Schneider Electric’s Square D FA34100 is a 100 A, 3‑pole molded‑case circuit breaker (Type FA) with I‑Line plug‑in mounting designed for 480 VAC service. It provides thermal‑magnetic protection with an 18 kA interrupting rating at 480 VAC (25 kA at 240 VAC) and uses ABC phase connection for three‑phase circuits, with an 80% continuous‑duty rating. Schneider Electric lists FA34100 as discontinued as of May 24, 2021, with the recommended replacement being the PowerPacT B family, specifically the BDA36100 100 A, 3‑pole unit rated for 600Y/347 VAC and 14 kA I‑Line.
