Siemens 3TH20 22-0BB4 Control Relay

The control relay, also known as auxiliary contactor, auxiliary relay or switching relay, with type number 3TH20 22-0BB4 from Siemens is an electrical relay for controlling and switching currents in control circuits. It has the dimensions 7 x 3 x 3 cm and weighs 0.2 kg. Control relays are used in automation technology to process signals, perform logic functions, and switch electrical loads in control circuits. Typical applications include machine controls, process control systems, and building automation systems, where they ensure the reliable function of plant components.