What the kit contains and what it fits
The VW3A9801 is a mounting kit for the Altivar 71 drive series, designed specifically for installing the drive inside a dust and damp proof enclosure. The kit includes one thermal liner, hinged mechanical adaptors, one heatsink, and a manual. It is intended for enclosures with heat-treated epoxy paintwork (fine or medium texture), thickness from 1.5 to 3 mm, or enclosures in stainless or paint-finished smooth steel.
Lifecycle reality — obsolete, not a dead end
The manufacturer lists the VW3A9801 as obsolete.