The Siemens 4EU3022-0ET00-1BA0 is a three-phase mains choke (Netzdrossel f. FU) designed for the input side of a frequency converter. It smooths line current, reduces harmonics, and limits inrush — the 0.13 mH inductance at 250 A rated current with a 5% inductive voltage drop means it's sized for a 460 V AC, 60 Hz drive line pulling up to 250 A continuous, with a thermal maximum of 278 A at 60 Hz. The IP00 enclosure and flat-type terminals tell you this mounts inside a panel, not on a wall — plan for a clean gland plate and enough clearance around the 0.3 m wide, 0.269 m tall, 0.221 m deep body for airflow.
This part carries UL/CSA recognition per EN 61558-2-20, which covers the safety of chokes and reactors. That means it's accepted in North American panels without a separate evaluation. The flat-type terminals accept bus bar or large cable lugs — no DIN-rail spring cage here, so plan for a bolted connection.