The Siemens SIDAC 4EU2552-0AU00-4CA0 is a 3-phase output reactor rated for 65 A maximum continuous current and an 8 kHz switching frequency. It carries 0.18 mH inductance per phase and is built for 400 V AC systems. Flat-type terminals handle the main power connections, and the thermal class H (IEC 60085) insulation allows a 40 °C ambient rating with the listed power losses (98.1 W coil, 78.8 W iron core) dissipated via cabinet airflow.
The 65 A maximum is the continuous current the reactor can carry without exceeding the thermal class H limit — sized for a drive output feeding a motor drawing up to that current. The 8 kHz switching frequency matches the typical IGBT carrier frequency of modern variable-frequency drives; running a lower carrier is fine, but exceeding 8 kHz risks core saturation and higher losses. The 0.18 mH inductance provides enough dv/dt smoothing and common-mode attenuation for most 400 V drive installations with cable runs up to about 100 m. The 10 % short-circuit voltage (UK) figure from the description confirms it can handle brief fault currents without immediate saturation.