What this choke delivers on a high-current converter line
The Siemens 4EU4521-0AP00 is a three-phase commutating choke (Kommutierungsdrossel) for converter applications, rated for a continuous 1,310 A at 690 V AC, 50/60 Hz. That 1,310 A is the thermal maximum — it's the sustained current the choke can carry without exceeding the Class H (180 °C) insulation system's thermal limit at 40 °C ambient. Peak current capability reaches 1,638 A, which handles the inrush and commutation spikes typical of large thyristor or IGBT converters on motor drives or rectifier banks. The 700 W copper loss and 400 W iron loss (1.1 kW total) are the thermal load the panel ventilation must shed; at IP00, the choke relies on the enclosure's airflow, not its own sealed cooling.
Integration and wiring — flat-terminal, open-frame
Main circuit connections are flat-type terminals (Flachanschluss) — expect bus-bar or large-lug cable lugs, not DIN-rail spring clamps. The open-frame IP00 design means the choke must be mounted inside a cabinet that provides the IP rating; plan for adequate clearance around the 0.435 m height, 0.46 m width, and 0.293 m depth to allow airflow and bus-bar routing. At 1.1 kW dissipation, forced ventilation or a derated ambient is likely needed above 40 °C.