The Siemens 4EU4521-0AK00 is a 3-phase commutating choke for converter applications, rated for 1310 A AC at 575 V with an inductance of 24 µH. This is the line reactor that sits between the drive and the motor or between the supply and the drive — it limits current rise during commutation, reduces harmonic distortion, and protects the converter's semiconductors from di/dt stress.
The peak current rating of 1638 A gives you the short-term overload capability; a drive drawing 1310 A RMS will see peak currents approaching that during regenerative braking or fault clearing. The DC rated current of 1605.3 A applies when the choke is used on the DC link side of a converter, which is less common but supported. IP00 means no enclosure — this is a panel-mount component that needs to be inside a cabinet with its own IP rating. The flat-type terminals accept busbar or cable lugs; plan for 0.46 m width and 0.435 m height on the mounting surface, with 0.293 m depth projecting into the cabinet. The 700 W coil loss plus 404 W iron core loss means roughly 1.1 kW of heat to vent — factor that into your cabinet cooling calculation.
Deployment context
This choke is sized for large 3-phase converter systems — think 500–800 kW drives feeding pumps, conveyors, or compressors in industrial plants. The 575 V rating matches North American 600 V class systems (575 V is the standard nominal voltage for Canadian and some US industrial grids). The 50/60 Hz frequency rating means it works on either supply; the inductance value is the same at both frequencies, but the 4% voltage drop is measured at the rated frequency.