The ABB XT4SU3250EFF000XXX is a XT4S 250 EKI moulded-case circuit breaker, rated for the 250 A frame. This is the current-production variant — lifecycle stage is marked current, meaning it's still in the active catalog and not subject to a last-time-buy notice as of the latest revision.
The description string reads ABB XT4SU3250EFF000XXX XT4S 250 EKI / ABB XT4SU3250EFF000XXX XT4S 2. The EKI suffix indicates the internal trip unit configuration (electronic, with specific protection curve and accessories).