The Siemens 4EP4002-8DS00 is a three-phase commutating choke for converter applications, rated at 400 V AC and 50 Hz. It handles a maximum AC current of 91 A and a peak current of 114 A, with an inductance of 0.25 mH and a relative inductive voltage drop of 4% at rated conditions.
What the ratings mean for your converter circuit
The 0.25 mH inductance and 4% relative inductive drop are sized to limit di/dt and reduce commutation notches on the line side of a converter. The 91 A AC maximum current (81.9 A continuous AC rated) and 111.5 A DC rated current tell you the choke can handle the ripple current in a DC link or AC line reactor application. With IP00 protection, this choke is an open-frame component meant for installation inside a panel or enclosure that provides the environmental seal. The flat-type terminals accept busbar or cable lugs — plan for a bolted connection, not a plug-in. Thermal class B (130 °C rise) and the combined power loss of 104 W (80 W coil + 24 W iron core) at 40 °C ambient mean the choke needs free air movement or forced ventilation inside the panel to stay within its rating.