Schneider Electric FA34040-1021 Circuit Breaker

Schneider Electric FA34040-1021 is a 3-pole molded‑case circuit breaker from the FA family (F‑frame), rated for 40 A at 480 V AC and designed for I‑Line plug‑on mounting in 3‑phase distribution panels. Its thermal‑magnetic trip mechanism provides overcurrent protection, with an interrupting rating of 18 kA at 480 VAC (25 kA at 240 VAC) to handle short‑circuit events in commercial and light industrial applications. The device accepts copper or aluminum conductors from 14 AWG through 1/0 AWG on the load side, with line‑side connections using the I‑Line interface for quick, robust installation. Typical applications include protection of feeders, motor circuits, and panelboard sections in 480 V three‑phase systems, where reliable coordination with other protective devices is required. This FA‑series breaker integrates with Schneider Electric’s I‑Line ecosystem and is mounted in compatible FA/F‑frame panelboards and enclosures to deliver dependable fault protection in compact form factors.