Square D MJA36500 – 500A 3 Pole Molded Case Circuit Breaker Certified

Built for heavy-duty industrial applications, the MJA36500 is a 500A, 3-pole molded case circuit breaker. It features an ET 1.0 electronic trip unit providing precise long-time and instantaneous (LI) protection. This PowerPacT M-Frame breaker plugs into Square D I-Line panelboards and switchboards. It is also an ideal replacement for aging MA and MH frame units. With a 65kAIC rating at 480V, this current-limiting breaker ensures robust fault clearing and system coordination.