The Siemens SIDAC 4EU2752-0AF30-4BA0 is a 3-phase output reactor (choke) rated for 66 A maximum continuous current and a switching frequency of 6400 Hz, with an inductance of 0.14 mH (140 µH). It is designed to sit between a variable-frequency drive and the motor, smoothing the voltage spikes and limiting the rate of current rise that the drive's fast-switching IGBTs produce. The 6400 Hz switching frequency matches the typical carrier frequency of many mid-range PWM drives. The 66 A rating means it can handle motor loads up to roughly 30–37 kW at 400 V, depending on the duty cycle and ambient conditions.
Open-frame IP00 component mounts inside a panel or enclosure. Flat-type terminals require busbar or flat-cable lug. Dimensions: 0.27 m wide, 0.24 m tall, 0.18 m deep. Thermal class H (180 °C insulation system) and a 40 °C ambient rating mean it can run hot without derating in a normal ventilated enclosure. The total power loss is 316 W (176 W in the coil plus 140 W in the iron core), so the enclosure must have enough airflow or forced cooling to keep the internal temperature rise within limits.