The Siemens 5SL4325-8 is a SENTRON miniature circuit breaker — 3-pole, D tripping characteristic, rated 25 A at 400 V AC, with a 10 kA breaking capacity certified to both EN 60898 and IEC 60947-2. At 40 °C ambient the breaker derates to 23.68 A; at 55 °C it carries 21.54 A — factor that into your panel thermal budget if the enclosure runs hot.
The 5SL4325-8 carries the usual SENTRON compliance package: halogen-free and silicon-free construction, overvoltage category III, pollution degree 2, and energy limitation class 3. It is sealable for anti-tamper applications. For specific RoHS, REACH, or UL documentation, the manufacturer's declaration is available with the shipment.