Schneider Electric Square D FA34040 Circuit Breaker

Schneider Electric Square D FA34040 is a 40A, 480V, three‑pole molded‑case circuit breaker from the FA family, designed for I‑Line plug‑in mounting in industrial and commercial panelboards. With a thermal‑magnetic trip, it provides reliable overcurrent protection for 3‑phase feeders, and carries an 18 kA interrupting rating at 480V to help limit fault energy. It accepts up to 14–1/0 AWG aluminum or copper conductors on both the line side and the load side, and uses line‑side I‑Line connections with load‑side lugs for straightforward integration into Schneider Electric FA panels. Typically used in 480V distribution networks within industrial and commercial settings, the FA34040 safeguards feeders and equipment connected to 3‑phase circuits in panelboards that require reliable 3P protection. As part of the I‑Line FA family, the FA34040 is designed for plug‑in replacement in compatible Schneider Electric panel systems, delivering consistent performance in demanding environments.