Square D FAL34040 I-Line Circuit Breaker Series 2

Square D FAL34040 I-Line Series 2 three‑pole molded‑case circuit breaker, rated 40 A at 480 V AC, is a thermal‑magnetic overload protection device designed for industrial and commercial 3‑phase power distribution. It delivers an 18 kA interrupting capacity at 480 V and uses I‑Line mounting with line and load lug terminals, with some configurations supporting feed‑through connections for subfeed protection in Square D I‑Line panelboards and switchboards. The enclosure is gray, and the unit is part of the FA/FA L family’s I‑Line offerings, optimized for reliable protection of feeders and branch circuits in 480 V systems. When selecting this model, be aware that variants exist within Series 2, including potential shunt‑trip options depending on the exact order code.