The ABB S804S-D25 is a 4-pole miniature circuit breaker from the S800S series, rated for 25 A continuous current with a Trip Curve D characteristic at 230 VAC.
Trip Curve D and deployment context
Trip Curve D provides magnetic trip between 10× and 20× In (250–500 A instantaneous), sized for loads with high inrush current — motor starters, transformer primaries, welding equipment, or large capacitor banks. On a DIN-rail panel, the 4-pole format occupies four module widths; verify that the enclosure fill factor and thermal derating at elevated ambient temperatures stay within the S800S published limits.
