Westinghouse HFB3100 Molded Case Circuit Breaker

The Westinghouse HFB3100 is a 100 Amp, 3-pole molded case circuit breaker designed for industrial power distribution and motor control panels. This 600 VAC, 50/60 Hz thermal-magnetic device uses bolt-on mounting in the HFB frame series to deliver reliable overload and short-circuit protection for 3‑phase branch circuits in demanding environments. With its molded-case construction and 3-pole design, it is suitable for industrial power distribution systems and is commonly installed in motor control centers (MCCs), industrial automation cabinets, OEM machinery, processing equipment, pump systems, conveyor lines, and HVAC installations where dependable protection for connected equipment is essential. The unit provides overload and short-circuit protection and is compatible with applications requiring robust branch circuit protection. Common replacements include Eaton HFD3100, Cutler-Hammer HFD3100, and Westinghouse HFB3100L.