20 A rated current — what it means for branch-circuit protection
The 1SDA068080R1 is an ABB XT4N 160 TMD MCCB with a rated current (In) of 20 A and a frame rating (Iu) of 160 A. The 20 A In sets the continuous load the breaker carries without tripping — this is the selection number for the branch circuit. The 160 A Iu means the same chassis accepts a higher-rated trip unit (up to 160 A) later if the load grows, without replacing the entire breaker. Three poles fit three-phase feeders.
Current-production — no lifecycle risk for new BOMs
Estimated lead time is 2–4 weeks, typical for current-production ABB MCCBs.
Dimensions are 8.25 cm wide x 10.5 cm deep x 16 cm tall. The XT4 frame size is a standard ABB moulded-case footprint — confirm the panel cutout and busbar spacing match the existing XT4 mounting pattern before specifying.