Ignition Switches | McMaster-Carr

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15/32"

3/4"

0.88"

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Number of Circuits Controlled

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Electrical Connection

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46 Products

About Electrical Switches

Choose a switch with the right trigger type, number of inputs, and control functions to power your equipment.

3/4" Panel-Mount Key Switches


Screw-Terminal Wire Connection	Tab Wire Connection	Wire Lead Connection

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—Keyed alike switches all open with the same key.

Keyed Differently—Keyed differently switches each open with a unique key.

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

	Key Switches															Replacement Keys		Master Keys
										Wire Leads
	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Switch Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of	Lg.	No. of Keys Included	Key Removal Position		Each		Each		Each
2 Positions with Metal Actuator Base







				Keyed Alike with Screw-Terminal Wire Connection

				1	1 Off	Momentary	2	SPST-NO	6 amp @ 120V AC	240V AC	7/8"	1 3/4"	—	—	2	Center	7188K34	000000	7188K37	00000	———	0


				1	1 Off	Maintained	2	SPST-NO	6 amp @ 120V AC	240V AC	7/8"	1 1/2"	—	—	2	Center	7188K32	00000	7188K35	0000	———	0
				1	1 Off	Maintained	2	SPST-NO	6 amp @ 120V AC	240V AC	7/8"	1 1/2"	—	—	2	Center, Right	7188K33	00000	7188K36	0000	———	0




						Keyed Alike with Tab Wire Connection

						1	1 Off or 1 On	Maintained	3	SPDT	4 amp @ 125V AC/24V DC	125V AC 28V DC	7/8"	1 1/16"	—	—	2	Center	7278K12	00000	7278K2	0000	———	0


						1	1 Off or 1 On	Maintained	3	SPDT	4 amp @ 125V AC/24V DC	125V AC 28V DC	7/8"	1 1/16"	—	—	2	Center, Right	7278K13	00000	7278K3	0000	———	0
						2	2 Off or 2 On	Maintained	6	DPDT	4 amp @ 125V AC/24V DC	125V AC 28V DC	7/8"	1 1/16"	—	—	2	Center	7278K14	00000	7278K4	0000	———	0
						2	2 Off or 2 On	Maintained	6	DPDT	4 amp @ 125V AC/24V DC	125V AC 28V DC	7/8"	1 1/16"	—	—	2	Center, Right	7278K15	00000	7278K5	0000	———	0




								Keyed Alike with Wire Lead Connection

								1	1 Off	Momentary	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 1/8"	2	10"	2	Center	7188K101	00000	7188K104	0000	———	0


								1	1 Off	Maintained	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 1/8"	2	10"	2	Center, Right	7188K22	00000	7188K62	0000	———	0




										Keyed Differently with Wire Lead Connection

										1	1 Off	Momentary	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 1/8"	2	10"	2	Center	7188K102	00000	7188K105	0000	———	0


										1	1 Off	Maintained	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 1/8"	2	10"	2	Center, Right	7188K21	00000	7188K61	0000	———	0




												Keyed Differently/Master Keyed with Wire Lead Connection

												1	1 Off	Momentary	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 1/8"	2	10"	2	Center	7188K103	00000	———	0	7188K106	00000


												1	1 Off	Maintained	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 1/8"	2	10"	2	Center, Right	7188K23	00000	———	0	7188K14	0000


												3 Positions with Metal Actuator Base







														Keyed Alike with Tab Wire Connection

														1	1 Off or 1 On	Maintained	3	SPST-NO	4 amp @ 125V AC/24V DC	125V AC 28V DC	7/8"	1 1/16"	—	—	2	Center, Left, Right	7278K19	00000	———	0	———	0


		1	1 Off or 1 On											Maintained	4	SPST-NO	4 amp @ 125V AC/24V DC	125V AC 28V DC	7/8"	1 1/16"	—	—	2	Center	7278K18	00000	———	0	———	0
		2	2 Off or 2 On											Maintained	8	DPDT	4 amp @ 125V AC/24V DC	125V AC 28V DC	7/8"	1 1/16"	—	—	2	Center	7278K17	00000	———	0	———	0

Washdown 3/4" Panel-Mount Key Switches


Screw-Terminal Wire Connection	Tab Wire Connection

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—Keyed alike switches all open with the same key.

