What this output reactor does on a drive line
The Siemens SIDAC 4EU2431-4UA00-0A is a three-phase output reactor rated for 575 V AC systems, designed to sit between a variable-frequency drive and the motor. Its 1.4 mH inductance and 3 kHz switching-frequency rating smooth the voltage edges from the drive output, reducing motor winding stress and limiting reflected-wave peaks on long cable runs. The 17.5 A maximum current (15.75 A rated continuous with a 40°C ambient) matches 5–7.5 kW motor frames at 575 V, typical for conveyor, pump, and fan applications in North American 480/575 V plants.
Thermal and mounting — what IP00 means in the cabinet
IP00 means this reactor has no enclosure — it is an open-frame component intended for installation inside a locked electrical cabinet. Total losses run 192 W (110 W coil + 82 W iron core), so forced ventilation or a derated fill factor is needed in a sealed panel. Class H insulation (180°C hot-spot rating per IEC 60085) gives headroom for sustained overload, but the 40°C ambient rating governs the continuous current limit. Free cable endings on the main circuit make wiring straightforward but require a strain-relief point on the mounting plate.