What this output reactor does
The Siemens SIDAC 4EU3652-0EH10-4BA0 is a 3-phase output reactor (output choke) rated for AC voltage, designed to sit between a variable-frequency drive and the motor. Its job is to limit the rate of voltage rise (dV/dt) and reduce reflected-wave peaks on long cable runs, which protects motor winding insulation from premature failure. Rated for a maximum continuous current of 55 A and an inductance of 0.0006 H, this reactor handles switching frequencies up to 8 kHz. It carries a Class H insulation system per IEC 60085, meaning the winding can tolerate 180 °C hot-spot temperature. That thermal margin matters when the reactor is packed into a panel with other heat sources.
The enclosure is IP00 — no protection against dust or moisture — so this reactor belongs inside a ventilated cabinet, not on the machine frame. Dimensions are 0.35 m wide by 0.32 m tall by 0.22 m deep; plan for a footprint roughly the size of a shoebox, plus clearance for airflow and the screw-type terminals on the main circuit. That is a standard, field-serviceable connection — no special crimp tooling needed.