Siemens 48ATB3S00 ESP200 Electronic Overload Relay

Siemens ESP200 electronic overload relay, catalog number 48ATB3S00, is a solid‑state motor protection device for 3‑phase systems, configured with the 3UB8113‑4BB2 part designation. It protects small to medium motors by monitoring per‑phase current in the 0.75–3.4 A range (Size A) and supports main circuits rated up to 600 VAC. The ESP200 family offers configurable trip classes from 5 to 30, enabling tailored protection for different motors and startup conditions. Mounting is versatile: it can be mounted directly to a compatible motor starter or on a backplate, and the main and auxiliary circuits use screw terminals for straightforward wiring. Reset options are flexible, with hand/manual, automatic, and remote reset modes to suit different control schemes. This model is UL/cUL/CSA‑certified and designed for DIN rail or panel mounting within industrial control panels, making it a drop‑in protective element in Siemens motor‑control architectures.