It protects a single-phase final subcircuit against overload, short-circuit, and earth leakage. Breaking capacity is 4.5 kA per EN 60898 and 15 kA per IEC 60947-2, so it clears faults up to those levels without welding contacts.
At 10 A, that's 50 to 100 A instantaneous trip. The unit is 1P+N (switched phase, switched neutral), so it disconnects both conductors on fault. Rated insulation voltage is 264 V, surge voltage resistance 4 kV, overvoltage category III — suitable for fixed-installation distribution boards. Operating frequency is 50 Hz only. Temperature derating is published: at 40 °C the rating drops to 9.5 A, at 50 °C to 9 A, at 60 °C to 8.5 A.
Width is 2 modular units (36 mm), depth 77 mm, installation depth 70 mm. Mounting position any — no derating for upside-down or horizontal. Supply can enter from top or bottom. IP20 with conductors connected and distribution board installed. Pollution degree 2, so it's fine for normal dry indoor environments.