The IP20 rating with conductors connected is standard for enclosed panel gear — no special sealing needed.
Breaking capacity and selectivity — why both numbers matter
The 10 kA rating is the lower bound for installations governed by EN 60898; the real-world headroom is the 35 kA IEC figure. Energy limitation class 3 means it lets through less let-through energy (I²t) than a class 2 or 1 breaker, which helps with downstream device coordination — you can size downstream components closer to their ratings.
Temperature derating — the 0.5 A rating isn't fixed
The 0.5 A rating holds at 35 °C. At 40 °C it derates to 0.48 A, at 50 °C to 0.45 A, and at 60 °C to 0.42 A. That's a common gotcha for MRO planners swapping in a standard-rated MCB without checking the thermal curve.