What it is and where it fits
The ABB S803S-C6 is a 3-pole miniature circuit breaker (MCB) from the S800S series, rated C-curve 6 A. It snaps onto a standard DIN rail inside a panel enclosure, protecting branch circuits against overload and short-circuit in commercial and light-industrial installations. The C-curve characteristic means it trips between 5 and 10 times rated current — suited for circuits with moderate inrush, such as motor starters or lighting banks. The 6 A rating governs the continuous load; size the upstream selectivity accordingly.