Schneider Electric FA34040U Low Voltage Circuit Breaker

Schneider Electric’s Square D FA34040U is a 3-pole molded-case circuit breaker (MCCB) rated 40 A for 480 V AC three‑phase systems. Designed with I‑Line plug‑in mounting, it delivers thermal‑magnetic overcurrent protection and is UL/CSA listed for industrial and commercial panel applications. The FA34040U carries an 18 kA interrupting rating at 480 V and is compatible with other FA/LA MCCB components within the Square D FA family, making it suitable for protecting feeders and branch circuits in 480 V distribution setups. This unit operates at standard 50/60 Hz power and is appropriate for use in panelboards and switchgear where reliable protection for 3‑phase circuits is required.