The S202-D10 is a 2-pole miniature circuit breaker from the ABB S200 series, rated 10 A with a Trip Curve D characteristic. It mounts on a standard DIN rail and is rated for 277 VAC circuits with a 6 kA interrupting capacity. The D-curve magnetic trip provides a high inrush immunity, making it suitable for motor and transformer branch circuits where the starting surge exceeds what a C-curve would tolerate.
Ratings and fit
The 10 A continuous rating sets the thermal threshold for overload protection. The D-curve means the magnetic instantaneous trip is calibrated to activate between 10x and 20x In (100–200 A), so it will not nuisance-trip on high inrush currents from small motors, solenoid valves, or transformers. The 6 kA interrupting rating at 277 VAC defines the maximum fault current the breaker can safely interrupt — verify that the available fault current at the panelboard does not exceed this value. The 2-pole configuration switches both line and load conductors, which is typical for single-phase 240 V or split-phase 277 V circuits.
Deployment context
Snaps onto a standard 35 mm DIN rail inside an enclosure or panelboard. The S200 series uses a common busbar system and accepts auxiliary contact, shunt trip, and undervoltage release accessories that clip onto the right side. For a panel OEM, the 2-pole width occupies two modular 17.5 mm spaces.