It is a 3-pole unit with C-curve tripping characteristic, rated 10 A at 400 V AC, and a 10 kA breaking capacity per EN 60898.
The derating table is the real-world selector: at 30 °C ambient the breaker carries the full 10 A, but at 40 °C it derates to 9.24 A, at 45 °C to 8.83 A, at 50 °C to 8.41 A, and at 55 °C to 7.96 A. Rated for 50/60 Hz, overvoltage category III, pollution degree 2, and vibration tested to 50 m/s² at 25 to 150 Hz per IEC 60068-2-6. That vibration spec means it holds up on a machine-mounted subpanel near a compressor or conveyor drive.
Sealable with a lead or tag, halogen-free and silicon-free, so it meets clean-environment requirements for food processing or semiconductor fab subpanels.