Westinghouse WCM1-400M Molded Case Circuit Breaker

The Westinghouse WCM1-400M 3-pole molded case circuit breaker (MCCB) is rated for 400 A and 800 V, providing reliable overcurrent and short-circuit protection in industrial power distribution panels. It is designed for panel mounting and is commonly installed in switchboards, motor control centers, and industrial control panels to safeguard heavy-duty circuits in demanding environments. Used across industrial and commercial electrical systems, it supports electrical distribution assemblies in manufacturing facilities, processing plants, and automation systems, and is suitable for panel retrofits and power system restorations. Manufacturer Part Number (MPN) WCM1-400M; Brand Westinghouse; Common replacements include Eaton NZM4 MCCB, Siemens Sentron MCCB 400A, and Square D PowerPact MCCB 400A.