At 400 V line-to-line that covers most industrial panel secondary faults.
Thermal derating matters in a warm panel
The 10 A rating is at 35 °C ambient. Inside a crowded enclosure at 50 °C the breaker is good for 8.74 A; at 60 °C it drops to 8.04 A. If you're loading a branch near the nominal rating, check the actual panel ambient — the 5SY7 series derates linearly above 35 °C. That's not a datasheet footnote; it's the difference between a circuit that holds and one that nuisance-trips on a hot afternoon.
Sealable and touch-protected, so it's suitable for meter cabinets or utility compartments where sealing is required.