What the ratings mean for fit
The 5SL6325-8CC is a Siemens SENTRON 3-pole miniature circuit breaker rated 25 A at 400 V AC with a D tripping characteristic and 6 kA breaking capacity per EN 60898. The D-curve means it tolerates high inrush currents — typically 10 to 20 times the rated current for short durations — making it the right choice for motor, transformer, or welding-equipment branch circuits where C-curve breakers would nuisance-trip on startup. The 6 kA breaking capacity at 400 V matches the standard domestic and light-commercial fault level; if your panel's prospective short-circuit current exceeds that, step up to a 10 kA rated sibling like the 5SL4363-7.
Panel fit and mounting
Occupies 3 modular width units (54 mm) on a DIN rail, with a 70 mm installation depth and overall depth of 76 mm. Accepts supplementary devices (shunt trip, auxiliary contacts) — the product extension is supported. Mounting position is any orientation; IP20 with conductors connected. Halogen-free and silicon-free construction, so it's safe for clean-room or sensitive-environment panels.