Westinghouse HFB3040L Molded Case Circuit Breaker

Westinghouse HFB3040L Molded Case Circuit Breaker is a 40 Amp, 3-pole protective device designed for industrial power distribution and motor control systems. This 3-phase molded case breaker provides overload and short-circuit protection for branch circuits up to 600 VAC and 50/60 Hz, making it suitable for MCCs, industrial control panels, pumps, conveyors, and manufacturing equipment. With bolt-on mounting and a molded case construction in the HFB frame series, it delivers reliable thermal-magnetic trip protection to respond to overloads and faults. The device is intended for branch circuit protection in industrial power distribution systems and is commonly installed in motor control centers and OEM machinery. Common replacements include Eaton HFD3040, Cutler-Hammer HFD3040, and Westinghouse HFB3040 for similar ratings.