Panel-side mounting reality
The ACS550-01-125A-4: At 20.41 kgs the unit requires a two-person lift onto the backplate and the cabinet must be sized for that mass at the mounting plane. Cabinet cutout and gland plate layout follow the standard ACS550-01 wall-mount footprint rather than a custom drill.
Series context for sourcing
Within the ACS550 family the ACS550-U1-096A-4 sits at a lower current frame at 19.96 kgs, so it shares the same general-purpose drive category but is not a same-frame drop-in — mounting footprint and output current differ by one frame size. Buyers chasing a current-platform successor can look at the ACS580-01-065A-4, which lands at 19.05 kgs in the same category.