Prices as of April 16, 2014. Check Web site for most current prices.
75 Series Electromechanical Relay
Selection Guide
75 series relays are general purpose relays designed for a wide range of applications,
from power to sequence controls in various factory machines and control panels. They
are ideal for electrical control panels requiring stable and reliable relays.
Features
• LED indicator on all models, so you can
easily see if relay is working properly
without using a voltmeter
• A pushbutton allows manual operation
of the relay without the need for power
to the coil
• I.D. tag/write label for identifying relays in
multi-relay circuits
• Octal base design
• Silver Cadmium Oxide, gold flashed
contacts
• High open contact dielectric strength
(1,500 V rms)
• High reliability and long life
• High vibration and shock resistance
• Flag indicator shows relay status in
manual or powered condition
75 Series Relay Selection Guide
Part Number
750-2C-12D
750-2C-12A
750-2C-24D
750-2C-24A
750-2C-120A
750-2C-240A
750-3C-12D
750-3C-12A
750-3C-24D
750-3C-24A
750-3C-120A
750-3C-240A
Price
$7.25
Coil Voltage
12VAC
$8.25
24VDC
$8.25
24VAC
$8.25
120VAC
$8.50
220VAC
$8.25
12VDC
$10.50
12VAC
$9.25
24VDC
$9.50
24VAC
$9.50
120VAC
$10.00
240VAC
Order socket separately.
inches [mm]
Socket
Dimensions Relay
Part Number
Price
12VDC
$8.75
Dimensions
Configuration Contact Rating
DPDT
Figure 1
750-2C-SKT
$4.25
Figure 2
750-3C-SKT
$4.75
12A
3PDT
Wiring
750-2C-xxx wiring diagram
Figure 1: 750-2C-xxx
4
5
6
3
(A1)
2
7
1
8
(A2)
Note: Contacts and coil shown
are internal to the relay
750-3C-xxx wiring diagram
Figure 2: 750-3C-xxx
(A1)
4
3
2
5 6 7
1 11
8
9
10
(A2)
Note: Contacts and coil shown
are internal to the relay
Book 2 (14.1)
eRL-30
Relays and Timers
1-800-633-0405
Prices as of April 16, 2014. Check Web site for most current prices.
75 Series Electromechanical
Relay Specifications
Company
Information
Drives
Soft Starters
750-3C-240A
750-3C-120A
750-3C-24A
750-3C-12A
750-3C-24D
Motors
750-3C-12D
750-2C-240A
750-2C-120A
750-2C-24A
750-2C-24D
Part Numbers
750-2C-12A
750-2C-12D
75 Series Specification Table
Mechanical: 5 million operations, Electrical: 100,000 operations @ rated resistive load
20 ms
Sensors:
Encoders
3 G’s @ 10 to 55 Hz(0.6mm double amplitude)
10 G’s
Sensors:
Limit Switches
89 g (3.1 oz)
UL Recognized file E191059, CE, CSA Certified 244610
Sensors:
Current
IEC IP40
Sensors:
Pressure
Coil Specifications
LED Indicator
Coil Input Voltage
12VDC
12VAC
50/60 Hz
Coil Resistance
120q
18q
24VDC
470q
24VAC 120VAC 240VAC
50/60 Hz 50/60 Hz 50/60 Hz
72q
1.7kq
7.2kq
12VDC
12VAC
50/60 Hz
24VDC
120q
18q
470q
Power Consumption
3VA (60Hz) AC, 1.4W DC
Dropout Voltage
(% of rated voltage)
15% AC, 10% DC
Pull-in Voltage
24VAC 120VAC 240VAC
50/60 Hz 50/60 Hz 50/60 Hz
72q
1.7kq
7.2kq
Sensors:
Level
Pushbuttons
and Lights
Stacklights
110% of the rated coil voltage
Signal
Devices
Contact Specifications
Contact Type
Contact Material
Minimum Switching
Requirement
Contact Rating
Dielectric Strength Between
Contacts
Sensors:
Temperature
Sensors:
Flow Switches
Max. 85% of nominal voltage or less
Max. Voltage
(Max. continuous voltage)
Motor Controls
Sensors:
Photoelectric
-40°C to 55°C (-40°F to 131°F)
Standard
Motion: Servos
and Steppers
Sensors:
Proximity
General Specifications
Service Life
Operating Temperature
Response Time
Vibration Resistance
Shock Resistance
Weight
*Agency Approvals and
Standards
Environmental Protection
Power
Transmission
DPDT
3PDT
Process
Silver cadmium oxide, gold flashed
Relays and
Timers
100mA @ 5VDC
Refer to Contact Ratings chart
Pneumatics:
Air Prep
1500V rms
Pneumatics:
Directional Control
Valves
*Note: UL listed when used with sockets 750-2C-SKT, 750-3C-SKT. Current limited to rating of relay or socket, whichever is less.
