The Siemens SENTRON 5SN6110-7CN is a 1-pole miniature circuit breaker rated 10 A with a C-curve trip characteristic and a 6 kA breaking capacity per EN 60898 at 230/400 V AC. For a 10 A breaker, that puts magnetic trip between 50 A and 100 A. Rated operational voltage is 400 V AC for multi-phase operation, with a maximum of 440 V AC. Single-phase operation is rated at 250 V AC. The breaker is not designed for DC circuits beyond 72 V maximum.
The 1 MW width means you can pack up to 12 single-pole breakers per 216 mm of rail — useful when filling a high-density sub-distribution board. Terminals accept solid conductors up to 25 mm², which is generous for a 10 A breaker — you can feed it with a larger supply tail and still have the branch protection at the right ampacity.
That part is wider (54 mm / 3 MW) and offers a higher interrupting rating, but it will not drop into a 1-pole slot without rewiring the busbar arrangement. If your design is locked to a 1-pole form factor, the 5SN6110-7CN is the direct fit.