The Siemens 4EU3622-0EQ00-0BA0 is a three-phase mains choke (line reactor) designed for installation ahead of a frequency converter (Netzdrossel f. FU). Rated at 540 A continuous with a 600 A maximum, it handles the full current draw of a large drive on a 690 V AC line. The 320 W coil loss plus 160 W iron-core loss total 480 W of heat that has to leave the enclosure; at IP00 (open frame) the reactor relies on the cabinet's forced-air or natural convection, so don't bury it in a sealed box.
Deployment context
This is an open-frame reactor (IP00) that bolts into a panel or machine cabinet — no DIN-rail clip, no enclosure. The flat-type main-circuit terminals accept busbar or cable lugs. At 0.35 m wide, 0.321 m tall, and 0.237 m deep, it needs a clear footprint in the cabinet with airflow around the core. Thermal class H (180 °C) winding insulation gives headroom for the 40 °C ambient rating, but the total 480 W dissipation means the cabinet designer needs to account for that heat load when sizing ventilation or air conditioning.