Panel Breakers | McMaster-Carr

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EAR99

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UL 489

UL 1077

Panel Cutout Diameter

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Height

57 Products

Panel-Mount Equipment Circuit Breakers

Mount these breakers, also known as supplemental protectors, through panels downstream from a branch circuit breaker to protect a single piece of equipment. These breakers can also be used as on/off switches. All are thermal, so they use the heat generated in overcurrent situations to trip the breaker.

Push-Button Style—Screw-On Mount

Image of Product. Front orientation. Circuit Breakers. Panel-Mount Equipment Circuit Breakers, Push Button Manual Reset.

UL 1077—They are rated UL 1077 for protection against overloads and short circuits.

Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.

					For Panel Cutout			Mounting Holes
	Current, A	Voltage	Freq., Hz	Breakthrough Current @ Voltage	Ht.	Wd.	Dp. Behind Panel	No. of	Dia.	Mounting Fasteners Included	Quick-Disconnect Tab Wd.	Temp. Range, ° F	Specs. Met	Certification		Each
1 Pole



		5	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T41	000000


		10	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T42	00000
		15	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T43	00000
		20	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T44	00000


		2 Poles



				5	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T51	00000


				10	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T52	00000
				15	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T53	00000
				20	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T54	00000

Circuit Breaker Covers

For

Push

Button

Circuit

Breakers

IP65 Enclosure Rating—Covers for push-button style breakers provide IP65 protection against water projected from a nozzle.

For Circuit Breaker Style	Enclosure Rating	Material	Color		Each
Push Button	IP65	Plastic	Clear	3931T7	00000

Rocker-Switch Style—Snap-In Mount

Image of Product. Front orientation. Circuit Breakers. Panel-Mount Equipment Circuit Breakers, Rocker Switch Manual Reset.

UL 1077—They are rated UL 1077 for protection against overloads and short circuits.

Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.

					For Panel Cutout
	Current, A	Voltage	Freq., Hz	Breakthrough Current @ Voltage	Ht.	Wd.	Dp. Behind Panel	Quick-Disconnect Tab Wd.	Temp. Range, ° F	Specs. Met	Certification		Each
1 Pole



		5	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T11	000000


		10	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T12	00000
		15	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T13	00000
		20	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T14	00000


		2 Poles



				5	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T21	00000


				10	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T22	00000
				15	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T23	00000
				20	60V DC 240V AC	50/60	1,000 amp @ 240V AC 1,000 amp @ 60V DC	1.77"	0.85"	1 3/4"	0.25"	15 to 130	UL 1077	UL Recognized Component, CSA Certified	3931T24	00000

Circuit Breaker Covers

For

Rocker

Switch

Circuit

Breakers

IP54 Enclosure Rating—Covers for rocker style breakers provide IP54 protection against limited dust and splashed water.

For Circuit Breaker Style	Enclosure Rating	Material	Color		Each
Rocker Switch	IP54	Plastic	Clear	3931T6	00000

Toggle-Switch Style—Screw-On Mount

Image of Product. Front orientation. Circuit Breakers. Panel-Mount Equipment Circuit Breakers, Toggle Switch Manual Reset.

UL 1077—They are rated UL 1077 for protection against overloads and short circuits.

Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.

	Voltage	Freq., Hz	Breakthrough Current @ Voltage	For Panel Cutout Dia.	Dp. Behind Panel	Mounting Fasteners Included	Quick-Disconnect Tab Wd.	Temp. Range, ° F	Specs. Met	Certification		Each
1 Pole



	1/20	75V DC 250V AC	50/60	200 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T11	000000


	2/10	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T12	00000
	4/10	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T13	00000
	1/2	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T14	00000
	6/10	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T15	00000
	8/10	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T16	00000
	1	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T17	00000
	1 1/2	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T18	00000
	2	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T19	00000
	2 1/2	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T21	00000
	3	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T22	00000


	4	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T23	00000
	5	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T24	00000
	6	75V DC 250V AC	50/60	1,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T25	00000
	8	75V DC 250V AC	50/60	2,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T26	00000
	10	75V DC 250V AC	50/60	2,000 amp @ 250V AC 800 amp @ 75V DC	1/4"	2.42"	Yes	0.25"	-20 to 140	UL 1077	UL Recognized Component	7588T27	00000

High-Temperature Panel-Mount Circuit Breakers


1 Pole—Toggle-Switch Style	2 Poles—Toggle-Switch Style

Unlike breakers that trip thermally, these breakers have a hydraulic-magnetic trip mechanism, so they aren’t affected by changes in temperature. Instead, these circuit breakers trip when they hydraulically sense consistent low-level overload current, or they trip quickly when the magnetic coil senses a high-current short circuit. Use the threaded holes on the face to install them through panels, enclosure covers, or walls to keep them close to the equipment they protect.

Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.

