The Siemens 4EU3022-2CA00-0AA0 is a commutating choke (also called a line reactor or converter choke) designed for 3-phase AC converter applications. Its job is to limit current rise rates, reduce harmonic distortion, and protect the converter's semiconductors from commutation notches and voltage spikes on the line side. Rated at 225 A continuous with a maximum of 250 A, it handles a peak current of 313 A — the latter being the value that governs short-duration overloads during motor starting or load transients. The 0.18 mH inductance and 4% relative inductive voltage drop are sized for typical 50/60 Hz line frequencies, meaning the choke presents the right impedance to smooth commutation without excessive voltage drop under load. Operating voltage is 750 V AC across the three phases, and the choke is rated for a 40 °C ambient. The thermal class H insulation (per IEC 60085) means the winding can tolerate a 180 °C hot-spot temperature — important for installations where the choke shares an enclosure with heat-producing drives or is mounted in a warm cabinet.
Sizing and Deployment Context
This choke is an open-frame design with IP00 protection — no enclosure, no drip shield. The flat-type terminals accept busbar or cable lugs; plan for a bolted connection rather than a spring-clamp or screw-cage terminal. Physical footprint: 0.3 m wide, 0.269 m tall, 0.211 m deep. The depth dimension is critical for cabinet clearance planning. Total power loss is 370 W (240 W in the coil plus 130 W in the iron core). That heat must be evacuated from the enclosure; a 370 W continuous heat source in a sealed cabinet will raise internal temperature by 15–25 °C depending on cabinet size and ventilation. Factor this into the thermal design of the panel.
The choke is designed and tested to EN 61558-2-20, the standard for separating transformers and power supply units incorporating reactors. That standard covers dielectric strength, thermal performance, and short-circuit behavior. The manufacturer's declaration of conformity (CE) is available; RoHS and REACH compliance documentation can be provided with the shipment.