The ABB 1SDA068131R1 is an XT4N frame distribution circuit breaker with an Ekip I electronic trip unit, rated 250 A at 690 V AC, 50/60 Hz. The In=250 A is the adjustable overload setting; the Iu=160 A is the unconditional current rating of the frame itself, meaning the breaker carries 160 A continuously without exceeding thermal limits. This 3-pole breaker is sized for distribution panels, switchgear, or main feeder protection in commercial and industrial installations up to 690 V.
Three-pole design, 50/60 Hz rated; the Ekip I trip unit allows field adjustment of the long-time and short-time pickup settings, so you’re not locked into the factory In=250 A if your load draws less.