The A9F08470 is a 4-pole Acti9 iC60H miniature circuit-breaker with a D-curve and a 0.5 A rated current. The 70 kA Icu at 415 V AC (IEC 60947-2) gives you full-rated interrupting capacity for high-fault panels; the 15 kA Icn at 400 V (IEC 60898-1) is the domestic/commercial rating for branch-circuit coordination. For a 0.5 A frame this is unusually high — it means you can place this breaker close to a large upstream transformer without cascading failure.
Snaps onto standard DIN rail. The 72 mm width (8 x 9 mm pitches) and 78.5 mm depth leave room in a shallow enclosure for wiring — the double terminals accept up to 25 mm² rigid or 16 mm² flexible, so you can land the feeder without a separate distribution block. IP20 rated, so it stays inside the panel; no washdown rating needed here.