What the ratings mean for your line
The Siemens 4EP4010-0LS20 is a 3-phase mains choke (Netzdrossel) rated for 500 V AC line voltage, with a maximum continuous current of 80 A and a rated current of 72 A. The 0.26 mH inductance and 3 % relative inductive voltage drop at rated current are sized to smooth line-side harmonics and limit inrush for drives or rectifiers drawing up to 72 A steady-state. The thermal class B (130 °C insulation) and 40 °C ambient rating mean this choke can live in a closed panel without forced cooling as long as the surrounding air stays under 40 °C — above that, derate the current or add ventilation.
Where it goes
This choke is an open-frame (IP00) device — no enclosure, no touch protection. It mounts inside a panel or cabinet, with screw-type terminals for the main circuit wiring. The 0.143 m depth, 0.219 m width, and 0.179 m height footprint fits standard backplate layouts; plan for clearance around the terminals and airflow paths. Because it is IP00, the panel itself must provide the environmental seal and keep live parts inaccessible.