Siemens BF120AHH N 20A 120V 1P Circuit Breaker

Siemens BF120AHH 20A 120V 1P circuit breaker is a single-pole molded-case breaker from Siemens' SpeedFax line with built-in ground-fault protection. It is rated for 120 VAC and 20 A and provides 5 mA ground-fault protection with a thermal-magnetic trip for reliable short-circuit and leakage protection. This GFCI-enabled unit belongs to the BLHF/HBLF2 family and uses bolt-on mounting in compatible Siemens panels, offering an interrupt rating up to 65 kAIC at 120 V for robust fault-current clearance. Typical applications include protecting individual 120 V branch circuits in residential or light-commercial distributions—outlets, lighting runs, and other circuits where code requires ground-fault protection. The BF120AHH is the GFCI variant in the BF series, designed to provide quick disconnection on ground faults while meeting common electrical-code requirements for 120 V circuits.