The Siemens SIDAC 4EP4010-0JS00 is a 3-phase output reactor (choke) rated for a maximum current of 49A and a switching frequency of 8000 Hz. It is designed to sit between a variable-frequency drive and the motor, smoothing the PWM waveform and limiting the rate of voltage rise (dV/dt) to protect motor winding insulation on long cable runs.
The 8000 Hz switching frequency rating means this reactor is matched to IGBT-based drives that switch at 8 kHz — common for general-purpose VFDs in the 5–50 kW range. The 49A maximum current (ITHMAX) sets the continuous thermal limit; at 40 °C ambient, the reactor dissipates 85 W in the coil plus 55 W in the iron core (140 W total), so panel ventilation must handle that heat load. Thermal class B (130 °C insulation system) per IEC 60085 gives the winding a 25 °C margin above the 105 °C class A minimum, which adds reliability in enclosed cabinets. The IP00 protection class means the reactor has no enclosure — it is an open-frame component intended for installation inside a grounded metal cabinet where personnel cannot contact live parts. The screw/flat-type terminals accept ring or fork lugs for the main power connections; plan for a 0.14 m depth, 0.21 m width, and 0.17 m height footprint when laying out the subpanel.