Siemens 3VA1110-6MH32-0KA0 — 100 A SENTRON MCCB for Motor and Starter Protection
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.
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.
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.