Reading the suffix codes on the BOM line
The string ACS800-104-0260-7+C126+E205+V991 is not a bare catalog number — the +C126, +E205, and +V991 segments are factory-installed option codes that have to be quoted together as one configured line item. Procurement should treat the full string as the orderable identity and refuse any partial-match substitution, because dropping a suffix silently changes the I/O, encoder, or marine/ATEX variant that was originally specified.
How it stacks against current-platform alternatives
The ACS550-U1-157A-4 at 89.81 kgs and the ACS580-01-180A-4 at 54.43 kgs both sit in the air-cooled general-purpose class and likewise do not match the liquid-cooled chassis envelope of the ACS800-104. Anyone holding this order code should spec the replacement on cooling architecture and current frame first, weight second.
Sourcing posture
For a planned migration off the ACS800 platform, the ACS880-01 series is the natural destination family, but only after verifying that cooling class, current frame, and the +C126 / +E205 / +V991 functional equivalents are covered on the successor order code.