Keyed Differently—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	Switch Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of Keys Included	Key Removal Position	Enclosure Rating		Each		Each
2 Positions with Metal Actuator Base







				Keyed Alike with Screw-Terminal Wire Connection

				2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	10 amp @ 300V AC/24V DC	300V AC 24V DC	7/8"	1 7/8"	2	Center, Right	NEMA 4, IP66	7182K13	000000	7182K2	00000


				2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	20 amp @ 240V AC	690V AC	7/8"	2 5/8"	2	Center, Right	IP66	7182K101	00000	7182K2	0000




						Keyed Alike with Tab Wire Connection

						1	1 Off or 1 On	Maintained	3	SPDT	4 amp @ 125V AC/28V DC	125V AC 28V DC	7/8"	1 1/4"	2	Center, Right	NEMA 4, IP66	7182K11	00000	7182K2	0000




								Keyed Differently with Screw-Terminal Wire Connection

								2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	10 amp @ 300V AC/24V DC	300V AC 24V DC	7/8"	1 7/8"	2	Center, Right	NEMA 4, IP66	7182K14	00000	———	0




										Keyed Differently with Tab Wire Connection

										1	1 Off or 1 On	Maintained	3	SPDT	4 amp @ 125V AC/28V DC	125V AC 28V DC	7/8"	1 1/4"	2	Center, Right	NEMA 4, IP66	7182K12	00000	———	0

Miniature 15/32" Panel-Mount Key Switches


Quick-Disconnect-Terminal Wire Connection	Wire Lead Connection

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	Switch Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	Quick-Disconnect Tab Wd.	No. of	Lg.	No. of Keys Included	Key Removal Position		Each
2 Positions with Metal Actuator Base







				Keyed Alike with Quick-Disconnect-Terminal Wire Connection

				1	1 Off	Maintained	2	SPST-NO	4 amp @ 125V AC/24V DC	250V AC 28V DC	9/16"	1 5/16"	0.11"	—	—	2	Center	65635K13	000000




						Keyed Alike with Wire Lead Connection

						1	1 Off	Maintained	2	SPST-NO	4 amp @ 125V AC/24V DC	250V AC 28V DC	9/16"	1 5/16"	—	2	6"	2	Center	65635K14	00000

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—Keyed alike switches all open with the same key.

Keyed Differently—Keyed differently switches each open with a unique key.

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

	Key Switches															Replacement Keys
										Wire Leads
	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Switch Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of	Lg.	No. of Keys Included	Key Removal Position		Each		Each
2 Positions with Metal Actuator Base







				Keyed Alike with Wire Lead Connection

				1	1 Off	Maintained	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 3/16"	2	10"	2	Center, Right	7188K26	000000	7188K31	000000




						Keyed Differently with Wire Lead Connection

						1	1 Off	Maintained	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 3/16"	2	10"	2	Center, Right	7188K25	00000	7188K51	00000




								Keyed Differently/Master Keyed with Wire Lead Connection

								1	1 Off	Maintained	2	SPST-NO	7 amp @ 28V AC/28V DC	28V AC 28V DC	7/8"	1 3/16"	2	10"	2	Center, Right	7188K27	00000	———	0

Keys

		Each
Master Key	7188K18	000000

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.

	No. of Terminals	Switch Designation	Switching Current @ Voltage	Max. Voltage, V AC	hp @ Switching Voltage	Dia.	Dp. Behind Panel	No. of Keys Included	Key Removal Position		Each
2 Positions with Metal Actuator Base







	Keyed Alike with Screw-Terminal Wire Connection

	2	2 Off	Maintained	4	DPST-NO	20 amp @ 120V AC	277	1 hp @ 120V AC	7/8"	1 11/16"	2	Center	5049T5	0000000

Accessories and Replacements for Key Switches


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