Siemens QA120AFC Circuit Breaker 1 Pole 20 Amp 120 Volt

Siemens QA120AFC is a 1-pole arc-fault circuit interrupter (AFCI) plug-in breaker for 120-volt residential circuits, rated at 20 amps. It installs in compatible Siemens load centers and provides combination AFCI protection by monitoring for arcing faults and automatically interrupting power to the protected branch circuit. The device carries a 10 kA interrupting rating, ensuring rapid disconnection under fault conditions. As part of the Siemens QA family, QA120AFC is a single-pole, 120 V AFCI breaker designed for standard branch-circuit protection, with variants in this line including QA120AFCH and QA120AFCHH for different configurations, as well as plug-on-neutral versions such as QA120AFCNP for panels that require a neutral connection. Typical applications include protecting living-area and bedroom circuits where AFCI protection is mandated by modern electrical codes; it is intended for use in appropriate Siemens panels and should be installed in accordance with national and local electrical codes. This model—the 20 A AFCI breaker—helps mitigate fire hazards from arc faults while preserving normal circuit functionality for lighting and receptacle circuits in a residential setting.