TR
SMAJ30CA-TR
SMAJ33CA-TR
SMAJ40CA-TR
SMAJ43CA-TR
SMAJ48CA-TR
SMAJ58CA-TR
SMAJ70CA-TR
SMAJ85CA-TR
SMAJ100CA-TR
SMAJ130CA-TR
SMAJ154CA-TR
SMAJ170CA-TR
SMAJ188CA-TR
AA
DBB
DBC
DBH
AC
DBK
BH
AJ
DBQ
DBR
DBS
DBT
DBU
CH
CL
CN
DBZ
EBA
CY
EBF
EBI
EBL
EBN
EBQ
EBT
SS
EBV
800
800
500
10
5
5
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
5.0
6.0
6.5
8.5
10
12
13
15
18
20
22
24
26
28
30
33
40
43
48
58
70
85
100
130
154
170
188
6.4
6.7
7.2
9.44
11.1
13.3
14.4
16.7
20
22.2
24.4
26.7
28.9
31.1
33.3
36.7
44.4
47.8
53.3
64.4
77.8
94.4
111
144
171
189
209
10
10
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
9.2
10.3
11.2
14.4
17
19.9
21.5
24.4
29.2
32.4
35.5
38.9
42.1
45.4
48.4
53.3
64.5
69.4
77.4
93.6
113
137
162
209
246
275
328
43.5
38.8
35.7
27.7
23.5
20.1
18.6
16.4
13.7
12.3
11.2
10.3
9.5
8.8
8.3
7.5
6.2
5.7
5.2
4.3
3.5
2.9
2.5
1.9
1.6
1.4
1.4
13.4
13.7
14.5
18.6
21.7
25.3
27.2
32.5
39.3
42.8
48.3
50
53.5
59
64.3
69.7
84
91
100
121
146
178
212
265
317
353
388
Note 2:
Note 3:
Note 4:
2/6
V
IRM
IR
Pulse test : tp < 50 ms.
∆VBR = αT * (Tamb - 25) * VBR(25°C).
VR = 0 V, F = 1 MHz. For bidirectional types, capacitance value is divided by 2.
VRMVBR VCL
Bidirectional
αT
C
max
note3
typ
note4
10-4/°C
174
5.7
170
5.9
160
6.1
124
7.3
106
7.8
91
8.3
85
8.4
71
8.8
59
9.2
54
9.4
48
9.6
46
9.6
43
9.7
39
9.8
36
9.9
33
10.0
27
10.1
25
10.2
23
10.3
19
10.4
16
10.5
13
10.6
11
10.7
9
10.8
7
10.8
6.5
10.8
6
10.8
A
pF
3500
3300
3100
2000
1550
1325
1200
975
800
725
625
600
575
510
480
450
370
350
320
270
230
200
170
145
125
120
110
SMAJ
Figure 1: Pulse waveform (10/1000µs)
Figure 2: Peak power dissipation versus initial
junction temperature
Figure 3: Peak pulse power versus exponential
pulse duration (Tj initial=25°C)
Figure 4: Clamping voltage versus peak pulse
current (Tj initial=25°C)
Exponential waveform tp=20ms & tp=1ms
Figure 5: Capacitance versus reverse applied
voltage (typical values) (SMAJxxA)
Figure 6: Capacitance versus reverse applied
voltage (typical values) (SMAJxxCA)
3/6
SMAJ
Figure 7: Peak forward voltage drop versus
peak forward current (typical values)
10.00
1.00
IFM(A)
Figure 8: Relative variation of thermal
impedance junction to ambient versus pulse
duration
1.00
Zth(j-a)/Rth(j-a)
Tj=125°C
0.10
Tj=25°C
0.10
VFM(V)
0.01
0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4
Figure 9: Thermal resistance junction to
ambient versus copper surface under each
lead (printed circuit board FR4 e(Cu)=35µm)
140
130
120
110
100
90
80
70
60
50
40
0.01
1E-2
tp(s)
1E-1
1E+0
1E+1
1E+2 5E+2
Figure 10: Relative variation of leakage current
versus junction temperature
IR[Tj] / IR [Tj=25°C]
Rth(j-a) (°C/W)
2E+3
1E+3
VBR ≥ 8.5V
1E+2
1E+1
VBR < 8.5V
1E+0
Tj(°C)
S(Cu)(cm²)
0
1
2
3
4
5
1E-1
0
25
50
75
100
Figure 11: Ordering Information Scheme
SM
Surface Mount
Peak Pulse Power
A = 400 W
Stand off voltage
85 = 85 V
Type
A = Unidirectinal
CA = Bidirectional
Packaging
TR = Tape & reel
4/6
A
J
85
CA
-
TR
125
150
SMAJ
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of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
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