What the order code is buying
The ABB ACS800-U4-0490-5+E210+P901 is the U4 cabinet-format AC drive in the ACS800 line, with the base string identifying the frame and current rating and the +E210 and +P901 suffix codes added as option selections that must be matched on any replacement.
Option-code meaning for the BOM
The +E210 and +P901 suffix codes are part of the orderable identity, so a buyer sourcing this exact slot needs to confirm both codes on the nameplate before release — the +E210 and +P901 selections ride alongside the base frame and current rating, not inside it.