The 10 mA sensitivity is the key spec here: that's the threshold for direct-contact protection, meaning it's meant for circuits where even a small leakage to ground needs to clear fast — think wet locations, medical areas, or handheld equipment. The Type A classification means it detects both sinusoidal AC residual currents and pulsed DC residuals, which covers most modern electronics with half-wave rectification. Rated 25 A continuous at 220-240 V AC, so it's sized for a branch circuit feeding a few socket outlets or a dedicated piece of equipment, not a main switch.
That's the footprint you need to reserve in the enclosure. The instantaneous trip means no intentional delay, so it coordinates with upstream devices that have a time delay; you'd pair it with a Type S or selective RCCB upstream if you need discrimination.