Siemens QF120A GFCI Circuit Breaker

Siemens QF120A GFCI Circuit Breaker is a 20-amp, 1-pole, 120-volt ground-fault interrupter designed for residential electrical protection in Siemens load centers. This plug-in, molded-case breaker belongs to the QF family and offers a 10 kA interrupting rating at 120 V, with a thermal-magnetic trip to quickly shut the circuit down on fault or overload conditions. It is listed as UL Type QPF2 and specifically built as a 1-pole GFCI device, providing reliable protection for circuits where ground faults could pose a shock hazard. A key performance spec is its 5 mA trip sensitivity, which delivers precise ground-fault protection and helps safeguard people and devices on the protected circuit. Typical applications include kitchen, bathroom, exterior, and other receptacle circuits where code-required GFCI protection is needed, making it suitable for both new installations and replacement in compatible Siemens panels. The QF120A is designed for use in US2-series load centers and other panels that accept QF/QPF2-style breakers, ensuring straightforward integration with compatible Siemens electrical systems. Overall, it delivers targeted, single-pole GFCI protection for 120 V circuits, balancing compact form with clear safety benefits for residential wiring projects.