The VW3SKLN013H003 is a 3-phase line choke from the Schneider Altivar range, rated 13 A with 3 mH inductance, designed to reduce current harmonics on the input side of a variable speed drive. It operates on 50-60 Hz mains and is intended for panel-mounted installation between the supply and the drive's rectifier stage.
The 13 A rated current sets the maximum continuous drive input current the choke can handle without saturating or overheating — size it for the drive's line-side draw, not the motor's full-load amps. The 3 mH inductance value determines the attenuation knee: higher inductance shifts the harmonic filter corner lower, but also increases voltage drop and physical size. At 50-60 Hz, this choke presents roughly 0.94 Ω of inductive reactance per phase, which drops about 12 V at 13 A — factor that into the drive's DC bus voltage budget.
Deployment context
Mounts in the drive cabinet between the line supply and the Altivar drive input. The 3-phase design means it connects to all three line conductors; no neutral path. Panel builders should allow clearance around the choke for heat dissipation — line chokes run warm under continuous load.