At 240 V it interrupts 187 kA, at 415/440 V it holds 121 kA, and at 690 V it still clears 4.5 kA. The 250 A frame is fully rated across the 40–50 °C band with no derating, then steps down to 213 A at 70 °C — useful if the breaker lives near a heat source or in a poorly ventilated enclosure.
Built-in diagnostics and auxiliary switching
A trip indicator is standard — you get a visual flag that the breaker opened on a fault, not a manual switch-off. The auxiliary switch configuration is 1 auxiliary + 1 trip alarm switch HQ, which gives you both a position-follow contact and a separate contact that only closes on a trip event. That pair lets a PLC or SCADA system distinguish between a commanded open and a protective trip without extra wiring.