The Siemens 4EU3652-8UB00-0AA0 is a three-phase mains choke (Netzdrossel f. FU) designed for installation ahead of a frequency converter. It limits harmonic currents and reduces line-side distortion, protecting both the drive and upstream equipment. Rated for 690 V AC at 50 Hz, it carries a maximum continuous current of 224 A and a rated current of 201.6 A, with an inductance of 0.23 mH and a relative inductive voltage drop of 4% at rated conditions.
The 224 A maximum current and 201.6 A rated current define the thermal limit under continuous operation at 40 °C ambient. The 4% voltage drop is the impedance at rated current — a standard value for line reactors that provides effective harmonic attenuation without excessive voltage sag. The 0.23 mH inductance is the actual winding value; paired with the 690 V AC rating, this choke is sized for medium-voltage drive inputs or high-line 480 V systems where the extra headroom is needed. Thermal class H (180 °C) insulation means the winding can tolerate sustained overloads better than class B or F designs — relevant if the drive cycles near the rated current repeatedly.
The flat-type terminals accept busbar or large cable lugs; plan for a 0.35 m width, 0.321 m height, and 0.237 m depth footprint. Total power loss is 300 W coil plus 138 W iron core, so forced ventilation or generous cabinet volume is needed to keep ambient below the 40 °C rating.