Siemens Q120AF U Circuit Breaker

Siemens Q120AF U is a 1-pole, 20-amp arc-fault circuit interrupter (AFCI) breaker for 120-volt circuits, part of Siemens' QAF family. It provides arc fault protection by monitoring circuit current for hazardous arcing and interrupts power when detected, helping reduce fire risk in branch circuits. The device is a plug-in, molded-case breaker rated for 120 VAC with a 20 A nominal current and a 10 kA interrupting capacity at 120 V, and it features load-lug terminals for connections and a plug-in mount compatible with Siemens load centers that accept QAF/AFCI breakers. Typical applications include protecting 120V branch circuits in residential and light commercial panels where AFCI protection is desired.