Schneider Electric MJL36400 Molded Case Circuit Breaker

Schneider Electric’s MJL36400 is a PowerPact M-Frame molded case circuit breaker (MCCB) configured as a 3-pole unit rated for 400 amperes, intended for three‑phase distribution in commercial and industrial electrical systems, and designed to protect feeders and equipment from overcurrent while fitting into standard Square D/Schneider panels and enclosures. It is designed for up to 600 V AC service and delivers a 25 kA interrupting capacity at that voltage, providing reliable interruption for fault currents typical in medium‑voltage distribution networks. The MJL36400 includes line and load lugs for straightforward connection and integrates with the broader PowerPact family of circuit breakers, enabling consistent protection schemes alongside other PowerPact M-frame devices. As a 400 A, 3P device in Schneider Electric's portfolio, the MJL36400 is commonly chosen as a main breaker or feeder protection in 600 V systems, where standardization with Square D accessories and panels supports easier maintenance and replacement.