Square D By Schneider Electric LJA36400U31X Circuit Breaker

Square D by Schneider Electric LJA36400U31X PowerPact L-frame molded‑case circuit breaker delivers 400 A of continuous current rating and a 600 V AC maximum, packaged as a rugged 3‑pole, I‑Line, cable‑in / cable‑out device built for demanding industrial power distribution. Engineered to protect 3‑phase feeders and heavy equipment, it interrupts fault currents and overloads to safeguard motors, controllers, and switchgear in panelboards, motor control centers, and other industrial assemblies, while preserving a compact footprint suitable for retrofit or new installations. This unit is part of the PowerPact L family, offering established reliability and interchangeability with other L‑Frame breakers, and is UL listed and CSA certified for use in commercial and industrial electrical systems. The LJA36400U31X catalog number identifies a 400 A, 600 V, 3‑pole PowerPact L device with cable‑in / cable‑out termination, designed to integrate with Square D panels and standard wiring practices across three‑phase networks.