The Siemens Industrial Controls 3TX7112-1LF13 DPDT Relay is an 8-pin electromechanical relay rated at 16A with a 120V coil, designed for precise circuit switching in HVAC control systems. It works by energizing an internal coil that moves double-pole double-throw contacts to control multiple electrical loads simultaneously. https://www.partshnc.com/8pin120vdpdt16amp-relay