The Siemens SIDAC 4EU3632-8MC08-0AA0 is a 3-phase filter reactor rated for 90.3 A continuous (100 A maximum) at 400 V AC, 50 Hz. It provides 5 % relative impedance (0.59 mH) to attenuate harmonic currents from variable-frequency drives and other non-linear loads, protecting upstream transformers and switchgear from excess heating and voltage distortion. The reactor is rated for 46 kvar of reactive power and has a resonant frequency of 224 Hz, making it suitable for typical 6-pulse drive front ends where the dominant 5th and 7th harmonics need suppression.
The 90.3 A rated current at 400 V AC means this reactor can handle a continuous load of roughly 62.5 kW on a 3-phase 400 V system (assuming typical drive efficiency and power factor). The 100 A maximum figure gives a short-term overload headroom — useful for motor starting inrush or temporary overload conditions. Thermal class H insulation (rated for 180 °C continuous) means the reactor can withstand higher internal temperatures than standard class B or F units, which matters when it's mounted in a warm cabinet or near other heat-generating components. The 424 W power loss figure at rated load needs to be factored into the enclosure's cooling calculation. The 5 % impedance is the industry-standard value for general-purpose drive input line reactors — high enough to reduce harmonic current distortion by roughly 30-40 % without causing excessive voltage drop at the drive DC bus.
Dimensions are 0.35 m wide × 0.321 m high × 0.227 m deep. This is a substantial component — roughly the size of a small suitcase — so it needs a dedicated mounting plate or chassis inside the enclosure, not a DIN rail. The IP00 open-frame construction means the core and windings are exposed.