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The EJB36040 Square D 3 Phase Circuit Breaker provides reliable overcurrent protection at 40 Amps and 600 Volts. Designed for durability and efficiency, this breaker ensures safe operation in various electrical systems. Ideal for industrial and commercial applications, it features a robust construction that withstands demanding environments. Trust Square D for quality performance.
The EJB is a compact molded-case frame in Square D's commercial/industrial breaker lineup, rated up to 600V with a 25kA interrupt capacity. It is physically distinct from residential QO/Homeline plug-in breakers and from larger frames like the EDB or FA/FH series. Always verify frame compatibility with your panelboard before ordering.
Square D has transitioned many EJB-frame products over time, and availability can vary. Northern Breaker Group specializes in hard-to-find and obsolete breakers — contact us with your requirements and we can advise on new, reconditioned, or direct-replacement options for your application.
The EJB36040 is rated for use at voltages up to 600V AC, which means it is fully suitable for 208V, 240V, 480V, and 600V 3-phase systems — as long as the system's available fault current does not exceed the breaker's 25kA interrupt rating. Always confirm system parameters with a qualified electrician.
