Siemens QF120ACSA GFCI Circuit Breaker 1 Pole 20 Amp

Siemens QF120ACSA is a 1-pole, 20-amp, 120-volt GFCI circuit breaker designed for residential load centers. This plug-in style unit provides ground-fault protection on a single 120V circuit and is CSA-listed with a 10 kA interrupting rating, helping limit fault currents in typical household panels. It includes an auto-test/self-test function to periodically verify proper operation of the sensing circuitry and protective mechanism, enhancing reliability in everyday use. Cataloged as US2:QF120ACSA, the breaker belongs to Siemens’ QF family and Siemens lists this model as a predecessor to the newer QF120A line. Common applications include kitchens, bathrooms, garages, and outdoor receptacle circuits where GFCI protection is required by electrical codes. With a 20 A rating, it targets branch circuits that demand ground-fault protection while maintaining standard load capability for everyday appliances and outlets. When selecting a replacement or upgrade, verify panel compatibility with Siemens Type QF/GFCI devices in your specific load center to ensure proper fit and certification.