Specification
QO
®
and QOB Miniature Circuit Breakers
Special Application Circuit Breakers
7
07/2008
© 1998–2008 Schneider Electric
All Rights Reserved
Switching Duty (SWD) Circuit Breakers
QO and QOB circuit breakers are suitable for switching 120 Vac fluorescent lighting loads. The
switching duty (SWD) listing applies only to one-pole 15 and 20 A circuit breakers rated at 347 Vac or
less. The circuit breakers are subjected to specified temperature rise tests at predetermined periods
during the endurance operations.
Terminations
The 10–30 A circuit breakers have pressure plate terminals suitable for single or two-wire terminations.
Copper or aluminum conductors may be used as outlined in Table 2. QO-GFI 15–30 A and QO-AFI
circuit breakers have pressure plate terminals suitable for single-wire terminations. These circuit
breakers are suitable for use with 60°C or 75°C conductors.
The QO 35–200 A and all QO-PL and QOT tandem circuit breakers have box-type lugs suitable for
single-wire terminations. These circuit breakers are suitable for use with 75°C conductors.
Special Application Circuit Breakers
There are several special application circuit breakers in the QO family:
• QO-HM and QOB-HM High-Magnetic Circuit Breakers
• QO-HID and QOB-HID Circuit Breakers
• QO and QOB Miniature Switches
• QOK and QOBK Key-Operated Circuit Breakers
• QO-GFI and QOB-GFI Qwik-Gard
®
Circuit Breakers
• QO-EPD and QOB-EPD Equipment Protection Devices
• QO-SWN and QOB-SWN Switch Neutral Circuit Breakers
• QOT Tandem Circuit Breakers
• QO-PL and QOB-PL Powerlink
®
Circuit Breakers
• QO-AFI and QOB-AFI Branch Feeder Arc-Fault Circuit Interrupters (AFCI)
• QO-CAFI, QOB-CAFI Combination Arc-Fault Circuit Interrupters (AFCI)
This following sections describe the special application circuit breakers and provides application
information for their use.
Table 2: Terminations
Circuit Breaker Types Rating Wire Size
QO, QOB, QO-VH, QOB-VH
10–30 A
(1) 14–8 AWG (1.5–3.3 mm
2
) Al/Cu
(2) 14–10 AWG (1.5–2.6 mm
2
) Cu
35–70 A (1) 8–2 AWG (3.3–6.5 mm
2
) Al/Cu
80–125 A (1) 4–2/0 AWG (5.2–9.3 mm
2
) Al/Cu
QO, QOB, QO-VH 150–200 A (1) 4 AWG–300 kcmil (5.2–50 mm
2
) Al/Cu
QOB-VH 110–175 A (1) 4 AWG–300 kcmil (5.2–50 mm
2
) Al/Cu
QOT 15–20 A
(1) 12–8 AWG (2.0–3.3 mm
2
) Al
(1) 14–8 AWG (1.6–3.3 mm
2
) Cu
QO-CAFI, QO-AFI, QO-GFI, QO-EPD,
QOB-CAFI, QOB-AFI, QOB-GFI, QOB-EPD
15–30 A
(1) 12–8 AWG (2.0–3.3 mm
2
) Al
(1) 14–8 AWG (1.6–3.3 mm
2
) Cu
QO-GFI, QO-EPD,
QOB-GFI, QOB-EPD
40–60 A
(1) 12–4 AWG (2.0–4.1 mm
2
) Al
(1) 14–6 AWG (1.6–4.1 mm
2
) Cu
QO-PL 10–60 A (1) 12–2 AWG (2.0–6.5 mm
2
) Al