What this choke is and where it lands
The Siemens 4EP3800-8DS00 is a 3-phase commutating choke (also called a converter line reactor) rated for 400V AC at 50Hz, with a continuous rated current of 63.9A and a maximum current of 71A at the same frequency. It is designed to sit between a converter (VFD or DC drive) and the AC line to limit di/dt, reduce harmonics, and protect the converter's input rectifier from line notching and commutation notches. The 0.2mH inductance (0.0002H) with a 2% relative inductive voltage drop at rated current is sized for typical 400V-class industrial drives in the 30–45 kW range on a 3-phase supply.
Key ratings and what they mean for fit
The 63.9A rated current (AC) is the continuous thermal limit at 40°C ambient with thermal class B insulation per IEC 60085 — meaning the winding hot-spot temperature stays within 130°C class limits under that load. At DC the same choke carries 87A, which matters if it is used on the DC bus side of a 6-pulse rectifier. The 71A maximum figure is the overload ceiling at 50Hz; sustained operation above 63.9A will exceed the 59W coil loss plus 18.5W iron core loss budget, and the temperature rise will push past the class B limit. The IP00 protection class means the choke has no enclosure — it is an open-core, open-winding assembly intended for mounting inside a cabinet or panel that provides its own IP rating. The flat-type terminals for the main circuit accept bus-bar or cable-lug connections, not spring-cage or screw-clamp wire terminations. Plan for a bolted connection with appropriate lug width matching the terminal flat.
Physical footprint and panel integration
The choke measures 0.178m wide, 0.153m high, and 0.12m deep. That is about 178 mm × 153 mm × 120 mm — a compact footprint for a 63.9A 3-phase line reactor. It mounts on a flat panel surface via its core clamping brackets; there is no DIN-rail clip, so plan for four mounting bolts into a backplate or chassis. The 0.12m depth (120 mm) is the dimension from the mounting surface to the farthest winding overhang, so allow clearance for the flat terminals and any bus-bar bends in front of the choke.
Lifecycle and sourcing posture
Lifecycle stage is mature. No successor listed. Sourced to order; confirm availability and pricing via RFQ.