Breaking capacity is 15 kA per EN 60898 and 30 kA per IEC 60947-2, both at 50/60 Hz. The 30 kA figure under 60947-2 gives you headroom for high-fault installations where the utility-side SCCR exceeds 15 kA — common in industrial mains distribution.
Derating and thermal reality
The 10 A rating holds at 35 °C ambient. At 40 °C it derates to 9.52 A; at 50 °C to 9.02 A; at 60 °C to 8.48 A. If your panel internal temp runs hot — say a sealed enclosure with drives — size the load or the breaker accordingly. Energy limitation class 3 means it lets through less let-through energy than a class-2 breaker, which helps with downstream component coordination.
Halogen-free and silicon-free construction suits environments where outgassing matters — clean rooms, food processing, or sealed enclosures near sensitive optics. Sealable option (padlockable toggle) is standard on this variant. Rated for -40 °C to 75 °C ambient, so it handles unheated warehouse or rooftop cabinet duty without a heater.