10 Terminal Switches | McMaster-Carr

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	Number of Positions Number of Positions

	Actuator Style Actuator Style

	Rocker
	Rotary

	Switching Voltage Switching Voltage

	Number of Circuits Controlled Number of Circuits Controlled

	Number of Terminals Number of Terminals	Show

	Number of Terminals Number of Terminals	Hide

	Switch Action Switch Action

Stays Switched (Maintained)

Springs Back (Momentary)

	Position Designation Position Designation

(On)-Off-(On)

On-Off-On

On-On

	Mounting Location Mounting Location

	Input Voltage Input Voltage

	Industry Designation Industry Designation

	Switching Current Switching Current

	System of Measurement System of Measurement

Inch

	Shaft Diameter Shaft Diameter

1/8"

	Wire Connection Type Wire Connection Type

Quick-Disconnect Terminals

Screw Terminals

Screw-Clamp Terminals

Solder Pin Terminals

	Switch Type Switch Type

Manual

	For Panel Cutout Diameter For Panel Cutout Diameter

1/4"

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

DFARS Specialty Metals
COTS-Exempt

	Electrical Phase Electrical Phase

Three

Single

	Switch Starting Position Switch Starting Position

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

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

3 Off (Normally Open)

3 Off (Normally Open) and 1
On (Normally Closed)

4 Off (Normally Open)

	Illumination Illumination

Illuminated

	Bulb Voltage Bulb Voltage

	Depth Behind Panel Depth Behind Panel

1 1/16"

1 4/5"

2 9/16"

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

RoHS Compliant

RoHS Compliant with
Exemptions

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

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56 Products

Choosing an Electrical Switch

About Relays

Design-Your-Own Rocker Switches

Choose from a variety of messages and colored lenses to combine a rocker with a base for a complete switch.

Bases with an on-on position designation alternate power between sets of terminals.

Note: Illuminated switches include a bulb. If wiring the switch and the bulb to the same circuit, the circuit voltage must not exceed bulb voltage.

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

Illuminated Bases with Quick-Disconnect Terminals for 1 3/4" Ht.×7/8" Wd. Panel Cutout

Base

No. of Positions	Position Illuminated	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Position Designation	Color	Switching Current @ Voltage	Max. Voltage	Bulb Voltage	Quick-Disconnect Tab Wd.		Each
2	Top/Bottom	2	2 Off (Normally Open) or 2 On (Normally Closed)	Stays Switched (Maintained)	10	DPDT	On-On	Black	15 A @ 125 V AC, 15 A @ 28 V DC	30V DC 250V AC	14V DC	0.25"	0000000	000000
3	Top/Bottom	2	2 Off (Normally Open) or 2 On (Normally Closed)	Stays Switched (Maintained)	10	DPDT	On-Off-On	Black	15 A @ 125 V AC, 15 A @ 28 V DC	30V DC 250V AC	14V DC	0.25"	0000000	00000
3	Top/Bottom	2	2 Off (Normally Open) or 2 On (Normally Closed)	Springs Back (Momentary)	10	DPDT	(On)-Off-(On)	Black	15 A @ 125 V AC, 15 A @ 28 V DC	30V DC 250V AC	14V DC	0.25"	0000000	00000

22 mm Panel-Mount Build-Your-Own Plastic Switches

Choose an actuator and contact block to make your own switch. Actuators are rated NEMA 3S, 4X and 13 for protection from dust, outdoor environments, corrosion, oil, and washdowns. Use legend plates (not included) to label switches. BACO Controls switches are only compatible with BACO manufactured legend plates.

Contact blocks with mounting latch accept additional contact blocks to control more circuits.

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

Contact Blocks with Mounting Latch, Bulb, and Bulb Holder

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dp. Behind Panel	Wire Connection Type	Environmental Rating	Specifications Met	Choose a Bulb Voltage	Choose a Bulb Color		Each
4	2 Off (Normally Open) and 2 On (Normally Closed)	10	4PST-2NO/2NC	6 A @ 120 V AC, 2.5 A @ 24 V DC	600V AC 600V DC	2 9/16"	Screw Terminals	IP20	UL Listed, C-UL Listed, CE Marked	120V AC, 240V AC, 24V AC, 24V DC	Green, Red, White, Yellow	0000000	000000

