Siemens 3UB8123-4EW2 ESP200 solid-state overload relay provides motor protection for three‑phase motors, with a current setting range of 10 to 40 A and size designation A1. As part of the ESP200 family (catalog ESP200, no. 48ATE3S00), it delivers adjustable overload protection for industrial applications. It offers both manual and automatic reset options and supports direct mounting or standalone main‑circuit operation. Auxiliary circuit connections are made via screw terminals.
