What this choke does in the drive line
The Siemens 4EU2552-7UA00-0AA0 is a 3-phase mains choke (line reactor) sized for variable-frequency drive input circuits.
Thermal class and power dissipation
Total power loss splits between the coil (140 W) and the iron core (43 W), for 183 W dissipated at rated load. Thermal class H per IEC 60085 means the insulation system handles a 180 °C hot-spot temperature — relevant if this choke sits in a crowded cabinet where ambient already runs 40 °C. The open-frame IP00 construction means it needs enclosure-level protection; it is not a standalone device for a wet or dusty floor.
Termination and approvals
Main circuit connection uses flat-type terminals — expect bus-bar or crimp-lug termination, not a spring cage. The choke carries UL/CSA recognition per EN 61558-2-20, which covers transformers and reactors for industrial applications. That recognition matters for panel builders who need a cUL-marked component to pass a North American inspection.