The ABB 1SDA068181R1 is a breaking part — the main circuit breaker unit — in the XT4L 250 series, rated for continuous current Iu 250 A and 4-pole configuration (F F terminals). It's the core component for a molded case circuit breaker designed for distribution and motor protection in industrial panels.
Size XT4 defines the physical frame: busbar centers, mounting hole pattern, and accessory footprint (e.g., shunt trips, auxiliary contacts) are all XT4-family specific. If you're replacing an existing unit, verify the panel cutout matches XT4 dimensions.
Integration note
Four-pole breakers require a 4-pole busbar or separate phase-neutral jumpers.