The Siemens 4EU2552-2UA00-0AA0 is a three-phase mains choke (line reactor) designed for installation between the supply and a variable frequency drive (VFD). It smooths line current, limits harmonic distortion, and reduces voltage spikes that can damage drive input stages.
160 A max continuous at 40 °C ambient. 144 A rated operational current for 2% voltage drop. Thermal class H. 140 W coil loss plus 38 W iron core loss.
Mounting and Termination
The flat-type terminals accept bus bar or large-gauge ring lugs; plan for a torque tool that can reach them. Dimensions: 0.225 m wide, 0.21 m tall, 0.176 m deep. Leave clearance around the core for airflow and magnetic field — don't nestle it against steel panel walls or other ferrous components.