Vehicle Relays | McMaster-Carr

	Switching Voltage Switching Voltage

12V DC

24V DC

36V DC

	Switching Current Switching Current

	Input Voltage Input Voltage

12V DC

24V DC

36V DC

	Number of Terminals Number of Terminals

	Industry Designation Industry Designation

SPST-NO

SPDT

	Switch Starting Position Switch Starting Position

1 Off (Normally Open)

1 Off (Normally Open) or 1 On
(Normally Closed)

	Mounting Location Mounting Location

Surface

Relay Socket

	Operation Type Operation Type

Mechanical

Solid State

	Width Width

	Mechanical Life Cycles Mechanical Life Cycles

100,000

250,000

10,000,000

	Number of Mounting Holes Number of Mounting Holes

	Height Height

	Depth Depth

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Mounting Hole Diameter Mounting Hole Diameter

0.22"

0.25"

0.28"

	Control Power Control Power

	Circuit Position Circuit Position

Off (Normally Open)

On (Normally Closed)

	Quick-Disconnect Tab Width Quick-Disconnect Tab Width

0.25"

0.375"

	Control Current Control Current

	Maximum Starting Current Maximum Starting Current

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

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39 Products

About Relays

5-Terminal Relay for Relay Socket

4-Terminal Relay for
Relay Socket and
Surface Mounting

5-Terminal Relay for Relay Socket and Surface Mounting

Relay Socket with Wire Leads

Relay Socket with Crimp-On Terminals

Also known as automotive relays, these relays can handle high starting (inrush) currents.

Relays for surface mounting have a tab for added security in high-vibration applications.

Relays
		Switching Current @ Voltage										Relay Sockets with Crimp-On Terminals		Relay Sockets with Wire Leads
Number of Terminals	Input Voltage	Off (Normally Open) Circuit Position	On (Normally Closed) Circuit Position	Max. Starting Current, A	Control Current, mA	Ht.	Wd.	Dp.	Quick-Disconnect Tab Wd.		Each		Each		Each
For Relay Socket
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
5	24V DC	20 A @ 24 V DC	__	120	69	1"	1"	0.9"	0.25"	0000000	00000	0000000	00000	0000000	000000
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT
5	12V DC	30 A @ 12 V DC	20 A @ 12 V DC	150	138	1.02"	1.02"	0.94"	0.25"	0000000	0000	0000000	0000	0000000	00000
5	24V DC	20 A @ 24 V DC	10 A @ 24 V DC	150	99	1"	1"	1"	0.25"	0000000	00000	0000000	0000	0000000	00000
For Relay Socket and Surface Mounting
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
4	12V DC	50 A @ 12 V DC	__	150	138	1.2"	1"	1"	0.25" and 0.375"	0000000	00000	0000000	0000	0000000	00000
4	24V DC	60 A @ 24 V DC	__	200	77	1.3"	1.4"	0.9"	0.25" and 0.375"	0000000	00000	0000000	0000	0000000	00000
5	12V DC	40 A @ 12 V DC	__	150	141	1"	1"	0.9"	0.25"	0000000	00000	0000000	0000	0000000	00000
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT
5	12V DC	30 A @ 12 V DC	20 A @ 12 V DC	150	138	1.1"	1.1"	1"	0.25"	0000000	0000	0000000	0000	0000000	00000
5	24V DC	20 A @ 24 V DC	10 A @ 24 V DC	120	109	1"	1"	0.9"	0.25"	0000000	0000	0000000	0000	0000000	00000

Weatherproof High-Starting-Current Vehicle Relays

Relay

Relay Socket with
Crimp-On
Terminals

Relay Socket with Wire Leads

The extended housing covers and protects terminals. Also known as automotive relays, they can handle high starting (inrush) currents. They have a tab for added security in high-vibration applications.

Relays
		Switching Current @ Voltage										Relay Sockets with Crimp-On Terminals		Relay Sockets with Wire Leads
Number of Terminals	Input Voltage	Off (Normally Open) Circuit Position	On (Normally Closed) Circuit Position	Max. Starting Current, A	Control Current, mA	Ht.	Wd.	Dp.	Quick-Disconnect Tab Wd.		Each		Each		Each
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT
5	12V DC	30 A @ 12 V DC	20 A @ 12 V DC	150	138	1.4"	1.4"	1.8"	0.25"	0000000	00000	0000000	000000	0000000	000000
5	24V DC	20 A @ 24 V DC	10 A @ 24 V DC	120	107	1.4"	1.4"	1.8"	0.25"	0000000	00000	0000000	0000	0000000	00000

Long-Life High-Starting-Current Vehicle Relays

Relay

Relay Socket with Wire Leads

Relay Socket with Crimp-On Terminals

With no moving parts, these solid state relays have an extended service life. They can handle high starting (inrush) currents. Also known as automotive relays.

