Siemens 3TH2022-0AC2 Contactor Relay

Siemens 3TH2022-0AC2 Contactor Relay is a Sirius 3TH2 auxiliary contact block with a 24 V AC coil, engineered to expand control circuitry in industrial automation. It provides four auxiliary contacts: two normally open (NO) and two normally closed (NC), all wired through screw terminals for secure field connections. The coil operates at 24 V AC with a 50/60 Hz frequency, and the device is specified under EN 50011 with the 22E designation, aligning with Siemens control systems and other standard 24 V AC control networks. Use cases include implementing interlocks, feedback signals, and logic in motor control, PLC-driven panels, signaling, and safety circuits, without routing power through the main load contacts. As part of the Sirius 3TH2 family, it is designed to accompany main contactors in control cabinets, enabling compact, modular control architectures and straightforward integration with Siemens automation hardware. Typical applications span conveyors, pumps, fans, presses, and other automated equipment where reliable auxiliary signaling and control are required in a compact form factor.