The Siemens SIDAC 4EP3706-0JS00 is a 3-phase output reactor rated for 180 A maximum current and a 13 kHz switching frequency, built for AC motor-drive applications where you need to limit the rate of voltage rise and reduce bearing currents from PWM drives. It's an IP00 open-frame choke with flat-type terminals — no enclosure, so it goes inside a panel or cabinet where the environment stays clean and dry.
What the ratings mean for fit
The 180 A maximum (Ithmax) and 162 A rated current (I LN) tell you the continuous load this reactor can carry at 45 °C ambient — derate above that. The 13 kHz switching frequency matches modern IGBT drives; the 0.003 mH inductance and 2 % impedance (Uk) are sized to limit dv/dt without dropping too much voltage across the reactor. Thermal class F insulation (155 °C hot-spot) means it can handle the heat from the 48.6 W coil loss plus 26.9 W core loss without cooking the winding. The flat-type terminals take a bus bar or large lug — not a screw-clamp for fine wire. Plan your panel connection accordingly.
Deployment context
Because it's IP00, this reactor lives inside a cabinet — not on the motor or out in the weather. Mount it between the drive output and the motor cable, close to the drive, to keep reflected wave spikes off the motor windings. The 0.17 m width and 0.15 m height fit a standard sub-panel footprint; depth is 0.1 m.