The Siemens 4EU3022-4AA00-0AA0 is a three-phase commutating choke (line reactor) designed for converter front-ends. It carries a rated current of 225 A and a maximum current of 250 A at 50 Hz, with an inductance of 0.15 mH and a relative inductive voltage drop of 4% at rated conditions. The 500 V AC operating voltage suits 400 V class drives and converters where additional line impedance is needed to limit harmonic distortion and reduce peak currents.
The 225 A rated current (250 A maximum) is the continuous thermal current at 40 °C ambient — sized for a 200–250 A drive input. The 0.15 mH inductance at 50 Hz provides a 4% impedance drop, which is typical for line reactors used to attenuate harmonics and protect the DC bus from line notching. The DC-rated current of 306.3 A indicates the choke can also handle DC-side ripple current if used in a DC-link configuration, though the primary application is AC line-side commutation. Power loss is split: 220 W in the coil and 148 W in the iron core, totaling 368 W at rated load. This heat must be dissipated; the IP00 enclosure means no fan or filter — the choke relies on natural convection in a clean, dry cabinet. Thermal class H (180 °C insulation system) per IEC 60085 gives headroom for sustained overloads up to the thermal limit.
Mounts on a panel or chassis via the flat-type terminals for the main circuit — no DIN-rail clip. Dimensions are 0.3 m wide × 0.269 m high × 0.211 m deep, so it occupies roughly the footprint of a small suitcase. The IP00 rating means it is not sealed; install it inside a cabinet that keeps out dust and moisture. The flat terminals accept busbar or cable lugs, common for this current class.