Square D LAL36400 Three Pole Industrial Circuit Breaker

Square D LAL36400 is a 400 A, 3-pole molded-case circuit breaker built for 600 VAC service, featuring line-and-load lug terminals compatible with conductors from 1 AWG up to 600 kcmil and a 22 kA interrupting rating. As part of Square D’s LA-frame, I-Line style LAL family, this device provides thermal-magnetic protection with distinct long-time and instantaneous trip functions to guard feeders and motors in industrial power-distribution equipment. The LAL36400 is designed for use as a main disconnect or large feeder breaker in 3-phase 600 V systems, and its lug terminals simplify field wiring while maintaining robust performance in rugged environments. Typical applications include industrial control panels, machine tool circuits, conveyors, and other heavy-duty equipment installations where reliable fault interruption is required at 600 V and where a 400 A, 3-pole protection device fits the panel architecture. With its proven Square D construction, the LAL36400 supports dependable protection for large feeders and aligns with other LA-frame MCCBs in inventory, offering consistent trip characteristics and compatibility across common industrial distribution schemes.