Siemens 3TH2022-0AC2 Three-Phase AC Contactor

Siemens 3TH2022-0AC2 is a Sirius auxiliary contactor (Hilfsschütz) in a 22E format that provides 2 normally open and 2 normally closed auxiliary contacts, all in a compact 4-pole configuration. The device is coil-operated with a 24 V alternating-current control voltage (50/60 Hz) and wired via screw terminals, conforming to DIN EN 50011 and EN 50 011 standards for control-relay applications. Designed for industrial automation control panels, it serves to interlock signals or pilot other equipment and contactors, enabling safe sequencing and logic in low-power control circuits. As a Siemens 3TH-series auxiliary relay, it integrates smoothly with compatible Siemens relays and contactors to build compact control architectures, reduce wiring complexity, and improve panel organization. Its 24 V AC coil and 2C/O + 2C/N configuration support common control schemes such as start-stop interlocks, signal conditioning, and auxiliary feedback in motor control and automation networks.