The ABB S803N-B80 is a 3-pole C-curve 100 A miniature circuit breaker from the S800N series, classified as a molded case circuit breaker (MCB) for panel and distribution board mounting. The S800N series is ABB's high-density MCB platform — the 3-pole footprint fits standard DIN-rail enclosures, and the 100 A rating covers feeder circuits and sub-distribution in commercial and light industrial panels.
The C-curve (100 A) means the magnetic trip threshold sits at 5–10× In — 500 to 1000 A instantaneous — so it tolerates the inrush of a 30–40 kW motor or a bank of LED drivers without dropping out, but still clears a hard fault fast enough to protect the cable.