The Siemens 4EU3022-1EA00-0AA0 is a three-phase commutating choke — a line reactor — sized for converter input or DC-link circuits. It carries 100 A continuous at 690 V AC, 50 Hz, with an inductance of 0.16 mH and a relative inductive voltage drop of 1.25 % at rated current. That 1.25 % figure tells you the choke is designed to limit di/dt and smooth commutation notches without dropping excessive voltage under load; it's a moderate-impedance reactor, not a heavy harmonic filter. The 0.211 m depth, 0.3 m width, and 0.269 m height footprint means this is a panel-mount component, not a DIN-rail snap-in. Open-frame IP00 construction — no enclosure, so it needs to live inside a cabinet with at least basic finger-safety protection from the installer. Flat-type terminals for the main circuit; expect busbar or cable-lug connections, not spring-cage.
Thermal and duty-cycle reality
Total power loss breaks down as 220 W in the coil plus 5.5 W in the iron core — 225.5 W to vent inside the enclosure. That's not trivial; a panel with this choke needs forced ventilation or generous natural convection volume, especially if other heat sources share the cabinet. Class H insulation (180 °C thermal class per IEC 60085) gives headroom for sustained overloads or elevated ambient conditions up to 40 °C rated ambient. The DC-rated current of 122.5 A exceeds the AC-50 Hz rating, which is typical for a choke where DC saturation margin is higher. If you're using this in a DC-link position, that's the number to size by.