What this MCB carries
The ABB S801S-K50 is a 1-pole miniature circuit breaker from the S800S series, rated 50 A at 230 V AC with a Trip Curve K characteristic and a 50 kA interrupting rating. The K curve is designed for motor and inductive loads — it tolerates the inrush without nuisance tripping while still clearing a hard fault. DIN rail mount, so it clips straight into a standard panel enclosure.
Panel integration note
Snap-on DIN rail mount, standard 35 mm. The S800S frame uses a dedicated busbar system — verify the busbar pitch matches your existing distribution block if you're retrofitting into an older panel. Spring-cage terminals accept 0.2–2.5 mm² solid or ferruled stranded; strip length 8 mm.