The ABB S203-D13 is a 3-pole miniature circuit breaker rated at 10 A with a Trip Curve D characteristic, meaning it is designed to tolerate high inrush currents — typically 10 to 20 times the rated current — before tripping magnetically. This makes it the right choice for loads with a heavy starting surge, such as motors, transformers, or discharge lighting, where a Curve C breaker would nuisance-trip on startup. For a panel builder, that translates to faster assembly and easier rework: pull the clip, slide it off, replace it. The 3-pole configuration covers three-phase circuits; if you are protecting a single-phase branch, you would use a 1-pole variant from the same S200 series.
Deployment context
The 3-pole format occupies three module widths (about 54 mm) on the rail. For a panel OEM or wireman, that is a known footprint — no surprises when laying out the gland plate or calculating fill factor. The thermal-magnetic trip device means no external trip unit or power supply needed; it is self-contained and ready to wire.