80 A, Curve K, 50 kA — what that means for your panel
The S802S-K80 is an ABB high-performance miniature circuit breaker, 2-pole, rated 80 A continuous at 230 VAC. The Trip Curve K characteristic means it trips between 8 and 12 times rated current on short-circuit — designed for motor and inductive loads where inrush is higher than a resistive load but you still want fast clearing on a hard fault. The 50 kA interrupting rating at 230 VAC gives serious fault-current headroom; this breaker can safely clear a 50 kA short without welding its contacts or venting arc plasma into the enclosure. That SCCR matters when the upstream transformer is big or the available fault current is known to be high — it avoids cascading failure downstream.