Panel Breakers | McMaster-Carr

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	Current Current

	Voltage Voltage

	Manual Reset Style Manual Reset Style


Toggle	Push Button

Rocker	Push-Pull Button

	Mounting Location Mounting Location	Show

Panel

	Mounting Location Mounting Location	Hide

	Number of Poles Number of Poles

	Wire Connection Type Wire Connection Type


Quick- Disconnect Terminals	Screw Terminals

	Frequency Frequency

50Hz

60Hz

	Mount Type Mount Type

Screw

Snap In

	Maximum Temperature Maximum Temperature

Less than 150° F

150° to 174° F

175° to 249° F

	Reset Type Reset Type

Manual

	Specifications Met Specifications Met

CSA

	System of Measurement System of Measurement

Inch

	For Panel Cutout Diameter For Panel Cutout Diameter

	Circuit Breaker Type Circuit Breaker Type

Thermal

Magnetic

Hydraulic

	Depth Behind Panel Depth Behind Panel

	Minimum Temperature Minimum Temperature

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant with
Exemptions

	Breakthrough Current Breakthrough Current

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	UL File Number UL File Number

E67320

E71572

	(Web) Breakthrough Current @ Voltage (Web) Breakthrough Current @ Voltage

	Number of Mounting Holes Number of Mounting Holes

	For Panel Cutout Height For Panel Cutout Height

57 Products

Space-Saver Panel-Mount Branch Circuit Breakers

Small enough to fit in tight spaces, these circuit breakers mount through panels and are UL 489-rated for branch circuit protection. They 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.

1 Pole—Push Button Style
Current, A	Voltage	Frequency, Hz	Breakthrough Current	For Panel Cutout Dia.	Dp. Behind Panel	Mount Type	Mounting Fasteners Included	Quick-Disconnect Tab Wd.	Temp. Range, °F	Specifications Met		Each
15	120V AC	50/60	5,000 A @ 120 V AC	0.38"	1.43"	Screw On	Yes	0.25"	35° to 140°	UL 489, UL Listed, CSA Certified	0000000	000000
20	120V AC	50/60	5,000 A @ 120 V AC	0.38"	1.43"	Screw On	Yes	0.25"	35° to 140°	UL 489, UL Listed, CSA Certified	0000000	00000

High-Temperature Panel-Mount Circuit Breakers

1 Pole

2 Pole

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 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.

					For Panel Cutout				Mounting Holes
Current, A	Voltage	Frequency, Hz	Breakthrough Current	Temp. Range, °F	Ht.	Wd.	Dia.	Dp. Behind Panel	No. of	Thread Size	Mounting Fasteners Included	Wire Connection Type	Ht.	Wd.		Each
1 Pole—Toggle Style
5	277V AC/80V DC	50/60	5,000 A @ 277 V AC 7,500 A @ 80 V DC	-40° to 185°	__	__	0.63"	2"	2	6-32	No	Quick-Disconnect Terminals	2"	0.75"	000000000	000000
10	277V AC/80V DC	50/60	5,000 A @ 277 V AC 7,500 A @ 80 V DC	-40° to 185°	__	__	0.63"	2"	2	6-32	No	Quick-Disconnect Terminals	2"	0.75"	000000000	00000
15	277V AC/80V DC	50/60	5,000 A @ 277 V AC 7,500 A @ 80 V DC	-40° to 185°	__	__	0.63"	2"	2	6-32	No	Quick-Disconnect Terminals	2"	0.75"	000000000	00000
20	277V AC/80V DC	50/60	5,000 A @ 277 V AC 7,500 A @ 80 V DC	-40° to 185°	__	__	0.63"	2"	2	6-32	No	Quick-Disconnect Terminals	2"	0.75"	000000000	00000
30	277V AC/80V DC	50/60	5,000 A @ 277 V AC 7,500 A @ 80 V DC	-40° to 185°	__	__	0.63"	2"	2	6-32	No	Quick-Disconnect Terminals	2"	0.75"	000000000	00000
40	250V AC/80V DC	50/60	1,500 A @ 250 V AC 5,000 A @ 80 V DC	-40° to 185°	1.45"	0.76"	__	2.48"	2	6-32	No	Screw Terminals	2.5"	0.75"	00000000	00000
50	250V AC/80V DC	50/60	1,500 A @ 250 V AC 5,000 A @ 80 V DC	-40° to 185°	1.45"	0.76"	__	2.48"	2	6-32	No	Screw Terminals	2.5"	0.75"	00000000	00000
2 Pole—Toggle Style
5	277V AC/80V DC	50/60	5,000 A @ 277 V AC 7,500 A @ 80 V DC	-40° to 185°	__	__	0.63"	2"	4	6-32	No	Quick-Disconnect Terminals	2"	1.5"	00000000	00000
10	277V AC/80V DC	50/60	5,000 A @ 277 V AC 7,500 A @ 80 V DC	-40° to 185°	__	__	0.63"	2"	4	6-32	No	Quick-Disconnect Terminals	2"	1.5"	00000000	00000
15	250V AC	50/60	1,500 A @ 250 V AC	-40° to 185°	1.45"	1.52"	__	2.48"	4	6-32	No	Screw Terminals	2.5"	1.5"	00000000	00000
20	250V AC	50/60	1,500 A @ 250 V AC	-40° to 185°	1.45"	1.52"	__	2.48"	4	6-32	No	Screw Terminals	2.5"	1.5"	00000000	00000

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.

Covers for rocker style breakers (sold separately) provide IP54 protection against limited dust and splashed water.

Covers for push-button style breakers (sold separately) provide IP65 protection against water projected from a nozzle.

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

Push Button Style—Screw-On Mount

Push Button Style

				For Panel Cutout			Mounting Holes
Current, A	Voltage	Frequency, Hz	Breakthrough Current	Ht.	Wd.	Dp. Behind Panel	No. of	Dia.	Mounting Fasteners Included	Quick-Disconnect Tab Wd.	Temp. Range, °F	Specifications Met		Each
1 Pole
5	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	000000
10	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
15	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
20	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
2 Pole
5	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
10	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
15	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
20	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.98"	0.99"	1.96"	2	0.15"	No	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000

Rocker Style—Snap-In Mount

Rocker Style

				For Panel Cutout
Current, A	Voltage	Frequency, Hz	Breakthrough Current	Ht.	Wd.	Dp. Behind Panel	Quick-Disconnect Tab Wd.	Temp. Range, °F	Specifications Met		Each
1 Pole
5	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	000000
10	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
15	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
20	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
2 Pole
5	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
10	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
15	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000
20	240V AC/60V DC	50/60	1,000 A @ 240 V AC 1,000 A @ 60 V DC	1.77"	0.85"	1.75"	0.25"	15° to 130°	UL 1077, UL Recognized Component, CSA Certified	0000000	00000

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

Covers

Cover for
Push Button
Style Breaker

Cover for
Rocker
Style Breaker

For Circuit Breaker Style	Environmental Rating	Material	Color		Each
Push Button	IP65	Plastic	Clear	000000	00000
Rocker	IP54	Plastic	Clear	000000	0000

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