Schneider Electric SE BDA34040Y Circuit Breaker

PowerPact B-Frame molded-case circuit breaker, model BDA34040Y, from Schneider Electric (Square D), is a 40 A, 3-pole device designed for 480Y/277 VAC three‑phase power systems. It uses a thermal‑magnetic trip unit for reliable overcurrent protection and mounts in I‑Line panel configurations for quick plug‑in installation in compatible PowerPact B‑frame assemblies. The breaker delivers an 18 kA interrupting rating at 480 VAC (14 kA at 600 VAC and 25 kA at 240 VAC), making it suitable for protecting feeders and distribution circuits in industrial environments. It features load‑side mechanical lug terminals for secure wiring and is specified with an 80% rating, matching its model designation. This component is part of Schneider Electric’s PowerPact B family, a compact, rugged solution for protecting 3‑phase feeders in commercial and industrial applications operating at high line voltages.