Configured order, not a base code
The ABB ACS880-01-077A-5+B056+K475 is the configured ACS880-01 wall-mount drive with option codes +B056 and +K475 applied to the 077A frame, so the BOM line is tied to that exact string rather than the bare 077A-5 base. Input class is 3-phase 380-500 V per the listed description, so the panel feed and breaker sizing upstream are sized for that span.
Frame position in the ACS880-01 ladder
Inside the ACS880-01 family the 077A-5 frame shares its 23.13 kg mass with the 065A-5 step, while the 040A-5 comes in at 18.14 kg and the 034A-5 at 10.43 kg — a usable sanity check when a 077A-5 ships and the panel was actually built around a 065A-5 footprint.