The Siemens 4EP4002-0DS00 is a 3-phase commutating choke (line reactor) for converter applications, rated at 50.4 A continuous with a maximum current of 56 A at 50 Hz. It operates at 500 V AC and carries an inductance of 0.65 mH. The 4% relative inductive voltage drop at rated current is the key parameter for sizing — it limits the rate of current rise in the converter's rectifier, protecting the diodes and smoothing the DC bus. This is a panel-mount component with IP00 protection, so it needs to live inside a cabinet or enclosure.
Dimensions: 0.219 m wide, 0.179 m tall, 0.143 m deep. Flat-type terminals for main circuit. IP00 requires enclosure. Thermal class B insulation.
DC-rated current is 68.6 A. Complies with EN 61558-2-20.