Replacement Contact Retaining Clip

000000

Each

00000

Replacement Bulb Holders

Bulb Voltage	Bulb Type	Environmental Rating	Specifications Met	Choose a Bulb Color		Each
24V AC/24V DC	LED	IP20	UL Listed, C-UL Listed, CE Marked	Green, Red, White, Yellow	0000000	000000
120V AC	LED	IP20	UL Listed, C-UL Listed, CE Marked	Green, Red, White, Yellow	0000000	00000
240V AC	LED	IP20	UL Listed, C-UL Listed, CE Marked	Green, Red, White, Yellow	0000000	00000

Contact Blocks

No. of Circuits Controlled	Switch Starting Position	No. of Terminals	Industry Designation	Environmental Rating	Specifications Met		Each
1	1 Off (Normally Open)	2	SPST-NO	IP20	UL Listed, C-UL Listed, CE Marked	000000	00000

Rotary Switches

For 1/4" Panel Cutout Dia.

Control multiple devices with one switch. Turn the shaft to change switch positions. Each position closes a set of contacts per circuit, so you can select between multiple devices on one or more circuits.

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

						Shaft
No. of Circuits Controlled	Switch Action	No. of Positions	No. of Terminals	Dp. Behind Panel	O'all Dia.	Lg.	Dia.			Each
Nickel-Plated Brass with Black Plastic Knob
With Solder Pin Terminals for 1/4" Panel Cutout Dia.
2	Stays Switched (Maintained)	4	10	1 1/16"	9/16"	13/16"	1/8"	2 A @ 125 V AC, 1 A @ 30 V DC	0000000	000000

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 4 Off (Normally Open)—4PST-NO
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
10	24V DC	13	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	0000000	00000
4 Circuits Controlled with 2 Off (Normally Open) and 2 On (Normally Closed)—4PST-2NO/2NC
10	24V DC	13	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	0000000	00000
4 Circuits Controlled with 3 Off (Normally Open) and 1 On (Normally Closed)—4PST-3NO/1NC
10	24V DC	13	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	0000000	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

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
4 Circuits Controlled with 3 Off (Normally Open) and 1 On (Normally Closed)—4PST-3NO/1NC
10	24V AC	125	10A	2.3"	1.7"	2.2"	35	UL Listed, C-UL Listed	00000000	00000
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

DIN-Rail Mount Infrequent-Cycle High-Current Relays

Mount these relays directly to 35 mm DIN rail. For use with equipment that cycles on and off, they meet UL 508 for air conditioning and heating. All have recessed terminals to prevent contact with live connections. Also known as definite-purpose contactors.

Auxiliary contacts allow you to add a signaling device or control another relay.

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

3 Circuits

			Switching Current @ 600V AC		hp @ Switching Voltage
Number of Terminals	Input Voltage	Control Power	Full Load	Resistive Load	Single Phase	Three Phase	Ht.	Wd.	Dp.	Specifications Met		Each
Relays
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO
10	24V AC	6.5VA	40A	50A	3 hp @ 120 V AC 7 1/2 hp @ 240 V AC	10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	3.5"	UL Listed C-UL Listed UL 508	00000000	000000
10	24V AC	6.5VA	50A	55A	3 hp @ 120 V AC 10 hp @ 240 V AC	15 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	3.5"	UL Listed C-UL Listed UL 508	00000000	000000
10	120V AC	6.5VA	40A	50A	3 hp @ 120 V AC 7 1/2 hp @ 240 V AC	10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	3.5"	UL Listed C-UL Listed UL 508	00000000	00000
10	120V AC	6.5VA	50A	55A	3 hp @ 120 V AC 10 hp @ 240 V AC	15 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	3.5"	UL Listed C-UL Listed UL 508	00000000	000000
10	230V AC	6.5VA	40A	50A	3 hp @ 120 V AC 7 1/2 hp @ 240 V AC	10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	3.5"	UL Listed C-UL Listed UL 508	00000000	00000
10	230V AC	6.5VA	50A	55A	3 hp @ 120 V AC 10 hp @ 240 V AC	15 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	3.5"	UL Listed C-UL Listed UL 508	00000000	000000
10	24V DC	5.4W	40A	50A	3 hp @ 120 V AC 7 1/2 hp @ 240 V AC	10 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	4.2"	UL Listed C-UL Listed UL 508	0000000	000000
10	24V DC	5.4W	50A	55A	3 hp @ 120 V AC 10 hp @ 240 V AC	15 hp @ 240 V AC 30 hp @ 480 V AC 40 hp @ 600 V AC	3.5"	1.8"	4.2"	UL Listed C-UL Listed UL 508	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
2	1 Off (Normally Open) and 1 On (Normally Closed)	DPST-1NO/1NC	Side	00000000	00000

DIN-Rail Mount Long-Life High-Current Relays

With no moving parts, these solid state relays have an extended service life. Mount them directly to 35 mm DIN rail. They have an integrated heat sink that disperses heat to provide optimal convection cooling. An LED indicator tells you if they are open or closed. Relays are rated for continuous operating duty. They do not switch DC loads.

