The ABB S201-C10NA is a 1-pole + neutral miniature circuit breaker (MCB) from the S200 series, with a C-trip curve rated at 10 A.
Its 1-pole + neutral width (roughly 2 modules) fits the same cutout as other S200-series breakers, so a panel laid out for single-pole breakers can accept this unit without busbar or enclosure modification — just account for the neutral switching.