What this reactor does on a drive line
The Siemens SIDAC 4EP4000-1TS00 is a 3-phase output reactor rated for 38 A maximum continuous current and 0.22 mH inductance, built to sit between a variable-frequency drive and the motor. Its job is to limit the rate of voltage rise (dV/dt) from the drive's PWM output and reduce reflected-wave peaks that can damage motor insulation on long cable runs. The 4920 Hz rated switching frequency matches the carrier frequency of many modern drives, so it filters the harmonics the drive generates without saturating the core. Thermal class B winding insulation (130 °C rise) keeps it safe in a 40 °C ambient — typical for an unventilated cabinet section. IP00 means it's open-frame; mount it inside a panel or enclosure that provides the physical protection.
Integration notes
Dimensions are 0.21 m wide × 0.17 m tall × 0.14 m deep — a compact block for a 38 A reactor. No DIN-rail clip; it bolts directly to the panel backplate. The 65.2 W coil loss plus 43.2 W iron loss total about 108 W heat dissipation at full load — factor that into your cabinet thermal budget. Mount it close to the drive output to minimize the unfiltered cable length between drive and reactor.