The Siemens 3VA2010-5HL36-0BH0 is a SENTRON molded case circuit breaker rated for 100 A continuous current across the full 40 °C to 70 °C ambient range — no derating needed up to the 70 °C operating maximum. That means it holds its full 100 A rating in a warm panel without recalculating the load schedule. Breaking capacity runs 187 kA at 240 VAC, 121 kA at 415/440 VAC, 75.6 kA at 500 VAC, and 3 kA at 690 VAC. For a 480 V distribution panel, the 121 kA SCCR at 440 V gives a solid safety margin above typical available fault currents — you're not chasing selectivity studies with a borderline breaker.
Physical fit and auxiliary wiring
That 86 mm depth (3.39 in) is the dimension you check against the enclosure backplate clearance — the breaker body plus the supplied undervoltage release and the 2 auxiliary + 1 trip alarm switch stack (HQ type) fit within that depth, so no need to oversize the cabinet just for the aux block. Power loss is 16 W maximum at rated current — negligible for panel thermal budgeting but worth noting if you pack multiple breakers in a sealed enclosure without forced ventilation.