The Siemens 4EU3022-0BA00-0AA0 is a 3-phase commutating choke for converter applications — the line reactor that sits between the drive and the mains, smoothing current ripple and limiting fault current rise rates. It's rated 225 A continuous (250 A maximum) at 690 V AC, with an inductance of 0.19 mH and a relative inductive voltage drop of 4% at rated frequency (50/60 Hz). Thermal class H insulation (IEC 60085) handles the 210 W coil loss plus 148 W iron core loss at a 40 °C ambient.
The 225 A rated current (250 A max) is the continuous thermal rating at 40 °C ambient — this choke can carry that current indefinitely without exceeding class H temperature rise. The DC-rated value of 306.3 A tells you it has additional headroom for DC-link applications or when the converter operates with a DC component. The 4% voltage drop at rated current is the impedance that limits harmonic currents and protects the drive's input rectifier; it's a standard value for line reactors in industrial drives. The 0.19 mH inductance at 50/60 Hz defines the filtering characteristic — higher inductance gives more smoothing but also more voltage drop under load.
The flat-type terminals accept busbar or cable lugs; plan for the physical footprint: 0.3 m wide, 0.269 m tall, 0.211 m deep. The 210 W coil loss plus 148 W iron loss means 358 W total heat to vent out of the enclosure — factor that into your cabinet cooling calculation. Thermal class H (180 °C) gives margin, but the 40 °C ambient rating is the design point; above that, derate per IEC 60085 guidelines.