1640CT0801

Branch Circuit Breakers (Bolt-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
240 3 10–100 10k
QO-H, QOB-H 240 2 15–125 10k
QO-VH 120/240 1 15–70 22k
120/240 2 15–125 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-QOHB 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
Catalog Number Catalog Number
Combination Arc-Fault Interrupter 15

QO(B)115CAFI

QO(B)115VCAFI

20

QO(B)120CAFI

QO(B)120VHCAFI

Combination Arc-Fault and Ground Fault Circuit Interrupter (Pigtail Neutral) 15

QO(B)115DF

QO(B)115VHDF

20

QO(B)120DF

QO(B)120VHDF


Branch Circuit Breaker Lug Data

Ampere Rating Circuit Breaker Type Wire Size
Aluminum Copper
10–30 QO, QOB (2) #12–#8 (2) #14–#8
35–50 QO, QOB (1) #8–#4 (1) #8–#4
60–70 QO, QOB (1) #6–#2 (2) #6–#2
80–125 QO, QOB (1) #4–2/0 (1) #4–2/0
150 QOB-VH (1) #4–300 kcmil (1) #4–300 kcmil
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 Breaker 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)
Recommended torque values may be found on the label of the Panelboards.
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