Westinghouse HFB3150 Molded Case Circuit Breaker

The Westinghouse HFB3150 is a 150 Amp, 3-pole molded case circuit breaker designed for overload and short-circuit protection in industrial power distribution and motor control systems. It is rated for 600 VAC and 50/60 Hz with 3-pase compatibility, employing a thermal-magnetic trip for reliable protection in industrial equipment. The device uses bolt-on mounting within the HFB frame and is constructed as a molded case breaker, typically installed in MCCs, industrial control panels, manufacturing equipment, HVAC systems, automation panels, heavy machinery, and commercial electrical distribution assemblies. Common replacements include Eaton HFD3150 and Cutler-Hammer HFD3150, with Westinghouse HFB3150L noted as a related variant.