250 A line protection with 187 kA interrupting rating
Its interrupting capacity reaches 187 kA at 240 V AC, dropping to 121 kA at 415 V and 440 V, 75.6 kA at 500 V, and 4.5 kA at 690 V — the 187 kA figure at 240 V gives headroom for high-fault utility feeds or transformer secondaries where available fault current exceeds typical MCCB ratings.
The breaker holds its full 250 A rating up to 50 °C ambient; above that it derates to 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C. Dimensions are 181 mm high, 105 mm wide, 86 mm deep — the 105 mm width fits standard 3-pole MCCB mounting footprints in switchboards and panelboards. Front IP40 protection covers the operator interface; the body is not sealed for washdown environments.