Siemens 3VA2010-6HL32-0AC0 — 100 A MCCB with ETU320 Trip Unit
The Siemens SENTRON 3VA2010-6HL32-0AC0 is a 3-pole molded case circuit breaker (MCCB) rated for 100 A continuous current at 40 °C, with a rated insulation voltage of 800 V. It carries a 242 kA breaking capacity at 240 V, dropping to 187 kA at 415 V and 440 V, and 121 kA at 500 V — at 690 V it still holds 4 kA. The electronic trip unit is an ETU320, a line-protection variant (no ground-fault or voltage-trip function).
Current rating holds flat at 100 A from 40 °C up to 50 °C; above that it derates linearly to 85 A at 70 °C. Maximum power loss is 13.5 W, which is manageable for a standard steel enclosure with passive ventilation. That depth (86 mm) is shallow enough to fit most 200 mm deep enclosures without a gland-plate conflict.