What this output reactor does for a VFD line
The Siemens SIDAC 4EP4010-0DS00 is a 3-phase output reactor (choke) rated for 42 A maximum continuous current and an 8000 Hz switching frequency, with an inductance of 0.12 mH per phase. It sits between the variable-frequency drive output and the motor cable to limit the rate of voltage rise (dV/dt) and reduce reflected-wave peaks that can damage motor winding insulation on long cable runs. The 42 A current rating means it carries motor loads up to roughly 22 kW at 400 V (assuming typical service factor); the 8000 Hz switching-frequency rating matches modern IGBT drives that switch at 4–8 kHz. IP00 means it is an open-frame component — no enclosure protection. It mounts inside a control panel or drive cabinet, not in a washdown or outdoor location. The screw-type terminals accept standard power conductors; plan for panel space of 0.21 m wide × 0.17 m tall × 0.14 m deep.
Thermal and loss profile for panel integration
Total power loss is 108.4 W at rated load (65.2 W coil loss plus 43.2 W iron core loss) at a 40 °C ambient. That heat must be vented or conducted out of the enclosure — a 108 W continuous heat source in a sealed cabinet will raise internal temperature noticeably. Class B insulation (130 °C max hot-spot) per IEC 60085 gives a standard thermal margin for motor-circuit duty.