Schneider Electric MJA36600 Three Pole Circuit Breaker

Square D by Schneider Electric PowerPact MJA36600 is a 3-pole molded-case circuit breaker built on the PowerPact M (M-frame) platform for industrial power distribution, rated for 600 V AC and 600 A with plug-in I-Line mounting. It uses an electronic trip unit (PowerPact M) for precise, field-adjustable protection of feeders and motor circuits, and its modular construction supports straightforward testing, maintenance, and replacement within panelboards. The device carries a 25 kA interrupt rating at 600 V (25 kAIC) and is offered with termination options including line-lug or box-lug configurations depending on the shipment, providing flexibility for different panel or bus configurations. In practice, MJA36600 serves as a main-distribution or MCC breaker in industrial and commercial environments where three-phase protection at up to 600 A is required, and it is commonly stocked by authorized distributors such as Mouser, Grainger, Rexel, and Omnicable.