The Siemens SENTRON 3VA2010-5KP32-0HH0 is a 3-pole molded case circuit breaker rated for 100 A continuous current at 40 °C, with an interrupting capacity of 187 kA at 240 V — enough to handle high-fault utility feeds or large transformer secondaries without cascading upstream. A built-in shunt trip (STL) allows remote opening from a PLC or safety relay.
Panel fit and thermal derating
At 55 °C the continuous rating derates to 96.25 A, and at 70 °C it drops to 85 A; if your enclosure runs hot, size the upstream conductor for the derated value. The 13.5 W maximum power loss matters for sealed enclosures — account for it in your thermal budget.