Siemens 3VA1225-6GF42-0HH0 — 250 A SENTRON MCCB, 4-Pole, Line Protection
Breaking capacity hits 220 kA at 240 V, 154 kA at 415 V, 75.6 kA at 440 V, 30 kA at 500 V, and 17 kA at 690 V — that covers fault-current duty from low-voltage service entrances up to 690 V motor control centers without cascading upstream.
Thermal Derating and Power Loss
Rated 250 A from 40 °C through 50 °C ambient; above that it derates in 5 °C steps: 243 A at 55 °C, 237 A at 60 °C, 230 A at 65 °C, and 223 A at 70 °C. Maximum power loss is 57 W — that matters for enclosure heat rise calculations when the panel is fully populated.
Auxiliary and Release Configuration
No undervoltage release fitted from the factory. No ground-fault monitoring version.
Footprint: 140 mm wide × 158 mm high × 70 mm deep. Four-pole width at 140 mm is standard for this frame size; check adjacent device spacing for heat dissipation.