The Siemens SENTRON 3VA2110-6HN36-0JL0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C, with the ETU350 electronic trip unit handling line protection. At 415 V and 440 V it still holds 187 kA, dropping to 121 kA at 500 V and 5 kA at 690 V.
The 100 A rating holds flat from 40 °C to 50 °C, then steps down: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. The 10 W maximum power loss is the heat it dumps into the enclosure; factor that into your thermal budget if you're stacking several MCCBs in a sealed box.
Auxiliary contacts and shunt trip
The integrated auxiliary trip module is order code 3VA9688-0BL32; the basic switch is 3VA2110-6HN36-0AA0. The 20,000-cycle mechanical endurance is typical for an MCCB in a distribution panel that sees a few operations per year; not for a frequent-switching application.