The Siemens 4EP4010-0NS30 is a Netzdrossel (mains choke / line reactor) for 3-phase AC drives and power supplies. It carries a maximum continuous current of 106 A and a rated current of 95.4 A at 500 V AC, 50/60 Hz, with a rated inductance of 0.2 mH. The 2.7% relative inductive voltage drop at rated conditions means this choke provides moderate harmonic attenuation and current smoothing for a 3-phase line — sized for a drive or converter input where you need to limit di/dt and reduce reflected-wave stress on the DC bus.
The 4EP4010-0NS30 is an open-frame (IP00) component — no enclosure, no finger-safe terminals. Mounting dimensions are 0.219 m wide, 0.179 m high, 0.143 m deep. The main circuit connects via free cable endings, so plan for a junction box or terminal block within the panel. Thermal class B (130 °C winding rise per IEC 60085) and a 40 °C ambient rating; derate above that. This is not a DIN-rail snap-on part — it bolts into the cabinet floor or a sub-panel, with clearance for airflow and creepage.