The ABB XT5LU460BUFF000XXX is a 4-pole breaking part from the XT5L 600 series, configured with front-front (F F) terminals and carrying UL/CSA+TU approvals. This is the interrupting section of a molded-case switch-disconnector — the part that actually opens and closes the circuit — not the complete device with enclosure or operating mechanism. It mounts into the XT5L 600 frame assembly within a panel or enclosure, typically on a DIN rail or backplate.
4P = four poles; F F = front-front terminals, bringing line and load connections to the front face. UL/CSA+TU confirms UL and CSA certifications plus a TU approval mark.