Rated insulation voltage is 800 V, and the breaker's interrupting capacity depends on the line voltage: 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, 17 kA at 500 V, and 11.9 kA at 690 V.
Current derating and thermal management
The 250 A rating holds from 40 °C through 50 °C, then steps down: 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, which matters for enclosure heat calculations.
Footprint: 140 mm wide, 158 mm high, 70 mm deep. Four poles in a single molded case.