What this reactor is and where it fits
The Siemens 4EP4010-0WS00 is a 3-phase reactor (choke) rated for 1.03 A continuous, built for AC line duty. It uses screw-type terminals for the main circuit and carries an IP00 protection class — meaning it is an open-frame component intended for installation inside a panel or enclosure that provides the environmental seal. The thermal class B insulation (130 °C continuous) and 50 °C ambient rating mean it handles moderate thermal stress without derating, typical for line-reactor applications in motor drives or power supplies where you need to limit harmonic current or smooth voltage notches.
Physical fit and integration
Mounting dimensions: 0.219 m wide by 0.179 m tall by 0.143 m deep. That depth is the critical panel clearance dimension — make sure your enclosure depth leaves room for the screw-terminal connections on the front face. The IP00 rating means no integral enclosure; plan for a gland plate or busbar entry point in the panel.