The ABB S803UE-K20 is a 1-pole miniature circuit breaker rated 13 A with a Trip Curve C characteristic, meaning it trips at 5 to 10 times rated current — suited for protecting inductive loads like motors and transformers where moderate inrush is expected. Its 10 kA interrupting capacity at 120 VAC ensures it can safely clear a hard fault without upstream coordination issues in a standard distribution panel.
The 1-pole footprint leaves room for additional poles or auxiliary contacts in the same row.