Siemens 3RH1140-1BB40 Auxiliary Contactor

The auxiliary contactor, also known as contactor auxiliary switch, control relay, or coupling relay, with type number 3RH1140-1BB40 from Siemens is an electrical component from the category of auxiliary contactors for switching and controlling control currents in electrical circuits and systems. It has the dimensions 7 x 5 x 8 cm and a weight of 0.25 kg. Auxiliary contactors are used in automation technology, mechanical engineering, and switchgear to process signals, implement logic functions, and switch smaller loads. Typical applications include control systems of machine tools, signal processing in conveyor systems, and load control in building automation systems.