Westinghouse FH37 Thermal Overload Heater Element

The Westinghouse FH37 thermal overload heater element provides precise thermal overload protection for electric motor applications within industrial motor control systems. This FH-series heater is designed for use in Westinghouse and Cutler Hammer motor starters and overload relay assemblies, compatible with the A200 Series starters and NEMA sizes 0, 1, and 2. Operating current range is 7.46–8.11 A and the unit supports 50/60 Hz service for reliable protection in conveyors, HVAC equipment, pumps, compressors, automation machinery, and other motor-driven systems. Common replacements include Eaton FH37, Cutler Hammer FH37, and Siemens overload heater equivalents, and it is installed in overload relays within motor control centers (MCCs) and industrial control panels.