Westinghouse BF84F Electromechanical Control Relay

Westinghouse BF84F Electromechanical Control Relay is a coil-operated switching device designed to control higher-voltage circuits from a low-voltage input. It uses a 120 V coil to energize internal contacts, which are rated for 300 V and 10 A, providing a mechanical means to make or break a circuit in control panels or equipment. The BF84F designation identifies a Westinghouse relay series. When the coil is energized, the relay changes the state of its contact set to switch the connected load, offering electrical isolation between the control side and the power side. The 120 V coil is compatible with common control circuits that provide line-level or low-voltage control signals, depending on system design, and the 300 V / 10 A contact rating defines the maximum voltage and current the contacts can carry safely. This electromechanical relay is typically used in control logic, interlocks, sequencing, and equipment control where a reliable mechanical switching action is required.