Siemens 3VA1110-6MH32-0KA0 — 100 A SENTRON MCCB for Motor and Starter Protection
The Siemens 3VA1110-6MH32-0KA0 is a 3-pole SENTRON molded case circuit breaker (MCCB) rated for 100 A continuous current, built specifically as a starter protection version with a TM120M thermal-magnetic overcurrent release and an integrated shunt trip (STL). Its breaking capacity is 220 kA at 240 V, 154 kA at 415 V, 121 kA at 440 V, and 8.5 kA at 690 V — these figures mean it can safely interrupt very high fault currents at typical distribution voltages, making it suitable for installation close to large transformers or in high-fault-capacity industrial mains. The TM120M release provides thermal protection for overloads and magnetic protection for short circuits, tuned for motor and starter duty where inrush currents must be tolerated without nuisance tripping. Rated insulation voltage is 800 V, and the front face carries IP40 protection — suitable for enclosure mounting where the front panel is behind a door, not exposed to washdown.
Current Derating and Thermal Performance
The 3VA1110-6MH32-0KA0 holds its full 100 A rating from 40 °C through 50 °C ambient, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C — important for panels with high internal heat rise or adjacent heat-generating equipment. Operating temperature range is -25 °C to 70 °C; storage range is -40 °C to 80 °C, covering most indoor industrial environments.
Dimensions and Panel Fit
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep — a 3-pole MCCB footprint that fits standard SENTRON mounting patterns and busbar systems.