Schneider Electric FA34040 I-Line Circuit Breaker

Schneider Electric FA34040 I-Line molded‑case circuit breaker is a three‑pole, 40 A device designed for 480 V AC systems, part of the FA (F‑Frame) family with I‑Line plug‑in mounting for Schneider Electric panelboards and I‑Line bus systems. It provides thermal‑magnetic protection with an 18 kA interrupting rating at 480 VAC, enabling fast isolation of faults on three‑phase feeders while protecting conductors and equipment. The FA34040 utilizes I‑Line plug‑in mounting for quick installation and field service, and its load‑side terminals accept 14 AWG through 1/0 AWG aluminum or copper conductors, while line‑side connections engage the I‑Line bus interface. This 40 A, 480 V, 3P unit is designed to deliver reliable overcurrent protection in Schneider Electric I‑Line distribution schemes, aligning with common panelboard configurations where compact MCCBs are required to protect feeders and motors in commercial and light industrial applications.