The Siemens SENTRON 5SV9316-1CN25 is a 2-pole (1P+N) RCD-operated circuit breaker — an RCBO — rated 25 A at 30 °C with a C-curve trip characteristic. It breaks fault currents up to 6 kA per EN 60898 and IEC 60947-2 at 230/240 V AC, 50/60 Hz.
The 25 A rating at 30 °C derates to 23.75 A at 40 °C and 21.5 A at 55 °C — if your panel runs warm, size the load to the lower figure, not the headline number. It's an AC-type RCD (Type of Fault Current: AC) so it detects sinusoidal AC earth faults only. For pulsed DC or mixed-frequency faults (EV chargers, VFD-fed loads), you'd need a Type A or Type B device. IP20 with the distribution board installed and conductors connected — it's not sealed for washdown, so keep it inside the enclosure.