General Electric NSB SRPG400A400 Molded Case Breaker

General Electric NSB SRPG400A400 Molded Case Breaker is a 400‑amp molded case circuit breaker (MCCB) from GE’s NSB line, designed to provide overcurrent protection for electrical circuits in distribution panels with a rugged molded housing suitable for demanding environments. The SRPG400A400 model designation places this unit within GE’s NSB family, signaling a 400 A rating intended for medium to large branch circuits in commercial and industrial power distribution installations. As an MCCB, it interrupts fault or overload currents to protect wiring, devices, and panel infrastructure, and it is commonly installed in panelboards and switchgear assemblies where reliable thermal‑magnetic trip performance is required. This GE MCCB combines the key identifiers—NSB, SRPG400A400, 400A—to help technicians match the correct protection device to a given circuit and ensure alignment with system protection schemes.