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

3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO
Number of Terminals	Input Voltage	Control Current, mA	Full Load Switching Current @ 600V AC	hp @ Switching Voltage	Ht.	Wd.	Dp.	Specifications Met		Each
Three Phase
10	5-32V DC	10	40A	5 hp @ 230 V AC 10 hp @ 480 V AC	5.3"	2.1"	4.7"	UL Listed C-UL Listed CE Marked	0000000	0000000
10	5-32V DC	10	65A	10 hp @ 230 V AC 20 hp @ 480 V AC	5.6"	2.8"	5.6"	UL Listed C-UL Listed CE Marked	0000000	000000
10	20-275V AC/24-190V DC	1	65A	10 hp @ 230 V AC 20 hp @ 480 V AC	5.6"	2.8"	5.6"	UL Listed C-UL Listed CE Marked	0000000	000000
10	20-275V AC/24-190V DC	2	40A	5 hp @ 230 V AC 10 hp @ 480 V AC	5.3"	2.1"	4.7"	UL Listed C-UL Listed CE Marked	0000000	000000

High-Current Relays

3 Circuits

Use these relays with large motors and lighting systems. Also known as IEC contactors, they are built to International Electrotechnical Commission (IEC) dimensional standards. All have recessed terminals to prevent contact with live connections. Mount to 35 mm DIN rail.

Auxiliary contacts allow you to add a signaling device or control another relay. Add one front-mount contact per relay or two side-mount contacts per relay.

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

			Switching Current @ 600V AC		hp @ Switching Voltage
Number of Terminals	Input Voltage	Control Power	Full Load	Resistive Load	Single Phase	Three Phase	Ht.	Wd.	Dp.	Specifications Met		Each
3 Circuits Controlled with 3 Off (Normally Open)—3PST-NO
With 1 Auxiliary Contact—1 Off (Normally Open)
10	24V AC	4VA	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	000000000	000000
10	120V AC	4VA	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	000000000	00000
10	240V AC	4VA	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	000000000	00000
10	24V DC	3.2W	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	00000000	00000
With 1 Auxiliary Contact—1 On (Normally Closed)
10	24V AC	4VA	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	000000000	00000
10	120V AC	4VA	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	000000000	00000
10	240V AC	4VA	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	000000000	00000
10	24V DC	3.2W	6A	20A	1/2 hp @ 120 V AC 1 1/2 hp @ 240 V AC	3 hp @ 240 V AC 5 hp @ 480 V AC 5 hp @ 600 V AC	2.3"	1.7"	2.2"	UL Listed C-UL Listed	00000000	00000

Front-Mount Auxiliary Contact for Relays Rated 6 Full-Load Amps—1 Off (Normally Open) and 1 On (Normally Closed)

00000000

Each

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
4 Circuits Controlled with 3 Off (Normally Open) and 1 On (Normally Closed)—4PST-3NO/1NC
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	00000
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
4 Circuits Controlled with 4 Off (Normally Open)—4PST-NO
With Screw Terminals
10	120V AC	22	25 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
10	240V AC	11	25 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
10	24V DC	83	25 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

Latching Relays

10-Terminal Relay

10-Terminal Relay Socket

A single, momentary input voltage switches these relays and latches them in position, so they don't require a constant input voltage to stay switched. A second momentary voltage will release the latch.

Relay sockets (sold separately) mount to 35 mm DIN rail.

Relays											Relay Sockets
Number of Terminals	Input Voltage	Control Current, mA	Switching Current @ 240V AC/28V DC	Ht.	Wd.	Dp.	Quick-Disconnect Tab Wd.	Specifications Met		Each		Each
2 Circuits Controlled with 2 Off (Normally Open) or 2 On (Normally Closed)—DPDT
10	24V AC	27	5A	1.1"	0.8"	1.4"	0.102"	UL Recognized Component CSA Certified	0000000	0000000	0000000	000000
10	12V DC	110	5A	1.1"	0.8"	1.4"	0.102"	UL Recognized Component CSA Certified	0000000	00000	0000000	00000
10	24V DC	52	5A	1.1"	0.8"	1.4"	0.102"	UL Recognized Component CSA Certified	0000000	00000	0000000	00000