The Siemens 4EU3652-5UB00-0AA0 is a three-phase mains choke (line reactor) sized for the input of a variable-frequency drive. It handles 315 A maximum continuous current and is rated at 283.5 A at 50 Hz and 500 V AC, with an inductance of 0.12 mH and a relative voltage drop of 4% at rated conditions. That 4% drop is typical for a drive input choke — enough to smooth the line-side harmonics and limit di/dt without pulling the DC bus down too far. Thermal class H (180 °C rated insulation) gives headroom for the 300 W coil loss and 135 W iron core loss at full load; the 40 °C ambient rating is the design point, and you can push the current if you stay within the thermal class limits.
What's in the box and where it goes
The choke measures 0.35 m wide by 0.321 m tall by 0.237 m deep — a substantial block, roughly the size of a small suitcase. Connections are flat-type terminals (bus-bar style) on the main current circuit, so plan for lug or bar terminations, not ring tongues. It's a three-phase device; wire it in series with the drive input lines, upstream of the rectifier. Mount it on a flat panel or chassis inside the enclosure — no DIN-rail clip, so budget for bolting or bracket work.