What this SKU is
The ABB ACS580-01-04A6-2 is a member of the ACS580 series general-purpose drive line, listed under the Motor Drives category and carrying the ACS580-01 frame designation in the order code. For a buyer landing on this exact order code, the first read is that it is the compact single-drive SKU within the ACS580 family, not a module or option card.
Handling and panel fit
The drive is listed at 2.09 kgs, which is the figure that governs single-person panel mounting and shipping weight for a spare on the shelf — light enough to handle without a lift aid, heavy enough to want a two-handed grip during panel insertion.