Siemens 3UG4622-1AA30 Digital Monitoring Relay

Siemens 3UG4622-1AA30 Digital Monitoring Relay is a single‑phase current monitoring device in the SIRIUS family that provides a digital setting and a changeover output for protective and control circuits. The module is 22.5 mm wide for DIN‑rail mounting and operates from 24 V AC/DC (50–60 Hz), with a current sensing range of 0.05–10 A (AC/DC) and ON‑delay/noise pulse delay of 0.1–20 s; it also offers a hysteresis of 0.01–5 A. Output is a single changeover contact (SPDT) with optional fault buffer and screw terminals, and the contact rating is listed at 15 A. Siemens lists 3UG5642-1CW30 as the preferred successor for this digital monitoring relay.