The Siemens 4EU2522-7BA00-0AA0 is a three-phase commutating choke for converter applications, rated for 500 V AC operating voltage and 50 Hz. It handles a maximum AC current of 112 A and a rated operational AC current of 100.8 A, with a peak current capability of 140 A. The inductance is 0.26 mH with a relative inductive voltage drop of 4% at rated current, voltage, and frequency. This choke limits the rate of current rise (di/dt) in the converter's switching devices, reducing stress on diodes and IGBTs during commutation. The 4% voltage drop figure tells you the impedance at line frequency — a standard design target for commutating chokes in this class.
The 100.8 A operational AC current (ILN) is the rated continuous current at which the 4% voltage drop is specified. For DC applications, the rated DC current is 137.2 A. Total power loss is 187 W (135 W in the coil plus 52 W in the iron core). Dimensions are 0.225 m wide, 0.21 m tall, and 0.16 m deep. The flat-type terminals accept busbar or cable lug connections — plan for a bolted interface, not a spring-cage or screw-clamp. Verify the terminal center spacing against your busbar layout before committing the panel drill plan.