The Siemens 3VA2110-5HN32-0AE0 is a 3-pole molded case circuit breaker from the SENTRON family, rated for a continuous current of 100 A at 40 °C and carrying a breaking capacity of 187 kA at 240 V — that is the headline short-circuit rating that decides whether it clears a fault without upstream coordination issues.
Breaking capacity across voltages — the real-world fault current
The interrupting rating drops with system voltage: 187 kA at 240 V, 121 kA at 415 V and 440 V, 79 kA at 500 V, and 4.25 kA at 690 V.
Thermal derating — don't size on the 100 A nameplate alone
Above that it 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 maximum power loss is 10 W, which is modest for a 100 A frame but still adds up in a crowded panel.
Panel fit and auxiliary contacts
The breaker ships with four auxiliary switches (HQ type) for remote status indication.