Ignition Switches | McMaster-Carr

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15/32"

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Number of Circuits Controlled

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46 Products

Choosing an Electrical Switch

With Screw Terminals

With Tab Terminals

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).

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 Screw Terminals
1	1 Off (Normally Open)	Springs Back (Momentary)	2	SPST-NO	6 A @ 120 V AC	240V AC	7/8"	1 3/4"	2	Center	7188K34	000000	7188K37	00000
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	6 A @ 120 V AC	240V AC	7/8"	1 1/2"	2	Center	7188K32	00000	7188K35	0000
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	6 A @ 120 V AC	240V AC	7/8"	1 1/2"	2	Center, Right	7188K33	00000	7188K36	0000
Keyed Alike with Tab Terminals
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	3	SPDT	4 A @ 125 V AC/24 V DC	28V DC 125V AC	7/8"	1 1/16"	2	Center	7278K12	00000	7278K2	0000
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	3	SPDT	4 A @ 125 V AC/24 V DC	28V DC 125V AC	7/8"	1 1/16"	2	Center, Right	7278K13	00000	7278K3	0000
2	2 Off (Normally Open) or 2 On (Normally Closed)	Stays Switched (Maintained)	6	DPDT	4 A @ 125 V AC/24 V DC	28V DC 125V AC	7/8"	1 1/16"	2	Center	7278K14	00000	7278K4	0000
2	2 Off (Normally Open) or 2 On (Normally Closed)	Stays Switched (Maintained)	6	DPDT	4 A @ 125 V AC/24 V DC	28V DC 125V AC	7/8"	1 1/16"	2	Center, Right	7278K15	00000	7278K5	0000
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	7188K101	00000	7188K104	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	7188K22	00000	7188K62	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	7188K102	00000	7188K105	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	7188K21	00000	7188K61	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	7188K103	000000	7188K106	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	7188K23	00000	7188K14	0000

3 Position with Metal Base
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
Keyed Alike with Tab Terminals
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	3	SPST-NO	4 A @ 125 V AC/24 V DC	28V DC 125V AC	7/8"	1 1/16"	2	Left, Center, Right	7278K19	000000
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	4	SPST-NO	4 A @ 125 V AC/24 V DC	28V DC 125V AC	7/8"	1 1/16"	2	Center	7278K18	00000
2	2 Off (Normally Open) or 2 On (Normally Closed)	Stays Switched (Maintained)	8	DPDT	4 A @ 125 V AC/24 V DC	28V DC 125V AC	7/8"	1 1/16"	2	Center	7278K17	00000

Washdown 3/4" Panel-Mount Key Switches

With Screw Terminals

With Tab Terminals

Rated NEMA 4 or IP66, these switches are protected from washdowns. They require a key to turn circuits on or off, limiting access to sensitive equipment. 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.

Key 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	Environmental Rating		Each		Each
2 Position with Metal Base
Keyed Alike with Screw Terminals
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	10 A @ 300 V AC/24 V DC	24V DC 300V AC	7/8"	1 7/8"	2	Center, Right	NEMA 4, IP66	7182K13	000000	7182K2	00000
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	20 A @ 240 V AC	690V AC	7/8"	2 5/8"	2	Center, Right	IP66	7182K101	00000	7182K2	0000
Keyed Alike with Tab Terminals
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	3	SPDT	4 A @ 125 V AC/28 V DC	28V DC 125V AC	7/8"	1 1/4"	2	Center, Right	NEMA 4, IP66	7182K11	00000	7182K2	0000
Keyed Differently with Screw Terminals
2	1 Off (Normally Open) and 1 On (Normally Closed)	Stays Switched (Maintained)	4	DPST-1NO/1NC	10 A @ 300 V AC/24 V DC	24V DC 300V AC	7/8"	1 7/8"	2	Center, Right	NEMA 4, IP66	7182K14	00000	______	00
Keyed Differently with Tab Terminals
1	1 Off (Normally Open) or 1 On (Normally Closed)	Stays Switched (Maintained)	3	SPDT	4 A @ 125 V AC/28 V DC	28V DC 125V AC	7/8"	1 1/4"	2	Center, Right	NEMA 4, IP66	7182K12	00000	______	00

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).

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	7188K26	000000	7188K31	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	7188K25	00000	7188K51	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	7188K27	00000	______	00

Master Key

7188K18

Each

000000

Miniature 15/32" Panel-Mount Key Switches

With Quick-Disconnect Terminals

With Wire Leads

Maximize space in a panel with these miniature switches. They require a key to turn circuits on or off, limiting access to sensitive equipment. All are keyed alike, so they open with the same key.

										Wire Leads
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	Quick-Disconnect Tab Width	No. of	Lg.	No. of Keys Included	Key Removal Position		Each
2 Position with Metal Base
Keyed Alike with Quick-Disconnect Terminals
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	4 A @ 125 V AC/24 V DC	28V DC 250V AC	9/16"	1 5/16"	0.11"	__	__	2	Center	65635K13	000000
Keyed Alike with Wire Leads
1	1 Off (Normally Open)	Stays Switched (Maintained)	2	SPST-NO	4 A @ 125 V AC/24 V DC	28V DC 250V AC	9/16"	1 5/16"	__	2	6"	2	Center	65635K14	00000

High-Amp Outlet-Box-Mount Key Switches

Able to withstand high currents, these switches can be used with motors and pumps. They require a key to turn circuits on or off, limiting access to sensitive equipment. All are keyed alike, so they open with the same key.

											Key
No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Industry Designation	Switching Current @ Voltage	Max. Voltage	Horsepower @ Switching Voltage	Dia.	No. of Keys Included	Keying	Removal Position		Each
2 Position with Metal Base
Keyed Alike with Screw Terminals
2	2 Off (Normally Open)	Stays Switched (Maintained)	4	DPST-NO	20 A @ 120 V AC	277V AC	1 hp @ 120 V AC	7/8"	2	Keyed Alike	Center	5049T5	0000000

Replacement Keys (Pkg. of 2)	5049T6	Pkg.	000000
Wall Plate	8033K58	Each	00000