What this 63 A D-curve MCB is for
For UL 1077 supplementary protection it's rated 5 kA, so check which standard your panel spec calls out.
IP20 with conductors connected, so it's panel-only — not for wet or outdoor locations without a sealed enclosure.
Halogen-free and silicon-free construction, which matters in clean-room or sensitive electronics environments where outgassing can cause contact corrosion. Humidity tolerance is specified: max 95% at 55 °C, derating to 55% at 70 °C and 35% at 75 °C. Neutral conductor switching is integrated — the 1P+N design breaks both phase and neutral, which some local codes require for final subcircuits.