Its interrupting capacity of 242 kA at 240 V AC and 187 kA at 415 V AC means it can safely clear high-fault currents without cascading upstream — critical for industrial installations where available fault current exceeds 100 kA. The breaker holds its full 250 A rating up to 50 °C ambient; above that, thermal derating applies: 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. This derating curve matters when the breaker is in a crowded, poorly ventilated enclosure. At 690 V the breaking capacity drops to 4.5 kA, so this breaker is not suited for 690 V feeder duty where high fault current is expected — selectivity coordination at that voltage level requires a different frame.
Maximum power dissipation is 48 W at rated load, so adjacent devices need adequate spacing or forced ventilation to stay within the 70 °C operating maximum.