What this breaker is and why the ratings matter
The ABB 1SDA068132R1 is a current-production XT4N 160 molded-case circuit breaker fitted with an Ekip LSI trip unit, set at 40 A continuous current on a 160 A frame. That means the breaker is sized for a 40 A branch circuit, but the frame itself can handle the thermal and mechanical stresses of a 160 A assembly. The trip unit is the intelligent part — it offers LSI (long-time, short-time, instantaneous) protection curves you can adjust for selective coordination.
Rated for three-phase distribution at 690 V
Three poles, rated 690 V AC, 50/60 Hz. That covers standard LV distribution in most industrial panels. The 40 A continuous rating is the number you match to the load; don't let the 160 A frame figure confuse the BOM line — the installed trip rating is what governs coordination and protection.