SIEMENS 3UB8123-4CW2 Solid state overload relay

The SIEMENS 3UB8123-4CW2 is a motor protection relay with integrated thermal-electronic overload monitoring, designed for 3-phase motors up to 25A (AC-3/400V), featuring adjustable tripping classes (10, 20, 30), phase loss/imbalance detection, and manual/automatic reset options, housed in a compact 45mm DIN rail-mountable enclosure for reliable motor protection against overloads, overcurrents, and phase failures in industrial automation systems.