Siemens 3TH2031-0JB4 Auxiliary Contactor

The auxiliary contactor, also known as a control contactor, contact relay, or control relay, with type number 3TH2031-0JB4 from Siemens is an electrical component for control and signaling in circuits. It has the dimensions 4 x 5 x 8 cm and weighs 0.205 kg. Auxiliary contactors are primarily used for control and signaling purposes in electrical systems. They serve for potential separation, signal forwarding, and interlocking of circuits. Typical applications are found in automation technology, mechanical engineering, and building technology, where they serve, for example, to implement interlocking circuits or as coupling elements in PLC controls.