						For Panel Cutout				Mounting Holes
	Current, A	Voltage	Freq., Hz	Breakthrough Current @ Voltage	Temp. Range, ° F	Ht.	Wd.	Dia.	Dp. Behind Panel	No. of	Thread Size	Mounting Fasteners Included	Wire Connection	Ht.	Wd.		Each
1 Pole—Toggle-Switch Style



		5	80V DC 277V AC	50/60	5,000 amp @ 277V AC 7,500 amp @ 80V DC	-40 to 185	—	—	0.63"	2"	2	6-32	No	Quick-Disconnect Terminal	2"	0.75"	72015K111	000000


		10	80V DC 277V AC	50/60	5,000 amp @ 277V AC 7,500 amp @ 80V DC	-40 to 185	—	—	0.63"	2"	2	6-32	No	Quick-Disconnect Terminal	2"	0.75"	72015K112	00000
		15	80V DC 277V AC	50/60	5,000 amp @ 277V AC 7,500 amp @ 80V DC	-40 to 185	—	—	0.63"	2"	2	6-32	No	Quick-Disconnect Terminal	2"	0.75"	72015K113	00000
		20	80V DC 277V AC	50/60	5,000 amp @ 277V AC 7,500 amp @ 80V DC	-40 to 185	—	—	0.63"	2"	2	6-32	No	Quick-Disconnect Terminal	2"	0.75"	72015K114	00000
		30	80V DC 277V AC	50/60	5,000 amp @ 277V AC 7,500 amp @ 80V DC	-40 to 185	—	—	0.63"	2"	2	6-32	No	Quick-Disconnect Terminal	2"	0.75"	72015K115	00000
		40	80V DC 250V AC	50/60	1,500 amp @ 250V AC 5,000 amp @ 80V DC	-40 to 185	1.45"	0.76"	—	2.573"	2	6-32	No	Screw Terminal	2.5"	0.75"	72015K36	00000
		50	80V DC 250V AC	50/60	1,500 amp @ 250V AC 5,000 amp @ 80V DC	-40 to 185	1.45"	0.76"	—	2.573"	2	6-32	No	Screw Terminal	2.5"	0.75"	72015K35	00000


		2 Poles—Toggle-Switch Style



				5	80V DC 277V AC	50/60	5,000 amp @ 277V AC 7,500 amp @ 80V DC	-40 to 185	—	—	0.63"	2"	4	6-32	No	Quick-Disconnect Terminal	2"	1.5"	72015K51	00000


				10	80V DC 277V AC	50/60	5,000 amp @ 277V AC 7,500 amp @ 80V DC	-40 to 185	—	—	0.63"	2"	4	6-32	No	Quick-Disconnect Terminal	2"	1.5"	72015K52	00000
				15	250V AC	50/60	1,500 amp @ 250V AC	-40 to 185	1.45"	1.52"	—	2.573"	4	6-32	No	Screw Terminal	2.5"	1.5"	72015K41	000000
				20	250V AC	50/60	1,500 amp @ 250V AC	-40 to 185	1.45"	1.52"	—	2.573"	4	6-32	No	Screw Terminal	2.5"	1.5"	72015K42	000000

Harsh-Environment Circuit Breakers

Pole—Push-Pull-Button

Style

Built to resist vibration and corrosion in harsh environments, these circuit breakers protect against overload and short circuits in low-voltage automotive and other electronic applications. All are thermal, so they use the heat generated in overcurrent situations to trip the breaker.

Push-Pull Button Manual Reset—Push-pull button and lever style breakers can be used as an on/off switch.

UL 1077—Place UL 1077-rated breakers downstream from a branch circuit breaker to protect a single piece of equipment. They are also known as supplemental protectors.

Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.

												Screw On
	Current, A	Voltage, V DC	Breakthrough Current @ Voltage	For Panel Cutout Dia.	Dp. Behind Panel	Mounting Location	Mounting Fasteners Included	Wire Connection	Temp. Range, ° F	Specs. Met	Certification		Each
1 Pole—Push-Pull-Button Style







				Thermal

				30	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T11	000000


				35	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T12	00000
				40	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T13	00000
				45	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T14	00000
				50	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T15	00000
				55	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T16	00000
				60	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T17	00000
				70	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T18	00000
				80	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T19	00000
				90	28	6,000 amp @ 28V DC	0.49"	2.48"	Panel	Yes	Screw Terminal	-65 to 165	UL 1077	UL Recognized Component	6608T21	00000

Space-Saving Panel-Mount Branch Circuit Breakers

Small enough to fit in tight spaces, these circuit breakers mount through panels. They are thermal, so they use the heat generated in overcurrent situations to trip the breaker.

UL 489—These circuit breakers are UL 489-rated for branch circuit protection.

Breakthrough Current @ Voltage—Breakthrough current is the maximum current that the circuit breaker can safely stop in the event of a short circuit.

														Screw On
	Current, A	Voltage, V AC	Freq., Hz	Breakthrough Current @ Voltage	For Panel Cutout Dia.	Dp. Behind Panel	Mounting Location	Mounting Fasteners Included	Wire Connection	Quick-Disconnect Tab Wd.	Temp. Range, ° F	Specs. Met	Certification		Each
1 Pole—Push-Button Style







				Thermal

				15	120	50/60	5,000 amp @ 120V AC	0.38"	1.43"	Panel	Yes	Quick-Disconnect Terminal	0.25"	35 to 140	UL 489	UL Listed, CSA Certified	3851K11	000000


				20	120	50/60	5,000 amp @ 120V AC	0.38"	1.43"	Panel	Yes	Quick-Disconnect Terminal	0.25"	35 to 140	UL 489	UL Listed, CSA Certified	3851K12	00000