The Schneider Electric A9DF7632 is an Acti9 iCV40 RCBO — a combined overcurrent and earth-leakage protection device in a single 36 mm wide, 1P+N module. Breaking capacity is 6000 A Icn at 230 V AC, 50/60 Hz, conforming to EN/IEC 61009-2-1 — limitation class 3. That means it limits let-through energy enough to protect downstream wiring under fault conditions, not just clear the fault.
The 32 A rated current is the continuous load it can carry without tripping — size your circuit so the expected load stays under that. The 300 mA earth-leakage sensitivity is a general-purpose level for protection against fire risk from ground faults, not personnel protection (that needs 30 mA or lower).