What you're actually sourcing
The ABB ACH580-01-046A-4 sits in the ACH580-01 wall-mount variable-frequency drive family and ships under ASEA BROWN BOVERI part marking ACH580-01-046A-4, listed against the Drives / Motor Drives category. The ACH580-01 frame is the cabinet-mount / wall-mount form factor for HVAC and pump-style loads, which is the context a sourcing buyer usually carries into this order code.
The rating that drives the BOM line
The only quantitative figure on the seed ledger is the unit mass at 5.53 kgs — that puts the drive in the bracket a single technician can shoulder onto a backplate without a lifting aid, and it defines the panel-builder's handling note rather than the electrical rating. The actual current and voltage class for ACH580-01-046A-4 is carried in the drive nameplate and the datasheet, not in this spec row, so any fit decision on motor horsepower has to be made against the nameplate, not against the catalog listing.
Same-frame siblings worth weighing
Two other ACH580-01 wall-mount siblings live in the same evidence set and are the natural cross-shops if a -046A-4 slot has to be filled by substitution: ACH580-01-014A-4 and ACH580-01-023A-4, both catalogued at 6.80 kgs. The weight delta between the -046A-4 at 5.53 kgs and the -014A-4 / -023A-4 at 6.80 kgs is real but small, and unit mass is not the parameter that decides whether one of those parts drops into the slot originally specified for the other — the current step (the numeric token in the code) and the matching motor horsepower are. Treat the lighter -046A-4 as the same frame family, not as a guaranteed panel-fit alternate, and confirm the current rating against the motor nameplate before specifying.