E67320 Circuit Breakers | McMaster-Carr

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26 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. They are rated UL1077 for protection against overloads and short circuits. 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.

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

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

Toggle Style—Screw-On Mount

Toggle Style

1 Pole
Current, A	Voltage	Frequency, Hz	Breakthrough Current	For Panel Cutout Dia.	Dp. Behind Panel	Mounting Fasteners Included	Quick-Disconnect Tab Wd.	Temp. Range, °F	Specifications Met		Each
1/20	250V AC/75V DC	50/60	200 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	000000
2/10	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
4/10	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
1/2	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
6/10	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
8/10	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
1	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
1 1/2	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
2	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
2 1/2	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
3	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
4	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
5	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
6	250V AC/75V DC	50/60	1,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
8	250V AC/75V DC	50/60	2,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000
10	250V AC/75V DC	50/60	2,000 A @ 250 V AC 800 A @ 75 V DC	1/4"	2.42"	Yes	0.25"	-20° to 140°	UL 1077, UL Recognized Component	0000000	00000

Harsh-Environment Circuit Breakers

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.

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

Push-pull button and lever style breakers can be used as an on/off switch.

Place UL1077 rated breakers downstream from a branch circuit breaker to protect a single piece of equipment. They are also known as supplemental protectors.

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

Push-Pull Button Style

1 Pole
Current, A	Voltage	Breakthrough Current	For Panel Cutout Dia.	Dp. Behind Panel	Mount Type	Mounting Fasteners Included	Wire Connection Type	Temp. Range, °F	Specifications Met		Each
30	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	000000
35	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
40	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
45	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
50	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
55	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
60	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
70	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
80	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000
90	28V DC	6,000 A @ 28 V DC	0.49"	2.48"	Screw On	Yes	Screw Terminals	-65° to 165°	UL 1077, UL Recognized Component	0000000	00000