NEMA 3 Switches | McMaster-Carr

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NEC Class I Divisions 1, 2 Groups C, D

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NEC Class II Divisions 1, 2 Groups E, F, G

NEC Class III Divisions 1, 2

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50 Products

About Electrical Switches

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

Hazardous Location Enclosed Lever Switches

Use these switches where ignitable gas, dust, and fibers may be present. They're UL and C-UL listed for hazardous locations.

										Mounting
	Actuator Color	Message (Switch Position)	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Switch Designation	Switching Current @ Voltage	Max. Voltage, V AC	Fasteners Included	No. of Holes	Hole Dia.	Enclosure Rating		Each
3 Positions







				Screw-Terminal Wire Connection

				Gray	Hand (Left), Off (Center), Auto (Right)	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	10 amp @ 120V AC	600	No	2	5/16"	NEMA 3	6883K63	0000000

Hazardous Location Enclosed Push-Button Switches


1 Flush Push Button	1 Mushroom Push Button	1 Flush Push Button and 1 Projecting Push Button

Start

Stop

Use these switches where ignitable gas and dust may be present. They're rated for use in hazardous locations.

										Mounting
	Message (Actuator Color)	No. of Circuits Controlled per Button	Switch Starting Position	Switch Action	No. of Terminals per Button	Switch Designation	Switching Current @ Voltage	Max. Voltage, V AC	Conduit Trade Size	Fasteners Included	No. of Holes	Hole Dia.	Enclosure Rating		Each
Aluminum Housing with Screw-Terminal Wire Connection







				1 Flush Push Button

				Start (Black)	1	1 Off and 1 On	Momentary	4	DPST-1NO/1NC	10 amp @ 120V AC	600	3/4	No	2	5/16"	NEMA 3, NEMA 7, NEMA 9	6883K61	0000000




						1 Mushroom Push Button

						Stop (Red)	1	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	10 amp @ 120V AC	600	3/4	No	2	3/16"	NEMA 3	6883K62	000000




								1 Flush Push Button and 1 Projecting Push Button

								Start (Green), Stop (Red),	2	1 Off and 1 On	Momentary	2	DPST-1NO/1NC	10 amp @ 120V AC	600	3/4	No	2	9/32"	NEMA 3, NEMA 7, NEMA 9	6883K55	000000

Vibration-Resistant 22 mm Panel-Mount Lever Switches

Prevent accidental actuation from bumps—these switches require you to grip and twist the lever to turn the switch. The contact block and actuator are all one piece, so they won’t separate in high-vibration applications. Install them in a standard panel cutout.

	No. of Circuits Controlled	Switch Starting Position	Switch Action	No. of Terminals	Switch Designation	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	Enclosure Rating	Certification	Specs. Met		Each
2 Positions with Screw Terminals



	1 1/8"	1	1 Off	Maintained	2	SPST-NO	0.6 amp @ 120V AC, 0.22 amp @ 125V DC	240V AC 250V DC	1 1/8"	1 11/16"	NEMA 3, NEMA 12, IP65	UL Listed, CSA Certified, CCC Marked, CE Marked	UL 508	6894N11	000000


	1 1/8"	2	1 Off and 1 On	Maintained	4	DPST-1NO/1NC	0.6 amp @ 120V AC, 0.22 amp @ 125V DC	240V AC 250V DC	1 1/8"	1 11/16"	NEMA 3, NEMA 12, IP65	UL Listed, CSA Certified, CCC Marked, CE Marked	UL 508	6894N12	00000


	3 Positions with Screw Terminals



			1 1/8"	2	2 Off	Maintained	4	DPST-NO	0.6 amp @ 120V AC, 0.22 amp @ 125V DC	240V AC 250V DC	1 1/8"	1 11/16"	NEMA 3, NEMA 12, IP65	UL Listed, CSA Certified, CCC Marked, CE Marked	UL 508	6894N13	00000

Enclosed Disconnect Switches


Power Pole	Neutral Pole

Cut power and keep it isolated to prevent equipment from starting up during inspection and maintenance. These switches are housed in a protective enclosure that resists denting, chipping, and cracking. Mount them to the wall when you run out of space in an electrical panel.

Use additional switch power poles to control more than three circuits. Add neutral poles to open and close the neutral leg of a three phase system.

