The 105 mm width and 86 mm depth fit the standard SENTRON 3VA panel footprint — direct swap into existing 3VA mounting plates without re-drilling. The IP40 front protection means it's rated for indoor panel installation where tools or fingers might contact the front face; no condensation or dripping water exposure allowed on the front.
Thermal derating and endurance — real-world limits
The 63 A rating holds flat to 50 °C ambient. Above that it derates linearly: 60.6 A at 55 °C, 58.3 A at 60 °C, 55.9 A at 65 °C, and 53.6 A at 70 °C. Mechanical endurance is rated at 20,000 cycles — that's typical for a distribution MCCB, not a motor-switching contactor; expect it to last the life of the installation in a feeder role with infrequent manual switching. Maximum power loss is 4 W at rated current — negligible for panel thermal calculations, but worth noting if you're packing multiple breakers in a small enclosure with no forced ventilation.