7A Switches | McMaster-Carr

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40 Products

Choosing an Electrical Switch

These switches meet MIL-S-3950. A rubber seal protects them from washdowns.

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

2 Position
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Position Designation	Switching Current @ Voltage	Max. Voltage	Dp. Behind Panel	Mounting Hardware Included	Wire Connection Type		Each
For 1/2" Panel Cutout Dia.
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST	Off-(On)	7 A @ 125 V AC, 10 A @ 28 V DC	28V DC 125V AC	1.16"	Yes	Screw Terminals	00000000	000000
1	1 On (Normally Closed)	Springs Back (Momentary)	2	SPST	On-(Off)	7 A @ 125 V AC, 10 A @ 28 V DC	28V DC 125V AC	1.16"	Yes	Screw Terminals	00000000	00000
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	3	SPDT	On-(On)	7 A @ 125 V AC, 10 A @ 28 V DC	28V DC 125V AC	1.16"	Yes	Screw Terminals	00000000	00000
3 Position
For 1/2" Panel Cutout Dia.
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	3	SPDT	(On)-Off-(On)	7 A @ 125 V AC, 10 A @ 28 V DC	28V DC 125V AC	1.16"	Yes	Screw Terminals	00000000	00000
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	3	SPDT	(On)-Off-On	7 A @ 125 V AC, 10 A @ 28 V DC	28V DC 125V AC	1.16"	Yes	Screw Terminals	00000000	00000

Easy-Grip Pendant Switches

With a slim shape, these switches fit comfortably in your hand. Use them with mobile machinery such as cranes, hoists, and trolleys.

Style C can be wired to prevent both buttons from operating simultaneously.

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

Easy-Grip Pendant Switches

1 Speed with Screw Terminals
Style	No. of Buttons	No. of Circuits Controlled per Actuator	Switch Starting Position	Switch Action	No. of Terminals per Actuator	Switching Current @ Voltage	Max. Voltage	Message (Actuator Color—Industry Designation)	Housing Material		Each
IP67
F	2	1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	2	10 A @ 120 V AC, 7 A @ 24 V DC	28V DC 250V AC	35 Assorted Labels (Black—SPDT)	Yellow Plastic	0000000	0000000

3/4" Panel-Mount Key Switches

With Wire Leads

Prevent accidental activation and limit access—these switches require a key to turn circuits on or off. All fit into a standard panel cutout.

Keyed alike switches all open with the same key.

Keyed differently switches each open with a unique key.

Keyed differently/master keyed switches are keyed differently but can be used with a master key (sold separately).

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

Switches													Replacement Keys
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of Keys Included	Key Removal Position		Each		Each
2 Position with Metal Base
Keyed Alike with Wire Leads
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 1/8"	2	Center	00000000	000000	00000000	00000
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 1/8"	2	Center, Right	0000000	00000	0000000	0000
Keyed Differently with Wire Leads
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 1/8"	2	Center	00000000	00000	00000000	0000
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 1/8"	2	Center, Right	0000000	00000	0000000	0000

Switches													Master Keys
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of Keys Included	Key Removal Position		Each		Each
2 Position with Metal Base
Keyed Differently/Master Keyed with Wire Leads
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 1/8"	2	Center	00000000	000000	00000000	00000
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 1/8"	2	Center, Right	0000000	00000	0000000	0000

High-Security 3/4" Panel-Mount Key Switches

With a round key that is difficult to duplicate, these switches provide a higher degree of security than standard key switches.

Keyed alike switches all open with the same key.

Keyed differently switches each open with a unique key.

Keyed differently/master keyed switches are keyed differently but can be used with a master key (sold separately).

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

Switches
									Wire Leads			Key			Replacement Keys
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of	Lg.	No. of Keys Included	Removal Position		Each		Each
2 Position with Metal Base
Keyed Alike with Wire Leads
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 3/16"	2	10"	2	Center, Right	0000000	000000	0000000	000000
Keyed Differently with Wire Leads
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 3/16"	2	10"	2	Center, Right	0000000	00000	0000000	00000
Keyed Differently/Master Keyed with Wire Leads
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	7 A @ 28 V DC/28 V AC	28V DC 28V AC	7/8"	1 3/16"	2	10"	2	Center, Right	0000000	00000	000000	00

Master Key

0000000

Each

00000

Light Beam Finger-Touch Switches

An infrared light beam senses the lightest finger contact to switch a circuit on or off. The included guard prevents accidental activation. An indicator lights up to confirm that switches are actuated. They’re rated NEMA 4X, 13, and IP66 for protection from corrosion, washdowns, and oil/coolant spraying.

