Struthers-Dunn B255XBXPLM-120A Relay

Struthers-Dunn B255XBXPLM-120A is a dual-coil, two-form-C latching plug-in relay in the 255 Series. It uses two coils to set and reset its DPDT (2 Form C) contacts, and the contact state is retained after the operate coil is energized and the coil power is removed, enabling a latched output for sequencing and control logic. The XBX designation indicates DPDT contacts, and the PLM suffix denotes a plug-in mounting variant for quick replacement in compatible bases. The coil is rated for 120 VAC operation, making it suitable for industrial control panels where momentary energization toggles two independent circuits. Typical applications include logic gating, signal routing, and interlock-style control where a latched state is beneficial.