That's unusual for an MCCB; many competitors start dropping current above 40 °C. The 800 V rated insulation voltage tells you the internal clearances and creepage are designed for 690 V systems, so it's safe on 400/480/690 V line-to-line circuits. The shunt trip (STL) is factory-installed on this variant, so you don't have to order a separate accessory and wire it in the field — one less thing to carry on the van. The basic switch module is order code 3VA21635HN320AA0, which is the replaceable core if the breaker ever needs internal service.
Depth of 86 mm means it clears most standard enclosure backplates without hitting the door or gland plate. If you're swapping a failed 3VA2163-5HL32-0DB0 (a similar SENTRON variant), the physical footprint is identical — no rewiring needed, just match the trip curve and accessories.