The ABB 1SDA058222R1 is a rating plug for ABB circuit breakers, set for an In of 800 A. This plug defines the breaker's continuous current rating and its thermal-magnetic trip threshold.
What the Rating Means
The In=800 A marking sets the breaker's nominal current. In a panel, that means the breaker's overload curve is calibrated for 800 A continuous load — the plug is the component that makes the breaker frame match the circuit ampacity. Swapping the rating plug is how you re-rate a fixed-frame breaker without replacing the entire unit.