Rating language and what it constrains
The ACS800-U4-0170-5: The only quantified figure on this code is the 45.36 kg cabinet weight, which sets the install reality: lifting gear on site, cabinet reinforcement in the floor-stand, and a two-person handling plan for any swap during a line-down event. Current, voltage, and overload duty are not stated on this listing — a panel builder reading the part alone cannot size branch protection or cable cross-section from it, and the rated maximums must come from the ABB datasheet, not from the catalog line.
Where this part sits next to its frame-class peers
The ledger lists three same-function peers — the ACS880-01-156A-5 at 55.00 kg, the ACS580-01-180A-4 at 54.43 kg, and the ACS880-01-065A-5 at 23.13 kg — which bracket the ACS800-U4-0170-5 on frame size and chassis mass but do not make any of them a confirmed drop-in cross-reference. The ACS880-01-156A-5 is the closest in the next-generation ACS880 family; the ACS580-01-180A-4 is a step into the ACS580 general-purpose range; the ACS880-01-065A-5 is a smaller-frame ACS880. None of the three are quoted as a substitute, and a panel specified around any of them is not a guaranteed mechanical or control-connector match for the ACS800-U4-0170-5 without a verified cross-reference.