Square D FA14020C Type FA I-Line Circuit Breaker

The Square D FA14020C is a 1-pole, 20-amp molded-case circuit breaker from Square D’s FA family, designed for I-Line panelboards and rated for 277 VAC in 480Y/277V systems with an 18 kA interrupting capacity at 277 V. This plug-in I-Line device employs thermal-magnetic trip protection and installs in FA I-Line bus assemblies, enabling quick replacement and reliable protection within compact distribution configurations. With a single phase, 20 A rating, it protects a 277 V circuit such as lighting loads, receptacle circuits, or control circuits fed from 277 V distribution, and its 18 kAIC rating helps limit fault currents without risking downstream damage. As part of the FA I-Line lineup, FA14020C conforms to Square D’s panelboard design language, pairing with compatible FA-series breakers and bus bars to provide a cohesive, space-efficient protection solution for commercial or industrial electrical systems.