The Siemens 4EP3801-8DS00 is a 3-phase commutating choke for converters, rated for a maximum continuous current of 31.5 A and a rated operating voltage of 500 V AC at 50 Hz. It carries a rated inductance of 0.92 mH with a 4% relative inductive voltage drop at the measurement level. This is the component that sits between the converter and the line to limit di/dt and reduce harmonic distortion — without it, the converter's switching edges can cause nuisance trips upstream or shorten the life of the DC-link capacitors.
The lifecycle stage for this order code is listed as mature, meaning it is not in active phase-in or phase-out — it is a stable, established catalog item. For a BOM freeze, this is a low-risk line item; no immediate PCN or LTB is signaled. Sourcing is straightforward: quoted to order against an RFQ through independent distribution, with availability and current pricing confirmed at quote time.
Mounting dimensions are 0.178 m wide, 0.153 m high, and 0.12 m deep. The enclosure is rated IP00 — no ingress protection, so it must be mounted inside a panel or enclosure that provides the environmental seal. Connections are via screw-type terminals for the main current circuit, which is standard for panel wiring with ring or fork lugs. Thermal class B (IEC 60085) means the insulation system is rated for a maximum hot-spot temperature of 130 °C, with a 40 °C ambient as the reference point. The coil dissipates 59 W and the iron core another 14.1 W — that 73 W total needs to be considered in the panel's thermal budget.
Peak current rating is 39 A, and the DC-rated current is 38.6 A — useful if the converter's DC link is being smoothed by this choke in a non-standard topology. The rated continuous current (Ith) is 28.35 A, which is the figure to use for continuous duty under IEC 61558-2-20. If your load profile is intermittent or the ambient is below 40 °C, you may get some headroom, but the 28.35 A is the safe design number for a 50 Hz line.