What it is on the BOM line
The ABB ACS880-01-021A-5+K473 is a wall-mount ACS880-series drive sized at the 021A frame and tagged with the +K473 option code, which is what differentiates it from the base ACS880-01-021A-5 SKU on the same current rating. It sits in the Motor Drives segment under the Drives category, so the panel-side interface — line in, motor out, control terminals — is the standard ACS880-01 wall-mount footprint.
The one rating on the page and what it does for the installer
Listed weight is 9.98 kgs, which puts it firmly in two-person-lift territory for the wall-mount frame and is the figure the panel builder uses when checking hinge loading and cabinet reinforcement on a retrofit.
Same frame, different option code — the +K473 question
That is a procurement-relevant delta: a panel specified around the base 021A-5 needs to be rechecked for clearance and hinge load before the +K473 variant drops in, even though the current rating and footprint class are unchanged.