The Schneider Electric VW3SKLN006H010E is a single-phase line choke from the Altivar accessory range, rated 6 A continuous with 10 mH inductance. It sits between the mains supply and a variable-speed drive input to knock down current harmonics — common on single-phase 230 VAC feeds feeding small drives on pumps, conveyors, or fans in panel builds. Rated for 6 A, this choke matches the input side of an Altivar drive pulling up to that current. The 10 mH inductance value is sized to keep the total harmonic distortion (THD) within acceptable limits for the drive's rectifier stage — not a full sine-wave filter, but enough to keep the line from getting hammered by switching harmonics.
The 6 A rated current is the continuous RMS current the choke can carry without saturating the core or exceeding its temperature rise. Match it to the drive's input current rating at full load — if the drive draws 6 A or less at its rated output, this choke is sized correctly. Going undersized on current means the choke saturates and loses its inductive impedance, which defeats the harmonic reduction and can overheat the winding. The 10 mH inductance value determines the impedance at the line frequency. At 50 Hz, the inductive reactance is about 3.14 Ω; at 60 Hz, about 3.77 Ω. That impedance limits the rate of current rise through the drive's rectifier diodes, spreading the conduction angle and lowering the harmonic content. A lower inductance would let more harmonics through; a higher one would drop more voltage across the choke at full load.