The Siemens 4EU2452-5UA00-0AA0 is a three-phase mains choke (line reactor) designed to sit between the supply and a variable-frequency drive. It smooths current harmonics, limits inrush, and protects the drive's DC-link capacitors from line transients. Rated 500 V AC, 50 Hz, with a maximum continuous current of 63 A and a rated current of 56.7 A, it handles the full load of a 30–37 kW drive class depending on duty. The 0.58 mH inductance and 4 % relative inductive voltage drop are typical for a 4 % impedance reactor — a common choice for reducing harmonic distortion without excessive voltage sag under load.
Fit and mounting reality
Dimensions are 0.225 m wide, 0.21 m tall, and 0.147 m deep. The flat-type terminals accept busbar or cable lugs; expect to land power wiring with ring or fork terminals. Thermal class H insulation (180 °C rated) means the choke can run hot without degrading the winding varnish, but the 125 W coil loss plus 27 W iron loss (152 W total at rated load) must be vented — forced air or a properly sized enclosure is recommended if ambient hits 40 °C.