Square D by Schneider Electric FYB-14020-A is a single-pole, 20-amp molded-case circuit breaker designed for 277 V I-Line panel installations. It employs thermal-magnetic trip technology (Type FYB) and delivers up to 18 kA of interrupting capacity at 277 V, with I-Line plug-in mounting for compatibility with Square D panelboards. Finished in black, this 1P device protects 277 V branch circuits in commercial and light industrial distribution—such as lighting runs and general power feeds—in suitable Square D I-Line systems.
