The Siemens 4EU3622-5BA00-0AA0 is a three-phase commutating choke designed for converter applications, rated at 225 A continuous with a maximum of 250 A at 750 V AC, 50/60 Hz. It delivers 0.22 mH inductance per phase with a 4% relative inductive voltage drop at rated conditions — this drop is the key parameter for sizing: it defines the voltage margin the converter's DC link must absorb during commutation. The choke is wound for thermal class H (180 °C) per IEC 60085, with a combined copper and iron loss of 520 W at 40 °C ambient, so forced ventilation or generous cabinet spacing is required — IP00 means no enclosure protection, so it must live inside a panel or cabinet.
At 0.35 m wide, 0.321 m tall, and 0.227 m deep, the choke occupies a substantial footprint — it is not a DIN-rail component. The flat-type terminals for the main circuit accept lug or busbar connections; plan for at least 100 mm clearance above and below for cable bending radius and airflow. The 520 W total heat dissipation at full load means the surrounding cabinet temperature rise must be calculated into the panel cooling budget; a 40 °C ambient rating is the baseline, and derating applies above that.
The part is designed to EN 61558, the safety standard for power transformers, reactors, and similar inductive components. This compliance covers isolation, thermal, and short-circuit requirements for industrial installations. The choke is a commutating (line-side) reactor — it sits between the AC supply and the converter's input rectifier, smoothing commutation notches and limiting di/dt. Do not confuse it with a DC-link or motor-side choke; the 4% voltage drop and 0.22 mH are tuned for the AC line side of a 3-phase converter.