Branch Circuit Breakers (Bolt-on and Plug-on)

Please reference QO QOB Circuit Breaker Catalog 0730CT9801.

QOB Branch Circuit Breakers

QO Branch Circuit Breakers

Branch Circuit Breakers (Bolt-on or Plug-on)

Circuit Breaker Catalog Prefix	Max. Vac Rating	Number of Poles	Ampere Rating	Interrupting Rating—RMS Symmetrical Amperes*
				Vac
				120	120/240	240
QO, QOB	120/240	1	10–70	—	10k	—
	120/240	2	10–125	—	10k	—
	120/240	2	150–200*	—	10k	—
	240	3	10–100	—	—	10k
QO-H, QOB-H	240	2	15–100	—	—	10k
QO-VH	120/240	1	15–70	—	22k	—
	120/240	2	15–125	—	22k	—
	120/240	2	150–200*	—	22k	—
	240	3	15–100	—	—	22k
QOB-VH	120/240	1	15–70	—	22k	—
	120/240	2	15–150	—	22k	—
	240	3	15–150	—	—	22k
QOH	120/240	2	35–125	—	42k	—
QH, QHB	120/240	1	15–30	—	65k	—
	120/240	2	15–30	—	65k	—
	240	3	15–30	—	—	65k

QO™ Arc-Fault Circuit Breakers

QO arc-fault circuit breakers provide combination arc fault protection with or without ground fault circuit protection as required by the NEC and local code adoption, and comply with UL 1699.

QO Arc-Fault Circuit Breaker Catalog Numbers

Circuit Breaker Type*	Ampere Rating	1P 120 Vac 10 kAIR 1 Space Required	1P 120 Vac 22 kAIR 1 Space Required	2P 240 Vac 10 kAIR 2 Space Required	2P 240 Vac 22 kAIR 2 Space Required
Circuit Breaker Type*	Ampere Rating	Catalog Number	Catalog Number	Catalog Number	Catalog Number
Combination Arc-Fault Interrupter	15 A	QOB115CAFI	QOB115VCAFI	QOB215CAFI	QOB215VHCAFI
Combination Arc-Fault Interrupter	20 A	QOB120CAFI	QOB120VHCAFI	QOB220CAFI	QOB220VHCAFI
Dual Function: Arc-Fault and Ground Fault	15 A	QOB115DF	QOB115VHDF	Use plug-on QO 2-pole dual function MCBs
Dual Function: Arc-Fault and Ground Fault	20 A	QOB120DF	QOB120VHDF	Use plug-on QO 2-pole dual function MCBs

Branch Circuit Breaker Lug Data

Ampere Rating	Circuit Breaker Type	Wire Size (AWG or kcmil)
Ampere Rating	Circuit Breaker Type	Aluminum	Copper
10–30	QO, QOB	(2) #14–#8	(2) #14–#8
35–50	QO, QOB	(1) #8–#2	(1) #8–#2
60–70	QO, QOB	(1) #8–#2	(2) #8–#2
80–125	QO, QOB	(1) #4–2/0	(1) #4–2/0
150	QOB-VH	(1) #4–300 kcmil	(1) #4–300 kcmil
175–200	QO, QO-VH	(1) #4–300	(1) #4–300

NOTE:

Lugs suitable for 75°C wire
Torque QOB connector mounting screws to 18–21 lb-in
Torque labels are included on the circuit breakers with load side lug torque requirements

QO Circuit Breaker Wire Binding Screw Torque Summary

Type	Description and AIC Rating	Torque lb.-in (N-m)
QO/QOB	10 A–30 A, 1, 2 and 3–pole, all interruption ratings	36 (4)
QO/QOB	35 A–70 A, 1 and 2–pole and 40 A–60 A 3–pole, 10kA	45 (5)
QO/QOB-VH, QOH	40 A–125 A, 2–pole, 22kA and 42kA	50 (5.6)
QO/QOB-VH	40 A–100 A, 3–pole, 22kA	50 (5.6)
QO/QOB	70 A–100 A, 3–pole, 10kA	50 (5.6)
QO/QOB-H	40 A–100 A, 2–pole, 240 Vac	50 (5.6)
QO/QOB	80 A–125 A, 2–pole, 10kA	50 (5.6)
QOB-VH	110 A–150 A, 3–pole, 22kA	250 (28)
QO/QOB	150 A–200 A, 2–pole, 10kA	250 (28)
QO/QOB-VH	150 A–200 A, 2–pole, 22kA	250 (28)
Recommended torque values may be found on each QO(B) circuit breaker.