Specification
QO
®
and QOB Miniature Circuit Breakers
General Information
5
07/2008
© 1998–2008 Schneider Electric
All Rights Reserved
Interrupting Rating
The interrupting rating of a circuit breaker is the highest current at rated voltage that the circuit breaker
is intended to interrupt under standard test conditions. A circuit breaker must be chosen so that the
interrupting rating is equal to or greater than the maximum available short-circuit current at the point
where the circuit breaker is applied in the system.
DC Voltage Rating
QO and QOB circuit breakers are available with a UL Listed 48 Vdc rating. See Table 1. Refer to
Square D Data Bulletin 0601DB0401 for additional information on dc-rated circuit breakers.
Table 1: Interrupting Ratings
Circuit Breaker Type
Number
of Poles
Ampere
Rating
UL Listed Interrupting Rating
1
1
10 kA and 5 kA are 1Ø-3Ø.
120 Vac 120/240 Vac 240 Vac 48 Vdc
2
2
DC ratings do not apply to circuit breakers rated 10 A.
QO
1 10–70 A 10 kA 10 kA — 5 kA
2
10–70 A 10 kA 10 kA 10 kA 5 kA
80–100 A 10 kA 10 kA 10 kA —
110—200 A 10 kA 10 kA — —
3
15–60 A 10 kA 10 kA 10 kA 5 kA
70–100 A 10 kA 10 kA 10 kA —
QOB
1 10–70 A 10 kA 10 kA — 5 kA
2
10–70 A 10 kA 10 kA 10 kA 5 kA
80–100 A 10 kA 10 kA 10 kA —
110—125 A 10 kA 10 kA — —
3
15–60 A 10 kA 10 kA 10 kA 5 kA
70–100 A 10 kA 10 kA 10 kA —
QO-H, QOB-H 2 15–100 A 10 kA
3
3
UL Listed 5,000 AIR on 3Ø grounded B-Phase Delta system.
10 kA
3
10 kA
3
—
QO-VH
1 15–30 A 22 kA 22 kA — —
2 15–200 A 22 kA 22 kA — —
3 15–100 A 22 kA 22 kA 22 kA —
QOB-VH
1 15–30 A 22 kA 22 kA — —
2 15–125 A 22 kA 22 kA — —
3 15–150 A 22 kA 22 kA 22 kA —
QOH 1 40–125 A 42 kA 42 kA — —
QH, QHB
1 15–30 A 65 kA 65 kA — —
2 15–30 A 65 kA 65 kA — —
3 15–30 A 65 kA 65 kA 65 kA —
QO-GFI, QOB-GFI
1 15–30 A 10 kA — — —
2 15–60 A 10 kA 10 kA — —
QO-VHGFI, QOB-GFI 1 15–30 A 22 kA — — —
QO-AFI, QOB-AFI 1 15–30 A 10 kA — — —
QO-CAFI, QOB-CAFI 1 15–30 A 10 kA — — —
QO-VHCAFI, QOB-VHCAFI 1 15–30 A 22 kA — — —
QO-EPD, QOB-EPD
1 15–30 A 10 kA — — —
2 15–60 A 10 kA 10 kA — —
QO-PL
1 15–30 A 10 kA 10 kA 10 kA —
2 15–30 A 10 kA 10 kA 10 kA —
3 15–30 A 10 kA 10 kA 10 kA —