Schneider Electric FA34100AK Molded Case Circuit Breaker

The FA34100AK is a 3-pole, 100 A molded‑case circuit breaker from Schneider Electric’s Square D FA family, designed for 480 V three‑phase systems and intended for I‑Line plug‑in mounting in FA‑frame panels. It employs a thermal‑magnetic trip unit that provides both overload protection and short‑circuit protection, making it suitable as a main disconnect or feeder in commercial and industrial distributions. Typical interrupting ratings listed for this model include up to 18 kA at 480 VAC, with some catalog pages showing 25 kA at 240 VAC, reflecting its capability to interrupt high fault currents. The FA34100AK carries common safety listings (UL/CSA/NOM) associated with the FA/LA line, reinforcing its suitability for broad electrical installations. Equipped with standard line and load terminal access and an I‑Line mounting style, this 100 A MCCB is designed to integrate into Schneider Electric protection schemes while delivering reliable, code‑compliant protection for equipment, panels, and distribution boards operating at 480 V.