The Siemens SIDAC 4EP3706-0ES01 is a 3-phase output reactor rated for AC voltage up to 500 V, with a rated frequency of 4 kHz and an operating range from 0 Hz to 8 kHz. This output choke is designed to limit voltage spikes and reduce harmonic distortion on the output of variable frequency drives, protecting motor windings and extending cable runs.
Rated inductance of 0.0032 H (3.2 mH) at a rated current of 3.6 A (I LN) defines the impedance this reactor presents at the switching frequency. The 4 kHz rated frequency matches the typical switching frequency of many modern IGBT-based drives; if your drive operates at a different carrier frequency, check the impedance curve — performance changes with frequency. The 5.5 % voltage drop (UK) at rated current tells you the series voltage loss, which must be factored into the motor terminal voltage budget. Power dissipation splits between the coil (10.7 W) and the iron core (25 W), totaling roughly 35.7 W of heat to manage inside the enclosure. Thermal class F insulation (IEC 60085) means the winding can handle a 155 °C hot-spot temperature, with a 40 °C ambient rating as the reference point. Ensure adequate airflow or cabinet volume to keep the temperature rise within limits.
Dimensions are 0.17 m width, 0.15 m height, and 0.1 m depth — a compact footprint for a 3-phase reactor at this power level. The IP00 protection class means it must be mounted inside an enclosure with at least IP2X (finger-safe) protection; plan for separation from live busbars during panel layout.