Square D BJA36045 Three Phase Circuit Breaker

Square D by Schneider Electric's PowerPact B-Frame molded‑case circuit breaker, model BJA36045, is a 3‑pole, 45 A device designed for panelboards and distribution installations in commercial and light industrial settings. Rated for up to 600Y/347 VAC, it delivers a 25 kA short‑circuit interrupting capacity at that voltage, providing robust protection for branch circuits and motor loads. The unit uses a thermal‑magnetic trip mechanism with fixed long‑time and instantaneous trip characteristics, and it arrives in an I‑Line plug‑in configuration with ABC phase connection for easy installation in PowerPact B frame assemblies, featuring load‑side mechanical lug terminals. The trip unit is non‑interchangeable to ensure consistent protection across installations, and the 40°C‑rated continuous current is 45 A. This compact, reliable breaker integrates into Schneider Electric or Square D distribution systems to protect feeders, equipment circuits, and small motors while supporting standard panelboard layouts.