Siemens SENTRON 3VA2225-6JQ32-0BA0 — 250 A MCCB with 242 kA breaking capacity
At 415 V and 440 V it still holds 187 kA, dropping to 121 kA at 500 V and 4.5 kA at 690 V. The thermal derating curve is published: full 250 A holds through 50 °C, then steps down to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. That means in a warm panel — say 55 °C internal ambient — you lose 12 A of headroom; plan the load accordingly. The power loss at full rated current is 50.5 W maximum, which matters for ventilation planning inside a sealed enclosure.
The undervoltage release coil draws from the control circuit; verify the supply voltage matches the UVR rating on the nameplate before energizing. Communication wiring passes through the auxiliary terminal block — no special shielding required for the basic status signals.