Schneider Electric LGL36400CU31X Circuit Breaker

Schneider Electric's Square D PowerPact LGL36400CU31X is a 400-amp, three-pole molded-case circuit breaker in the PowerPact L-Frame family designed for 600-volt AC applications. It provides 18 kA interrupting capacity, enabling rapid, safe interruption of short circuits in industrial distribution panels, switchgear, feeders, and motor-control centers. The unit employs a MicroLogic 3.3 electronic trip unit, offering 100% rated protection with long-time and instantaneous trip characteristics to balance selectivity and protection across the downstream circuit. Copper line and load lug terminations (CU) support durable, high-integrity connections compatible with standard PowerPacT installations. As part of the LGL sub-range, this breaker combines compact form with robust protection performance, making it suitable for medium- to large-scale panel assemblies where reliable fault interruption and precise trip coordination are required. The catalog designation LGL36400CU31X communicates a 400 A rating, three-phase configuration, 600 VAC rating, and 18 kAIC interrupting capability, aligning with Schneider Electric protection ecosystems and facilitating straightforward replacement in existing PowerPact systems.