What it is and what it does
The Siemens 4EP4010-0NS00 is a three-phase mains choke (Netzdrossel) rated for 500 V AC, 106 A maximum continuous current, with a rated inductance of 0.24 mH. It operates at 50/60 Hz and is designed to smooth line-side harmonics, limit inrush current, and protect downstream drives or converters from grid disturbances. The IP00 enclosure means it's an open-frame component intended for installation inside a panel or cabinet — no washdown or outdoor duty here.
Key ratings and what they mean for fit
The 106 A maximum current (with a rated value of 95.4 A) sets the continuous ampacity — size your upstream breaker and downstream load to stay within this limit. The 0.24 mH inductance, combined with a 2.7% relative inductive voltage drop at rated current, tells you the choke will drop about 13.5 V at 500 V under full load; factor that into your drive input voltage budget. Power loss splits into 50 W in the coil and 31 W in the iron core, totalling 81 W of heat to vent inside the enclosure. Thermal class B (130 °C winding rise) per IEC 60085, with a 40 °C ambient rating — if your cabinet ambient runs hotter, derate accordingly.
Mounting and connections
Screw-type terminals for the main circuit — no special tooling needed. Dimensions: 0.219 m wide, 0.179 m tall, 0.143 m deep. It's a panel-mount component, not DIN-rail snap-on; plan for dedicated mounting feet or a subplate.