Siemens 3RS1800-1HP00 Coupling Relay

Siemens 3RS1800-1HP00 Coupling Relay is a SIRIUS 3RS18 device housed in an industrial enclosure with three changeover contacts, designed to bridge low‑voltage control circuits to higher‑voltage loads while preserving isolation. The coil is rated for 24 V AC/DC, while the load side supports voltages up to 220–240 V, enabling a compact interface that couples control logic to line‑level circuits in automation gear. It uses screw‑type terminals for wiring and is described as monostable in its switching behavior, returning to its default state when the control signal is removed. This three‑pole coupling relay is well suited for applications requiring three independent switching paths in machine controls, conveyors, packaging lines, and other process‑automation tasks, helping reduce panel space and wiring complexity while providing clear separation between control and power circuits.