Maintained Switch About Maintained Switch


Three-Circuit Switch	Three-Circuit Switch with Lockout

Lockout—Switches with lockout secure in the off position with a padlock with a maximum shackle diameter of _5/16” (not included).

	Switching
	Current, amp	Voltage, V AC	Switch Designation	Electrical Phase (hp)	Ht.	Wd.	For Max. Padlock Shackle Dia.	Wire Connection	Enclosure Rating	Certification		Each
Gray Plastic Housing with Red Actuator







				3 Circuits Controlled with Lockout

				50	600	3PST	Single (1 1/2 hp @ 120V AC) Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K313	0000000


				63	600	3PST	Single (3 hp @ 120V AC) Single (5 hp @ 240V AC) Three (10 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K314	000000
				80	600	3PST	Single (3 hp @ 120V AC) Single (10 hp @ 240V AC) Three (20 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K315	000000
				100	600	3PST	Single (5 hp @ 120V AC) Single (10 hp @ 240V AC) Three (25 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K316	000000




						3 Circuits Controlled

						50	600	3PST	Single (1 1/2 hp @ 120V AC) Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K333	000000


						63	600	3PST	Single (3 hp @ 120V AC) Single (5 hp @ 240V AC) Three (10 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K334	000000
						80	600	3PST	Single (3 hp @ 120V AC) Single (10 hp @ 240V AC) Three (20 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K335	000000
						100	600	3PST	Single (5 hp @ 120V AC) Single (10 hp @ 240V AC) Three (25 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K336	000000


						Gray Plastic Housing with Gray Actuator







										3 Circuits Controlled with Lockout

										50	600	3PST	Single (1 1/2 hp @ 120V AC) Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K323	000000


										63	600	3PST	Single (3 hp @ 120V AC) Single (5 hp @ 240V AC) Three (10 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K324	000000
										80	600	3PST	Single (3 hp @ 120V AC) Single (10 hp @ 240V AC) Three (20 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K325	000000
										100	600	3PST	Single (5 hp @ 120V AC) Single (10 hp @ 240V AC) Three (25 hp @ 240V AC)	8 11/16"	5 7/8"	5/16"	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K326	000000




												3 Circuits Controlled

												50	600	3PST	Single (1 1/2 hp @ 120V AC) Single (3 hp @ 240V AC) Three (7 1/2 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K343	000000


												63	600	3PST	Single (3 hp @ 120V AC) Single (5 hp @ 240V AC) Three (10 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K344	000000
												80	600	3PST	Single (3 hp @ 120V AC) Single (10 hp @ 240V AC) Three (20 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K345	000000
												100	600	3PST	Single (5 hp @ 120V AC) Single (10 hp @ 240V AC) Three (25 hp @ 240V AC)	8 11/16"	5 7/8"	—	Screw Terminal	IP40 NEMA 3	UL Listed, C-UL Listed, CE Marked	6759K346	000000

Accessories and Replacements for Switches

				Yellow Plastic Housing with Red Actuator
25, 32, 50, 63	2 9/16"	2 9/16"	1 5/16"	7277K12	000000
80, 100	3 3/8"	3 3/8"	1 5/16"	7277K15	00000

Auxiliary Contact Blocks

Image of Product. Front orientation. Switch Contact Blocks. Enclosed Disconnect Switches.

Add auxiliary contact blocks to send a signal or connect to another device, such as an alarm or indicating light.

	Switching
No. of Circuits Controlled	Current, amp	Voltage, V AC	Switch Starting Position	Switch Designation		Each
1	10	600	1 Off or 1 On	SPDT	7277K11	000000

Switching Current, amp	Certification		Each
50	UL Listed, CE Marked	6759K413	000000
63	UL Listed, CE Marked	6759K414	00000
80	UL Listed, CE Marked	6759K415	00000
100	UL Listed, CE Marked	6759K416	00000

Switching Current, amp	Certification		Each
50	UL Listed, CE Marked	6759K423	000000
63	UL Listed, CE Marked	6759K424	00000
80	UL Listed, CE Marked	6759K425	00000
100	UL Listed, CE Marked	6759K426	00000

For Current, amp	Certification		Each
50, 63	UL Listed, CE Marked	6759K432	000000
80, 100	UL Listed, CE Marked	6759K433	00000

		Each
"Main Switch" Label with Adhesive Back—13/16" Ht. × 3 3/16" Wd.	6759K65	000000

Vibration-Resistant 22 mm Panel-Mount Key Switches

To prevent accidental actuation and limit access to sensitive equipment, these switches require a key to turn circuits on or off. The contact block and actuator are all one piece, so they won’t separate in high-vibration applications. Install them in a standard panel cutout. They’re keyed alike, so they will all open with the same key.

