What the order code covers
The ABB ACS550-U1-059A-4+K466+L502 sits in the ACS550 series of motor drives and carries the +K466 and +L502 option suffixes on the base ACS550-U1-059A-4 frame; the full string is what the BOM line and any cross-reference have to match, because changing a single suffix character changes the build sheet and the parameter set that comes preloaded at the factory. The drive weighs 31.75 kgs as listed, so the panel layout, lifting plan, and the spare on the storeroom shelf all need to plan for a single-person-lift-plus-assist install rather than a bench-handle part.
Class and panel fit
ACS550 units are wall-mount / cabinet-mount low-voltage AC drives used to run standard induction motors in industrial control panels, and the U1 frame in this code is the standard cabinet-mount format for the 59 A current class in the series. Because the unit is 31.75 kgs, the cabinet needs the rated mounting footprint clear, the lifting eye or hoist path planned for replacement, and the cooling airflow path left unobstructed on top and bottom — the same clearances the rest of the ACS550-U1 frame requires.
Sourcing posture
With no separate lifecycle entry on file, treat the supply channel as quoted-to-order against an RFQ: confirm the full +K466+L502 suffix string, the firmware revision slot, and the destination panel's existing parameter file before releasing the PO. Sister SKUs in the same ACS550-U1 frame — ACS550-U1-059A-4+B055, ACS550-U1-072A-4+B055+L512, and ACS550-U1-096A-4 — sit in the same drive family and the same panel-mount form factor, with the B055 / L512 / no-suffix options marking the differences in factory build; only the exact-suffix alternate is a true drop-in for a +K466+L502 line, the others change current class or option set and need a panel check before swapping.