What the dv/dt rating means for your drive installation
The VW3A5106 is a motor choke designed for Altivar variable-speed drives, acting as a dv/dt output filter to protect motor windings from voltage spikes caused by fast-switching IGBTs. Its dv/dt rating steps with the line voltage: 500 V/µs max at 400 V, 750 V/µs max at 500 V, and 1000 V/µs max at 690 V — so the higher your DC bus, the steeper the edge it can round off. Rated at 481 A continuous, it sits on the output side of drives feeding motors up to roughly 250–400 kW depending on voltage class. Maximum motor cable length is also voltage- and shielding-dependent: at 380–480 V you can run 250 m of shielded cable or 300 m unshielded for a 160–220 kW motor; at 500–690 V the shielded limit drops to 150 m for the same power band. That cable-length ceiling is a real constraint if you are retrofitting into a long-run installation — exceeding it risks reflected-wave damage to the motor, even with the choke in place.
Thermal and mounting considerations
The choke dissipates 530 W under full load — that heat has to go somewhere. Ambient operating range is -10 to 50 °C, storage -25 to 70 °C. Electrical connection uses a tag connector with 2 x M12 studs — expect to land heavy cable lugs there. The unit is sized for a maximum drive output frequency of 100 Hz, which covers standard induction motors and most high-speed spindle applications below that ceiling. If your drive runs above 100 Hz, the choke will saturate and lose its filtering effect — verify your drive's max frequency against this limit before specifying.