The Siemens 3VA2010-5HL32-0AD0 is a 3-pole SENTRON molded case circuit breaker rated for 100 A continuous current across a 40–50 °C ambient band, with the ETU320 electronic trip unit handling the overcurrent protection logic. Its interrupting capacity hits 187 kA at 240 V and stays above 121 kA at 415/440 V — numbers that tell you this breaker is built for high-fault panels where upstream coordination matters more than bare ampacity. The ETU320 release gives you adjustable long-time and short-time pickup and delay plus instantaneous protection, so you can dial in selective coordination without swapping the breaker body.
Thermal derating — real-world current at elevated panel temps
Above that it derates linearly: 96.25 A at 55 °C, 92.5 A at 60 °C, 88.75 A at 65 °C, and 85 A at 70 °C.
Maximum power loss is 13.5 W. In a dense panel with several breakers side by side, that heat adds up — account for it in your thermal budget.