Schneider Electric Square D LAP36400MB1021 is a 400 A, three‑pole molded‑case circuit breaker in the LA/PowerPact family designed for 600 V AC distribution and remote protection schemes. It delivers 22 kA interrupting capacity at 600 VAC and a 250 VDC rating, and it is configured for unit mounting in commercial/industrial panels. The MB1021 variant includes a thermal‑magnetic trip with a short‑handle design and a shunt‑trip option for remote disconnection, providing flexible, code‑compliant overcurrent protection for feeders and motor loads on 3‑phase systems.
