The Siemens SENTRON 3VA2110-6HN32-0BH0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at up to 50 °C ambient, with the ETU350 electronic trip unit handling line protection. That 100 A holds flat from 40 °C through 50 °C — no early derating — then steps down 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. The interrupting ratings are substantial: 242 kA at 240 V, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 5 kA at 690 V.
The 3VA2110-6HN32-0BH0 measures 105 mm wide, 181 mm tall, and 86 mm deep — that 86 mm depth is the dimension that matters when you're laying out the gland plate or checking clearance behind a swing-panel door.
The 12.5 W maximum power loss is the heat it dumps into the enclosure at full load — that's the number the thermal engineer uses to size the cabinet ventilation or cooling. The latching endurance of 20 000 operations means the mechanical mechanism is rated for that many close-open cycles before wear-out; for a main breaker that cycles once a day, that's about 55 years of service life.