Relays											Relay Sockets with Crimp-On Terminals		Relay Sockets with Wire Leads
Number of Terminals	Input Voltage	Switching Current @ 12V DC	Max. Starting Current, A	Control Current, mA	Ht.	Wd.	Dp.	Quick-Disconnect Tab Wd.		Each		Each		Each
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
4	12V DC	20A	80	10	1.1"	1.1"	1"	0.25"	0000000	000000	0000000	00000	0000000	000000

Water-Resistant High-Current Vehicle Relays

8VA and 12VA Control Power

8.1VA Control Power

These relays are suitable for DC-powered equipment such as forklifts, floor scrubbers, and trucks. Rated for continuous operation for cycles that run longer than 30 seconds.

For technical drawings and 3-D models, click on a part number.

1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
Number of Terminals	Input Voltage	Control Power, VA	Full Load Switching Current @ Voltage	Ht.	Wd.	Dp.	Wire Connection Type	Stud Thread Size		Each
4	12V DC	8	200 A @ 12 V DC	3.7"	3.3"	2.9"	Stud Terminals	5/16"-24	0000000	000000
4	12V DC	8.1	100 A @ 12 V DC	2.9"	3.3"	2.1"	Stud Terminals	5/16"-24	0000000	00000
4	24V DC	8.1	100 A @ 24 V DC	2.9"	3.3"	2.1"	Stud Terminals	5/16"-24	0000000	00000
4	36V DC	8.1	100 A @ 36 V DC	2.9"	3.3"	2.1"	Stud Terminals	5/16"-24	0000000	00000
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT
6	12V DC	12	100 A @ 12 V DC	4.6"	3.3"	2.9"	Stud Terminals	5/16"-24	0000000	00000
6	24V DC	12	100 A @ 24 V DC	4.6"	3.3"	2.9"	Stud Terminals	5/16"-24	0000000	00000

High-Current Vehicle Relays

12VA Control Power

9VA Control Power

These relays are suitable for DC-powered equipment such as forklifts, floor scrubbers, and trucks. They are rated for continuous operation for cycles that run longer than 30 seconds.

3-terminal relays require the same input and switching voltage. 4- and 6-terminal relays allow different input and switching voltages.

For technical drawings and 3-D models, click on a part number.

1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
Number of Terminals	Input Voltage	Control Power, VA	Full Load Switching Current @ Voltage	Ht.	Wd.	Dp.	Wire Connection Type	Stud Thread Size	Features		Each
3	12V DC	12	100 A @ 12 V DC	3.6"	3.1"	2.2"	Stud Terminals	5/16"-24	__	0000000	000000
4	12V DC	9	80 A @ 12 V DC	2.5"	3.5"	2.4"	Stud Terminals	5/16"-24	__	0000000	00000
4	12V DC	9	80 A @ 12 V DC	2.5"	3.5"	2.4"	Stud Terminals	5/16"-24	Grounding Cord with Ring Terminal	0000000	00000
4	12V DC	12	100 A @ 12 V DC	3.6"	3.1"	2.2"	Stud Terminals	5/16"-24	__	0000000	00000
4	24V DC	9	50 A @ 24 V DC	2.5"	3.5"	2.4"	Stud Terminals	5/16"-24	__	0000000	00000
4	24V DC	12	100 A @ 24 V DC	3.6"	3.1"	2.2"	Stud Terminals	5/16"-24	__	0000000	00000
4	36V DC	9	50 A @ 36 V DC	2.5"	3.5"	2.4"	Stud Terminals	5/16"-24	__	0000000	00000
4	36V DC	12	100 A @ 36 V DC	3.6"	3.1"	2.2"	Stud Terminals	5/16"-24	__	0000000	00000
1 Circuit Controlled with 1 Off (Normally Open) or 1 On (Normally Closed)—SPDT
6	12V DC	12	100 A @ 12 V DC	4.7"	3.1"	2.2"	Stud Terminals	5/16"-24	__	0000000	00000
6	24V DC	12	100 A @ 24 V DC	4.7"	3.1"	2.2"	Stud Terminals	5/16"-24	__	0000000	00000
6	36V DC	12	100 A @ 36 V DC	4.7"	3.1"	2.2"	Stud Terminals	5/16"-24	__	0000000	00000