Westinghouse FH-21 Thermal Overload Heater Element

Westinghouse FH-21 thermal overload heater element provides thermal overload protection for electric motors in industrial motor control systems. Used with Westinghouse and Cutler Hammer motor starters and overload relays, the FH21 is installed in MCCs, motor starters, and control panels to protect conveyors, HVAC equipment, pumps, compressors, and automation machinery. This unit (part number FH21, alternate FH-21) is noted as missing mounting screws and carries a Z60 condition notation; it is commonly used for replacement or retrofit by maintenance teams, OEMs, and electrical integrators, with common equivalents including Eaton FH21, Cutler Hammer FH21, and Siemens overload heater.