What the order code covers
The ABB ACS880-01-04A8-5+B056 is a wall-mount member of the ACS880-01 industrial drive family, built for three-phase 380-500 V input, listed at 5.90 kgs, and the frame size sits below the ACS880-01-07A6-5.
Where it sits in the ACS880-01 frame ladder
The two steps further down the family, ACS880-01-11A0-5 at 4.54 kgs and ACS880-01-07A6-5 at 6.35 kgs, bracket this part in mass but not in current class; framing choices around the drive, not raw rating differences, drive the swap question.
At 5.90 kgs the unit is a one-person lift onto a prepared DIN-rail or backplate and the cabinet does not need reinforced bracing, which keeps the panel layout simple when the spare is being staged into an existing MCC cubicle. The 380-500 V three-phase input class places it on the standard industrial low-voltage bus — the line reactor, line filter, and braking chopper options all live in the ACS880-01 accessory ecosystem and inherit the same cabinet footprint pattern.
Sourcing posture and BOM closure
For line-down replacement the practical move is to quote the part against an RFQ keyed to ACS880-01-04A8-5+B056 with the +B056 option preserved; that keeps the firmware build, encoder option, and panel seal variant matching whatever the running machine was commissioned with, and avoids a mid-fault swap that fights the drive's parameter set.