Westinghouse FDB3050NSNBC7 Molded Case Circuit Breaker

Westinghouse FDB3050NSNBC7 is a 3-pole molded case circuit breaker from the FDB Frame family, rated 50 A and 600 VAC for medium‑amperage three‑phase protection. This thermal‑magnetic device delivers overcurrent and short‑circuit protection for branch circuits and equipment in industrial power distributions, and is commonly installed in motor control centers, switchboards, and industrial automation panels, as well as manufacturing equipment, conveyors, and HVAC systems operating on 50/60 Hz power. It is panel or switchboard mounted and carries the NSNBC7 designation; common replacements include Eaton FDB3050, Siemens HFD3050, and Square D FA3450.