Switches with a 5-pole mini plug can quickly be changed out.

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

								Wire Leads
No. of Circuits Controlled	Switch Starting Position	Switch Action	Industry Designation	Actuator Color	Switching Current @ Voltage	Input Voltage	Dp. Behind Panel	No. of	Ga.	Features		Each
Plastic Actuator with Wire Leads
For 30 mm Panel Cutout Dia.
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	Black	7 A @ 120 V AC	120V AC	3/4"	5	22	Guard Output Indicator Power Indicator	00000000	0000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	Black	7 A @ 120 V AC	20V AC-30V AC/20V DC-30V DC	3/4"	5	22	Guard Output Indicator Power Indicator	00000000	000000
Plastic Actuator with 5-Pole Mini Plug
For 30 mm Panel Cutout Dia.
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	Black	7 A @ 120 V AC	120V AC	1 3/8"	__	__	Guard Output Indicator Power Indicator	00000000	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	Springs Back (Momentary)	SPDT	Black	7 A @ 120 V AC	20V AC-30V AC/20V DC-30V DC	1 3/8"	__	__	Guard Output Indicator Power Indicator	00000000	000000

Replacement Guard	00000000	Each	000000
Mini 5 Pole Female Cable—12 ft.	00000000	Each	00000

Solid State Screw Terminal Relays

1-Circuit Relay

1-Circuit Relay with
Covered Terminals
and LED Indicator

1-Circuit Relay with LED Indicator

Heat Sink

With no moving parts, these solid-state relays are fast switching and require less maintenance, last longer, and are quieter than mechanical switches.

Heat sinks disperse heat to increase the relay’s current rating. Mount them to 35 mm DIN rail (also known as DIN 3 rail) for fast installation. They also mount to flat surfaces. Before mounting one-circuit relays, silicone compound should be applied between the heat sink and relay. Silicone is sold separately for 75A and 90A one-circuit relays. Two-circuit relays don’t require silicone for mounting.

Relays
		Switching Current									Heat Sinks		Silicone Compounds
Number of Terminals	Input Voltage	Without Heat Sink	With Heat Sink	Switching Voltage	Max. Switching Voltage	Ht.	Wd.	Dp.		Each		Each		Each
1 Circuit Controlled with 1 Off (Normally Open)—SPST-NO
Relays with High-Starting-Current Protection
4	85V AC, 120V AC, 240V AC, 280V AC	7A	25A	120V AC	140V AC	2.3"	1.8"	1"	0000000	000000	0000000	0000000	000000	00
4	85V AC, 120V AC, 240V AC, 280V AC	7A	25A	240V AC	280V AC	2.3"	1.8"	1"	0000000	00000	0000000	000000	000000	00
4	3V DC, 6V DC, 12V DC, 24V DC, 30V DC	7A	25A	120V AC	140V AC	2.3"	1.8"	1"	0000000	00000	0000000	000000	000000	00
4	3V DC, 6V DC, 12V DC, 24V DC, 30V DC	7A	25A	240V AC	280V AC	2.3"	1.8"	1"	0000000	00000	0000000	000000	000000	00
Relays with High-Starting-Current Protection and Covered Terminals and LED Indicator
4	120V AC, 240V AC	7A	75A	240V AC	240V AC	2.3"	1.8"	1.1"	0000000	000000	0000000	000000	00000000	000000
4	120V AC, 240V AC	7A	90A	240V AC	240V AC	2.3"	1.8"	1.1"	0000000	000000	0000000	000000	00000000	00000
Relays with High-Starting-Current Protection and LED Indicator
4	3V DC, 6V DC, 12V DC, 24V DC, 30V DC	7A	25A	240V AC	280V AC	2.3"	1.8"	1"	0000000	00000	0000000	000000	000000	00

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Choosing an Electrical Switch

Mil. Spec. Washdown Toggle Switches

Easy-Grip Pendant Switches

3/4" Panel-Mount Key Switches

High-Security 3/4" Panel-Mount Key Switches

Light Beam Finger-Touch Switches

Solid State Screw Terminal Relays