Square D QO120CAFIC AFCI Miniature Circuit Breaker

This breaker is designed exclusively for Square D QO load centers and NQ panelboards. It is not interchangeable with Homeline or other manufacturer panels.

The QO120CAFIC features a pigtail neutral connection, which must be wired directly to the panel neutral bar. The QO120PCAFIC is the Plug-on Neutral version, which connects directly to the neutral bar without a pigtail wire and requires a Plug-on Neutral compatible panel.

A CAFCI breaker protects against both parallel arcs (line-to-line or line-to-ground) and series arcs (arcing across a break in a single conductor). This comprehensive detection helps prevent electrical fires caused by damaged wiring or cords.

Yes. Because it is a pigtail neutral AFCI breaker, the coiled white pigtail wire must be connected to the neutral bar in the panel for the arc fault circuitry to function correctly. The circuit neutral must also terminate directly on the breaker.

No. The QO120CAFIC is a full-size, single-pole breaker that requires one full 3/4-inch space in the panel. AFCI breakers are not available in tandem configurations due to the internal electronics required for arc fault detection.

No, the QO120CAFIC provides Combination Arc Fault (CAFCI) protection only. If you need both AFCI and Class A GFCI protection in a single device, you will need a Dual Function breaker, such as the QO120DFC or QO120PDFC.

Turn off the breaker, hold down the push-to-test button, and turn the breaker back on. If it trips instantly, it indicates a ground fault. A two-second delay indicates an arc fault, and a five-second delay indicates a thermal overload or short circuit.

No. Single-pole AFCI breakers cannot be used on shared neutral circuits because the shared return current will cause nuisance tripping. A two-pole AFCI breaker is required for multi-wire branch circuits.