Westinghouse FB3040L Bolt-On Molded Case Circuit Breaker

The Westinghouse FB3040L Bolt-On Molded Case Circuit Breaker is a 40 A, 600 V, three‑pole unit from the FB Frame family designed for bolt‑on mounting in industrial power distribution. It provides thermal‑magnetic overcurrent and short‑circuit protection for 3‑phase, 50/60 Hz networks and is intended for branch circuits and equipment protection in motor control centers, switchboards, and industrial control panels. Common installations include MCCs, motor control systems, conveyors, HVAC infrastructure, automation machinery, and other equipment operating on 600 V. Part Number FB3040L; Brand Westinghouse; Mounting Type Bolt‑On; Protection Type Thermal Magnetic; Number of Poles 3; Phase Compatibility 3 Phase; Frequency Rating 50/60 Hz; Typical Installations MCCs, switchgear, industrial control panels. Common Replacements Eaton FB3040L; Siemens HFB3040; Square D FA3440.