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White rectangular miniature circuit breaker with paddle actuator, plug-in mount, 4.1 in long by .8 in wide

SQUARE D

SQUARE D QO125GFI Circuit Breaker 25A 1 Pole 120V AC

SKU CH-PWYZ-ZJM9Y

Ground-fault circuit interrupter rated 25 A at 120 V AC with 10 kA interrupting capacity for QO load centres

  • Ground-fault protection at 5 mA sensitivity
  • 25 A single-pole rating for 120 V AC circuits
  • 10 kA interrupting capacity at 120 V AC
  • Plug-in mounting fits QO and NQ load centres
  • Compact 4.1 in by .8 in frame size

Miniature GFCI Breaker, 25 A

The SQUARE D QO125GFI is a single-pole ground-fault circuit interrupter rated at 25 amps and 120 V AC. It provides Class A protection with a 5 mA trip threshold for personnel safety. The breaker fits QO and NQ series load centres using a plug-in mounting style.

10 kA interrupting at 120 V

The device carries a maximum AIR rating of 10 kA at its rated voltage, limiting the fault current it can safely clear. It is not rated for DC applications, so use is confined to alternating-current branch circuits. The paddle actuator gives a clear visual indication of the tripped state.

Pressure-plate terminals, 4.1 in length

Connections are made through pressure-plate terminals that accept standard copper conductors without special tools. The 100 A frame size and 0.8 in width allow dense packing in compatible panelboards. The 4.1 in length ensures consistent alignment with other QO series breakers.

Highlights

  • Ground-fault protection at 5 mA sensitivity
  • 25 A single-pole rating for 120 V AC circuits
  • 10 kA interrupting capacity at 120 V AC
  • Plug-in mounting fits QO and NQ load centres
  • Compact 4.1 in by .8 in frame size

Specifications

BrandSQUARE D

Questions about this item

Should I choose the 25 A single-pole version or a different amperage for my 120 V branch circuit?

Select the 25 A single-pole breaker only when the circuit conductors and load are rated for 25 amperes; other QO-series ratings exist but must match the wire size and design current of the specific branch.

What does the 10 kA interrupting rating mean once the breaker is installed in a panel?

It means the breaker can safely clear a short-circuit current up to 10 000 amperes at 120 V AC without damage, protecting downstream wiring and equipment during a fault.

Does the plug-in QO mounting limit the breaker to certain panelboards?

Yes, the plug-in QO frame fits only Square D QO load centres and NQ panelboards rated for the 100 A frame size.

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