The Siemens SENTRON 3VA2110-6HN32-0HH0 is a 3-pole molded case circuit breaker rated for 100 A continuous current (Iu) at up to 50 °C ambient, with an ETU350 electronic trip unit for line protection. Its interrupting capacity hits 242 kA at 240 V and 187 kA at 415 V, meaning it can clear high-fault currents on a 400 V distribution bus without upstream coordination issues.
At 240 V the breaker clears 242 kA; at 415 V and 440 V it 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; above 50 °C it derates to 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C. If your panel ambient runs 60 °C, size the load at 92.5 A max.