Pneumatics:
Cylinders
75 Series Contact Ratings (current)
Resistive
Voltage
Nominal
UL
CSA
UL
28VDC
12A
12A
12A
---
120VAC
12A
12A
12A
1/3Hp
240VAC
12A
12A
12A
1/2Hp
www.automationdirect.com/relays
Pneumatics:
Tubing
Motor Load
Relays and Timers
Pneumatics:
Air Fittings
Appendix
Book 2
Terms and
Conditions
Book 2 (14.1)
eRL-31
Prices as of April 16, 2014. Check Web site for most current prices.
75 Series Socket Dimensions
Company
Information
Dimensions
Drives
inches [mm]
Soft Starters
Motors
Figure 3: 750-2C-SKT
Power
Transmission
Wiring
Motion: Servos
and Steppers
Motor Controls
Sensors:
Proximity
Sensors:
Photoelectric
Sensors:
Encoders
Sensors:
Limit Switches
Sensors:
Current
Sensors:
Pressure
Sensors:
Temperature
Sensors:
Level
Figure 4: 750-3C-SKT
Sensors:
Flow Switches
Wiring
Pushbuttons
and Lights
Stacklights
Signal
Devices
Process
Relays and
Timers
Pneumatics:
Air Prep
Pneumatics:
Directional Control
Valves
Pneumatics:
Cylinders
Pneumatics:
Tubing
Bus Connector
Pneumatics:
Air Fittings
Appendix
Book 2
Terms and
Conditions
Accessory
Part Number
Description
33-796-1
Coil bus connector used to connect multiple relays
in parallel. Package includes 5 pairs of bus bars to
connect up to 5 relays together.
www.automationdirect.com/relays
Price
$3.25
Relays and Timers
Book 2 (14.1)
eRL-35
Prices as of April 16, 2014. Check Web site for most current prices.
Packaged M.O.V.s and Diodes
Overview
Application
Metal Oxide Varistors (MOV) and
Diode circuits are offered as convenient
plug-in modules. Plugging a module
into the relay socket connects the circuit
in parallel with the relay coil. No additional wiring is required.
Many PLC systems control one or more
inductive load devices. These inductive
loads (devices with a coil) generate
transient voltages when they are de-energized with a relay contact. When a
relay contact is closed it “bounces”,
which causes the coil to energize and
de-energize until the “bouncing” stops.
The transient voltage which is generated is much larger in amplitude than
the supply voltage, especially with a
DC supply voltage.
Modules fit within the maximum dimensions of the relay and socket.
Features
•M
OVs protect by shunting potentially
damaging electrical spikes away from
the relay coil. Ideal for AC and DC
applications.
• Diodes protect external drive
circuitry from inductive voltages
generated when removing coil voltage.
I deal for DC applications.
Polarity sensitive.
When inductive load devices (motors,
motor starters, interposing relays,
solenoids, valves, etc.) are controlled
with relay contacts, it is recommended
that a surge suppression device be
connected directly across the coil of the
field device. If the inductive device has
plug-type connectors, the suppression
device can be installed on the terminal
block of the relay output.
When switching a DC-supplied inductive load the full supply voltage is always
present when the relay contact opens
(or “bounces”). When switching an
AC-supplied inductive load, if the
voltage is not zero when the relay
contact opens, there is energy stored
in the inductor that is released
when the voltage to the inductor is
suddenly removed. This release of
energy is what produces transient
voltages.
Metal oxide varistors (MOV) and
diodes are devices which provide good
surge and transient suppression of AC
and DC powered coils.
Protection Device Selection Guide
Nominal Input
Voltage
Part Number
Price
Description
AD-ASMD-250
$9.75
AD-ASMM-24
$8.00
AD-ASMM-120
$8.00
AD-ASMM-240
$8.00
Protection diode module for 784 and 75 series relays. Plug-in modules come in package
of 5.
MOV module for 784 and 75 series relays that operate at 24VAC coil voltage. Package
includes 5 modules.
MOV module for 784 and 75 series relays that operate at 120VAC coil voltage. Package
includes 5 modules.
MOV module for 784 and 75 series relays that operate at 240VAC coil voltage. Package
includes 5 modules.
AD-BSMD-250
$8.00
Protection diode module for 782 series relays. Plug-in modules come in package of 5.
6-250VDC
AD-BSMM-24
$8.00
24VAC/VDC
AD-BSMM-120
$8.00
AD-BSMM-240
$8.00
MOV module for 782 series relays that operate at 24VAC coil voltage. Package includes 5
modules.
MOV module for 782 series relays that operate at 120VAC coil voltage. Package includes 5
modules.
MOV module for 782 series relays that operate at 240VAC coil voltage. Package includes 5
modules.
Dimensions
& Package
Mating
Socket
6-250VDC
Figure 1
783-3C-SKT
784-4C-SKT-1
750-2C-SKT
750-3C-SKT
Figure 2
782-2C-SKT
24VAC/VDC
120VAC/VDC
240VAC/VDC
120VAC/VDC
240VAC/VDC
Accessory dimensions
inches [mm]
1.37
(34.7)
0.384
(9.82)
0.490
(12.4)
Relays and Timers
A2
0.900
(22.8)
Figure 1
Book 2 (14.1)
DIODE
M.O.V .
1.45
(38.8)
eRL-38
0.34
(8.63)
A1
A2
A1
Figure 2
1-800-633-0405