The Siemens 4EU3622-2AA00-0AA0 is a three-phase commutating choke (line reactor) for converter applications — it sits between the supply and the drive input to limit current rise rates, reduce harmonics, and protect the converter's diodes from commutation notches. The 0.042 mH inductivity with a 4 % relative inductive voltage drop (cites:,) is sized for high-power drives where the line-side impedance needs a controlled bump without excessive voltage drop under load.
The 630 A maximum and 567 A rated current tell you this choke is built for a 400 V drive in the 315–400 kW range, depending on the drive's input current draw. The DC rated value of 772 A (cites:) confirms it can also sit on the DC link of a regenerative or multi-drive common-bus system — useful if you're retrofitting a line-side reactor into an existing DC bus. The 280 W coil loss plus 187 W iron-core loss (cites:,) means about 467 W total heat to vent inside the enclosure; that's not trivial in a sealed panel, so plan for forced airflow or a larger cabinet. Thermal class H (cites:) means the insulation can handle 180 °C hot-spot temperature — it's built for sustained high-current operation without cooking the windings.