It carries a breaking capacity of 242 kA at 240 V, stepping down to 187 kA at 415 V and 440 V, 121 kA at 500 V, and 4.5 kA at 690 V — the high interrupt rating at lower voltages makes it a strong choice for fault-current-heavy service entrances or transformer secondaries where SCCR headroom is needed.
The 250 A continuous rating holds flat from 40 °C through 50 °C, then derates 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 ambient — you lose 12 A of headroom; plan the load accordingly if the breaker sits near other heat sources. Maximum power loss is 50.5 W. That's the heat the breaker dumps into the enclosure at full rated current — factor it into your panel thermal budget, especially in a sealed NEMA 12 cabinet.
Verify the bus-bar pitch matches your existing distribution block before committing the BOM line. No auxiliary switch is fitted from the factory (design of the auxiliary switch: without), so if you need a separate NO/NC contact for a PLC input, order the auxiliary switch module separately. No ground-fault monitoring is built in (ground-fault monitoring version: without); add an external GF module if the application requires it.