Square D FA14020B I-Line Circuit Breaker 20 Amp

The Square D FA14020B I-Line Molded Case Circuit Breaker is a 20-amp, single‑pole protection device in Schneider Electric’s FA family designed for use in I‑Line panelboards. It is rated for 277 VAC (with a 480Y/277 VAC configuration commonly listed) and offers an 18 kA interrupting rating at 480Y/277 VAC (25 kA at 120/240 VAC). The breaker accepts 14‑4 AWG aluminum or copper conductors on the line side and uses load‑side lugs, with a line‑side I‑Line connection and Phase Connection B, for straightforward installation in FA‑series panels. It employs a thermal‑magnetic trip mechanism and is specified for 40°C ambient operation, with I‑Line plug‑in mounting. This 1P device provides reliable overcurrent protection for dedicated circuits such as lighting or other 277V‑fed equipment in appropriate industrial or commercial installations, delivering precise, code‑compliant protection within Square D’s I‑Line infrastructure.