The Siemens SIDAC 4EP4006-0DS00 is a 3-phase output reactor rated for 35 A maximum continuous current and a 2 kHz switching frequency. It's built to sit between a variable-frequency drive and the motor leads, smoothing out the voltage spikes and limiting the rate of current rise that can cook a winding over time.
The 35 A current rating is the thermal limit at 40 °C ambient — push past that and the core saturates, inductance drops, and you lose the filtering effect. The 2 kHz switching frequency matches the carrier frequency of most modern IGBT drives; if your drive runs a higher PWM rate, this reactor won't filter as effectively. Inductance is 0.4 mH, which gives about a 2% voltage drop at rated current — enough to limit di/dt without starving the motor of torque. IP00 means no enclosure — this is a panel-mount component that needs a cabinet with its own ingress protection. The screw-type terminals accept standard ring or fork lugs; no special crimp tool required.
Integration notes
Mounting dimensions: 0.21 m wide, 0.17 m tall, 0.14 m deep. That's roughly 8.3 x 6.7 x 5.5 inches — plan the DIN rail or baseplate layout accordingly. The 45 W coil loss and 38 W iron-core loss add up to 83 W of heat to vent; don't bury it in a sealed corner of the panel without airflow. Thermal class B per IEC 60085 means the insulation system handles a 130 °C hot-spot temperature. The 40 °C ambient rating is the starting point; derate current if your cabinet runs hotter.