Siemens 4EU3921-0BF10-0A Commutating Choke, 480A, 600V AC

The 480A maximum current and 432A rated current define the continuous thermal capacity at 50°C ambient. For a drive line feeding a 400–480V motor load, this choke sits on the line side of the converter, limiting di/dt and reducing harmonics. The 4.5% voltage drop at rated current is typical for a 3%–5% impedance line reactor — enough to mitigate nuisance tripping on weak mains but not so high it drops significant torque. Physical size: 0.41m wide × 0.385m tall × 0.229m deep. That is a substantial footprint — roughly the size of a small suitcase. Plan for a mounting plate or sub-panel; it does not snap onto a DIN rail.