The Westinghouse GF425N BU molded case circuit breaker provides 400 A at 240 V in a 3-pole, three-phase configuration for industrial power distribution and branch-circuit protection. It employs Thermal Magnetic protection and is panel- or switchboard-mounted, making it suitable for use in MCCs, switchgear, and industrial control panels operating on 50/60 Hz. The NN1 designation notes inventory/condition, and common replacements for this frame size include JXD63B400 and LA36400, with Eaton GF425N listed as another compatible option.
