Westinghouse FDB3125 Bolt-On Molded Case Circuit Breaker

Westinghouse FDB3125 Bolt-On Molded Case Circuit Breaker delivers 125 A of three‑phase, 600 VAC overcurrent protection in a bolt‑on, molded‑case format. Part of the FDB frame family, this 3‑pole device uses thermal‑magnetic trip protection for branch circuits and equipment in industrial power distribution, motor control centers, switchboards, and control panels operating at 50/60 Hz. It is designed for panel or switchboard mounting and is commonly installed in MCCs, conveyor systems, HVAC infrastructure, and automation equipment requiring high‑amperage protection. Common replacements include Eaton FDB3125, Siemens HFD3125, and Square D FA34125.