	No. of Terminals	Switch Designation	Actuator Color	Switching Current @ Voltage	Max. Voltage	Dia.	Dp. Behind Panel	No. of Keys Included	Key Removal Position	Enclosure Rating		Each
2 Positions with Plastic Actuator Base







	Keyed Alike with Screw-Terminal Wire Connection

	1	1 Off	Maintained	2	SPST-NO	Black	0.6 amp @ 120V AC, 0.22 amp @ 125V DC	240V AC 250V DC	1 1/8"	1 11/16"	2	Left	NEMA 3, NEMA 12, IP65	6961N11	000000


	3 Positions with Plastic Actuator Base







					Keyed Alike with Screw-Terminal Wire Connection

					2	2 Off	Maintained	4	DPST-NO	Black	0.6 amp @ 120V AC, 0.22 amp @ 125V DC	240V AC 250V DC	1 1/8"	1 11/16"	2	Center	NEMA 3, NEMA 12, IP65	6961N12	00000

Hazardous Location Differential Pressure Switches for Air

Image of Product. Front orientation. Differential Pressure Switches.

With an explosion-proof enclosure that meets NEMA 7 and 9 standards for hazardous locations, these switches were tested and verified by UL for use where explosive gas or dust may be present. Often used with ovens, dryers, and HVAC systems, they can indicate a filter is clogged or help maintain a certain air pressure. These switches turn equipment on and off, activate automated controls, or signal alarms when the differential pressure reaches your setpoint. They are single pole, double throw (SPDT) and can be installed to turn one circuit from off to on or from on to off.

In addition to being UL listed, these switches are CE marked and FM approved, so they also meet European safety standards. They also are IP and NEMA rated for use outdoors and protect against dust and splashing water.

When measuring pressure in ductwork, pair them with a static pressure probe.

	Accuracy	Max. Switching Current @ Voltage	Process Temp. Range, ° F	Connection Material	For Use With	Enclosure Rating	Hazardous Location Rating		Each
Screw-Terminal Wire Connection







	1/8 NPT Female Pipe Connection

	0.07 in. H₂O to 0.15 in. H₂O	0.13 in. H₂O	45 in. H₂O	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	-40 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N11	0000000


	0.15 in. H₂O to 0.5 in. H₂O	0.05 in. H₂O	45 in. H₂O	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	-40 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N12	000000
	0.4 in. H₂O to 1.6 in. H₂O	0.18 in. H₂O	45 in. H₂O	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	-40 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N13	000000
	1.4 in. H₂O to 5.5 in. H₂O	0.35 in. H₂O	45 in. H₂O	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	-40 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N14	000000
	3 in. H₂O to 11 in. H₂O	0.45 in. H₂O	45 in. H₂O	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	-40 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N15	000000
	4 in. H₂O to 20 in. H₂O	0.5 in. H₂O	45 in. H₂O	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	-40 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N16	000000
	0.5 psi to 2 psi	0.3 psi	35 psi	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	-40 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N17	000000
	1.5 psi to 8 psi	1 psi	35 psi	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	0 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N18	000000
	3 psi to 15 psi	0.9 psi	35 psi	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	0 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N19	000000
	4 psi to 25 psi	0.7 psi	35 psi	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	0 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N21	000000
	15 psi to 50 psi	1.25 psi	70 psi	±2%	15 amp @ 125V AC 15 amp @ 250V AC 15 amp @ 480V AC	0 to 140	Aluminum	Air	IP54, NEMA 3, NEMA 7, NEMA 9	NEC Class I Divisions 1, 2 Groups C, D; NEC Class II Divisions 1, 2 Groups E, F, G	5114N22	000000

				Yellow Plastic Housing with Red Actuator
For Switching Current, amp	Ht.	Wd.	Dp.		Each
25, 32, 50, 63	2 9/16"	2 9/16"	1 5/16"	7277K12	000000
80, 100	3 3/8"	3 3/8"	1 5/16"	7277K15	00000