The Siemens 4EP4000-0FS00 is a three-phase commutating choke — a line reactor — designed for the DC link or input side of a converter (variable-frequency drive or rectifier). Its job is to limit current rise rates (di/dt), reduce harmonic distortion, and protect the converter's semiconductors from commutation notches and line transients. Rated for 60.8 A continuous with a maximum of 67.6 A at 50 Hz, it handles the full-load current of a drive sized in that range. Operating voltage is 400 V AC, three-phase, 50/60 Hz.
Thermal and electrical ratings — what matters for fit
Thermal class B (130 °C rise) per IEC 60085, with an ambient temperature rating of 40 °C. Total power loss splits between the coil (57 W) and the iron core (38.5 W), summing to about 95.5 W of heat that must be removed from the enclosure. That is the number to budget for in your panel thermal calculation. The DC-rated current of 82.8 A is higher than the AC figure — a reminder that the choke's saturation limit is set by the DC component in the current. If your drive's DC-link ripple current approaches that level, the inductance will begin to roll off. Termination is via flat-type connectors (flat terminal) on the main circuit — no screw-clamp or ring-lug option. Plan for a bus-bar or crimp-on flat tab interface in your wiring schedule.
Integration notes
Dimensions are 0.219 m wide × 0.179 m high × 0.143 m deep. The 143 mm depth is the critical dimension for panel depth clearance — verify your enclosure's internal depth against that figure plus any required bending radius for the flat connectors. The open-frame construction (IP00) means no integral mounting bracket or DIN-rail clip. It must be bolted directly to a panel backplate or chassis using the choke's own mounting feet. Confirm the foot pattern from the dimensional drawing before laying out your panel.