QO120DF – SQUARE D 1P 20 GFCI/AFCI BREAKER

The QO120DF combines both AFCI (Arc Fault Circuit Interrupter) and GFCI (Ground Fault Circuit Interrupter) protection in a single 1-pole breaker. A standard AFCI breaker only protects against dangerous arc faults that can cause fires, while a GFCI breaker only protects against ground faults that pose a shock hazard. Dual-function units like the QO120DF satisfy the requirements of both, which is increasingly mandated by the Canadian Electrical Code (CEC) for kitchens, bathrooms, bedrooms, and outdoor circuits — eliminating the need for separate AFCI and GFCI devices on the same circuit.

Yes — like all Square D QO AFCI and dual-function breakers, the QO120DF has a white pigtail wire that must be connected to the neutral bar in your loadcentre. This is in addition to the standard line and load connections. Most Square D QO loadcentres support this, but you should confirm that your panel has an available neutral lug terminal. If you're unsure, send us your panel model and we can help verify compatibility.

Yes, the QO120DF is a common upgrade choice when bringing an existing circuit up to current Canadian Electrical Code requirements — for example, when renovating a kitchen, bathroom, or adding an outdoor outlet. Because it is a plug-in QO-series breaker, it installs in the same slot as a standard QO 1-pole breaker. Just remember to connect the neutral pigtail to the panel's neutral bar as part of the installation. We recommend confirming your panel model with us to ensure a smooth, code-compliant retrofit.