The Siemens 4EU3622-0ET00-0AA0 is a mains choke (line reactor) designed for use with variable frequency drives (VFDs). It sits between the supply and the drive input, limiting harmonic distortion and reducing voltage spikes that could damage the drive's DC bus capacitors. Rated at 250 A continuous with a maximum short-term current of 278 A, this 3-phase reactor handles the full load of a substantial motor drive — think conveyors, pumps, or compressors in the 150–200 kW range depending on duty cycle.
Operating voltage is 460 V AC at 60 Hz — this is a 460 V class reactor, common in North American 480 V systems where the nominal is 460 V. At 60 Hz the core is sized for that frequency; running it at 50 Hz would increase core saturation risk unless the voltage is derated proportionally. The 250 A rated current is the continuous thermal rating at 40 °C ambient. With thermal class H (180 °C insulation system), there is headroom for overloads, but the 294 W coil loss and 236 W iron loss (530 W total) mean this choke needs free air around it — IP00 open-frame construction with no enclosure. Flat-type terminals for the main circuit accept bus bar or large cable lugs — expect M10 or M12 bolt holes, typical for this current class. Panel builders should plan for 0.35 m width, 0.321 m height, and 0.237 m depth plus bending radius for incoming cables.
For a BOM freeze or critical-spare holding, this is a safe line item.