Siemens 48ATC3S00NS

Siem​ens 48ATC3S00NS is a three‑phase solid‑state overload relay (ESP200) from the Siemens ESP200 family, designed for motor protection in 50/60 Hz systems and rated for 3 to 12 A full‑load current in frame size A1. As a protective device for three‑phase motors, it trips when current exceeds 125% of the motor’s full‑load current, with a trip time under 3 seconds for phase loss, and it also provides a ground‑fault trip when fault current exceeds 60% of the running current, helping prevent damage from overload or leakage conditions. The relay can be mounted directly to a compatible Siemens contactor or used as a standalone protection relay, with a main‑circuit design that supports straightforward wiring and accessible auxiliary terminals for control circuits, including automatic or manual reset options. Specs and compatibility include operation up to 600 VAC and 50/60 Hz, making it suitable for standard industrial motor control panels where compact protection in a single device is required.