E84967 Circuit Breakers | McMaster-Carr

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48 Products

Square D Load-Center Circuit Breakers

Match these circuit breakers to Square D breaker boxes or panel boards of the same manufacturer series. Because they are thermal-magnetic, these breakers trip two different ways. They either trip when heat is generated by sustained low-level overload current or quickly when the magnetic coil senses a high-current short circuit.

QO Series


QO Series, 1 Pole	QO Series, 2 Poles	QO Series, 3 Poles

UL 489—They meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from 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	Mounting Location	Wire Connection Method	Wd.	Specs. Met	Certification		Each
1 Pole—Toggle-Switch Style



	15	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	3/4"	UL 489	UL Listed	6782K112	000000


	20	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	3/4"	UL 489	UL Listed	6782K113	00000
	30	120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	3/4"	UL 489	UL Listed	6782K12	00000
	40	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	3/4"	UL 489	UL Listed	6782K301	00000


	2 Poles—Toggle Switch



			15	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	1 1/2"	UL 489	UL Listed	6782K212	00000


			20	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	1 1/2"	UL 489	UL Listed	6782K213	00000
			30	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	1 1/2"	UL 489	UL Listed	6782K214	00000
			40	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	1 1/2"	UL 489	UL Listed	6782K215	00000
			50	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	1 1/2"	UL 489	UL Listed	6782K216	00000
			60	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	1 1/2"	UL 489	UL Listed	6782K217	00000
			70	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	1 1/2"	UL 489	UL Listed	6782K22	000000


			3 Poles—Toggle Switch



					15	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	2 1/4"	UL 489	UL Listed	6782K306	000000


					20	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	2 1/4"	UL 489	UL Listed	6782K307	000000
					30	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	2 1/4"	UL 489	UL Listed	6782K308	000000
					40	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Breaker Box	Snap On	2 1/4"	UL 489	UL Listed	6782K309	000000

QO Series with 6 mA Ground Fault Sensitivity


QO Series, 1 Pole	QO Series, 2 Poles

Circuit breakers with ground fault sensitivity will trip if they detect a current leak above 6 mA. This minimizes the risk of electric shock to workers and equipment.

UL 489—They meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from 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, V AC	Freq., Hz	Breakthrough Current @ Voltage	Mounting Location	Wire Connection Method	Wd.	Specs. Met	Certification		Each
1 Pole—Toggle-Switch Style



	20	120	50/60	10,000 amp @ 120V AC	Breaker Box	Snap On	3/4"	UL 489	UL Listed	6782K302	0000000


	30	120	50/60	10,000 amp @ 120V AC	Breaker Box	Snap On	3/4"	UL 489	UL Listed	6782K303	000000


	2 Poles—Toggle Switch



			20	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1.5"	UL 489	UL Listed	6782K304	000000


			30	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1.5"	UL 489	UL Listed	6782K305	000000

QOB Series


QOB Series, 1 Pole	QOB Series, 2 Poles	QOB Series, 3 Poles

UL 489—They meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from 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	Mounting Location	Wire Connection	Wd.	Specs. Met	Certification		Each
1 Pole—Toggle-Switch Style



	15	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	3/4"	UL 489	UL Listed	6782K511	000000


	20	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	3/4"	UL 489	UL Listed	6782K512	00000
	30	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	3/4"	UL 489	UL Listed	6782K513	00000
	40	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	3/4"	UL 489	UL Listed	6782K31	00000


	2 Poles—Toggle Switch



			15	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	1 1/2"	UL 489	UL Listed	6782K611	00000


			20	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	1 1/2"	UL 489	UL Listed	6782K612	00000
			30	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	1 1/2"	UL 489	UL Listed	6782K613	00000
			40	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	1 1/2"	UL 489	UL Listed	6782K311	00000


			3 Poles—Toggle Switch



					15	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	2 1/4"	UL 489	UL Listed	6782K711	000000


					20	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	2 1/4"	UL 489	UL Listed	6782K712	000000
					30	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	2 1/4"	UL 489	UL Listed	6782K713	000000
					40	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	2 1/4"	UL 489	UL Listed	6782K312	000000
					50	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	2 1/4"	UL 489	UL Listed	6782K313	000000
					60	48V DC 120V AC 240V AC	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC 5,000 amp @ 48V DC	Panel Board	Screw-Clamp Terminal	2 1/4"	UL 489	UL Listed	6782K314	000000

Homeline Series


Homeline Series, 1 Pole	Homeline Series, 2 Poles	Homeline Series, 3 Poles

UL 489—They meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from 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, V AC	Freq., Hz	Breakthrough Current @ Voltage	Mounting Location	Wire Connection Method	Wd.	Specs. Met	Certification		Each
1 Pole—Toggle-Switch Style



	15	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1"	UL 489	UL Listed	69225K71	000000


	20	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1"	UL 489	UL Listed	69225K72	00000
	30	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1"	UL 489	UL Listed	69225K73	00000
	40	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1"	UL 489	UL Listed	69225K91	00000
	50	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1"	UL 489	UL Listed	69225K101	00000


	1 Pole with Tandem Circuit—Toggle Switch



			20	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	1"	UL 489	UL Listed	69225K84	00000


			2 Poles—Toggle Switch



					15	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K92	00000


					20	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K75	00000
					30	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K76	00000
					40	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K77	00000
					50	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K102	00000
					60	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K103	00000

Homeline Series with 6 mA Ground Fault Sensitivity


Homeline Series, 1 Pole	Homeline Series, 3 Poles

Circuit breakers with ground fault sensitivity will trip if they detect a current leak above 6 mA. This minimizes the risk of electric shock to workers and equipment.

UL 489—They meet UL 489 requirements for branch circuit protection, so they protect downstream equipment and wiring from 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, V AC	Freq., Hz	Breakthrough Current @ Voltage	Mounting Location	Wire Connection Method	Wd.	Specs. Met	Certification		Each
1 Pole—Toggle-Switch Style



	20	120	50/60	10,000 amp @ 120V AC	Breaker Box	Snap On	1"	UL 489	UL Listed	69225K82	0000000


	2 Poles—Toggle Switch



			20	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K104	000000


			30	120 240	50/60	10,000 amp @ 120V AC 10,000 amp @ 240V AC	Breaker Box	Snap On	2"	UL 489	UL Listed	69225K105	000000