Square D LGL37040D30AB Molded Case Circuit Breaker

Square D LGL37040D30AB is a PowerPact L‑Frame molded‑case circuit breaker from Square D by Schneider Electric. This 400 A, three‑pole MCCB uses an electronic trip unit to provide precise overcurrent protection for industrial feeders and motor circuits, enabling coordinated protection in dense distribution panels. The unit carries a DC rating up to 500 V and a 20 kA interrupt rating, with commonly listed AC ratings around 480 V for typical PowerPact L configurations. Designed for hard‑working commercial and industrial power systems, it fits PowerPact L frame enclosures and is used where high current protection, reliable trip performance, and integration with downstream devices are required. When selecting for a project, ensure the model LGL37040D30AB matches the system voltage and interrupt requirements, as ratings can vary by configuration.