Its interrupting ratings reach 187 kA at 240 V, 121 kA at 415 V, and 5.1 kA at 690 V, giving it headroom for high-fault installations.
The breaker carries its full 250 A rating from 40 °C up to 50 °C, then derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. In a sealed enclosure or high-ambient panel, that derating curve determines the real-world ampacity — size your conductors and ventilation accordingly. The 3VA2 frame measures 105 mm wide by 181 mm tall by 86 mm deep, which fits standard Siemens 3VA panel cutouts and busbar systems.