The Siemens SENTRON 3VA2110-5HL32-0JL0 is a 3-pole molded case circuit breaker (MCCB) rated for line protection, carrying 100 A continuous at 40 °C and an interrupting capacity of 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. The ETU320 electronic trip unit handles the overcurrent release, and the auxiliary contact set includes 2 auxiliary switches plus a trip alarm and an electrical alarm switch (HQ).
Thermal derating — the real continuous-current limit
The 100 A rating holds at ambient up to 50 °C; 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.