4PST-2NO/2NC Relays | McMaster-Carr

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	Input Voltage Input Voltage

24V AC

120V AC

240V AC

24V DC

	Industry Designation Industry Designation	Show

4PST-2NO/2NC

	Industry Designation Industry Designation	Hide

	Switch Starting Position Switch Starting Position

2 Off (Normally Open) and 2
On (Normally Closed)

	Switching Voltage Switching Voltage

220V AC

600V AC

24V DC

	Mounting Location Mounting Location

DIN Rail

Surface

	Number of Circuits Controlled Number of Circuits Controlled

	Switching Current Switching Current

10A

25A

	Wire Connection Type Wire Connection Type

	Screw Terminals

	Width Width

1.7"

	Relay Type Relay Type

	Standard

	Control Current Control Current

	Depth Depth

2.2"

2 1/2"

	Mechanical Life Cycles Mechanical Life Cycles

1,000,000

20,000,000

	Application Application

Power

	Switch Action Switch Action

Springs Back (Momentary)

	Number of Terminals Number of Terminals

	Mounting Hole Diameter Mounting Hole Diameter

0.17"

0.18"

	Number of Mounting Holes Number of Mounting Holes

	Specifications Met Specifications Met

CSA

CE Marked

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

DFARS Specialty Metals
COTS-Exempt

	Height Height

1.4"

2.3"

	Circuit Position Circuit Position

Off (Normally Open)

On (Normally Closed)

	Operation Type Operation Type

Mechanical

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About Relays

Screw Terminal Relays

Recessed screw terminals prevent accidental contact with live connections. These relays are built to International Electrotechnical Commission (IEC) dimensional standards.

Auxiliary contact (sold separately) allows you to add a signaling device or control another relay.

4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC
Number of Terminals	Input Voltage	Control Current, mA	Switching Current @ 600V AC	Ht.	Wd.	Dp.	For DIN Rail Size, mm	Specifications Met		Each
10	24V DC	13	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	0000000	000000

Auxiliary Contacts

Number of Circuits Controlled	Switch Starting Position	Industry Designation	Mounting Location		Each
2	1 Off (Normally Open) and 1 On (Normally Closed)	DPST-1NO/1NC	Front	00000000	000000

Machine-Guard Safety Screw Terminal Relays

The interlocked opposing contacts won't close at the same time, so these relays are suitable for safety applications such as machine guarding. The screw terminals are recessed to prevent accidental contact with live connections. Relays are built to International Electrotechnical Commission (IEC) dimensional standards.

Auxiliary contact (sold separately) allows you to add a signaling device or control another relay.

4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC
Number of Terminals	Input Voltage	Control Current, mA	Switching Current @ 600V AC	Ht.	Wd.	Dp.	For DIN Rail Size, mm	Specifications Met		Each
10	24V AC	125	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	00000000	000000
10	120V AC	25	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	00000000	00000
10	240V AC	12.5	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	00000000	00000

Auxiliary Contacts

Number of Circuits Controlled	Switch Starting Position	Industry Designation	Mounting Location		Each
2	1 Off (Normally Open) and 1 On (Normally Closed)	DPST-1NO/1NC	Front	00000000	000000

Enclosed Medium-Current Relays

4 Circuits

The built-in enclosure protects contacts from dust and dirt. These relays accept voltage drops up to 50% of the rated voltage without switching. Use them with industrial automation systems, security and emergency lighting, and small motors. Also known as power relays.

			Switching Current @ Voltage
Number of Terminals	Input Voltage	Control Current, mA	Off (Normally Open) Circuit Position	On (Normally Closed) Circuit Position	hp @ Switching Voltage	Ht.	Wd.	Dp.	Specifications Met		Each
4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC
With Screw Terminals
10	120V AC	22	25 A @ 220 V AC/24 V DC	8 A @ 220 V AC/24 V DC	1 1/2 hp @ 120 V AC 3 hp @ 240 V AC 3 hp @ 277 V AC	1.4"	2"	2.5"	UL Recognized Component, CSA Certified, CE Marked	0000000	000000
10	24V DC	83	25 A @ 220 V AC/24 V DC	8 A @ 220 V AC/24 V DC	1 1/2 hp @ 120 V AC 3 hp @ 240 V AC 3 hp @ 277 V AC	1.4"	2"	2.5"	UL Recognized Component, CSA Certified, CE Marked	0000000	00000