What this part is and what it does
The Siemens SIDAC 4EP3806-0EK00 is a 3-phase output reactor (also called an output choke) rated for a maximum continuous current of 26 A and a rated switching frequency of 8 000 Hz. It provides 0.33 mH of inductance per phase, sized to limit the rate of voltage rise (dV/dt) and reduce motor-bearing currents on the output of a variable-frequency drive. The 26 A rating means it can handle the full-load current of a motor up to roughly 11 kW at 400 V, depending on the drive's switching pattern and cable length.
Where it goes and how it mounts
This reactor is an open-frame (IP00) component with screw-type terminals for the main circuit connections. It measures 0.17 m wide by 0.15 m tall by 0.12 m deep, so it fits into a standard control-panel enclosure on a mounting plate — not a DIN-rail snap-on. The IP00 rating means it requires the panel's own enclosure for protection against dust and contact; it is not intended for standalone outdoor or washdown locations. The screw terminals accept lugged or ferruled cable, typical for power wiring in a drive cabinet.
Thermal class and ambient limits
The reactor is built to thermal class B. The ambient temperature rating is 40 °C.