Siemens Q120AFC Arc Fault Circuit Interrupter Breaker

Siemens Q120AFC is a 1-pole, 20-amp arc-fault circuit interrupter (AFCI) breaker from the Siemens Q-Series, designed for 120/240V residential panels. As a combination AFCI, it detects arcing faults and interrupts supply with a 10 kA interrupting rating at 120V, and it is a plug-in type rated for 120/240V. This UL-listed QAF-type breaker features long-time and instantaneous trip functions, a thermal-magnetic trip mechanism, and load-side lug terminals in a molded-case enclosure for straightforward installation. Catalog literature also lists the same model as QA120AFC, reflecting the 1-pole, 20A AFCI specification common to this family.