At 240 V it interrupts 187 kA; at 415 V and 440 V that holds at 121 kA, dropping to 75.6 kA at 500 V and 4.5 kA at 690 V — the interrupting capacity scales with system voltage, so the 690 V figure is the one to check if you're on a 690 V line. The thermal derating curve is flat from 40 °C to 50 °C at 250 A, then steps down: 241 A at 55 °C, 232 A at 60 °C, 222 A at 65 °C, and 213 A at 70 °C.
Trip unit and auxiliary contacts
The ETU320 is an electronic overcurrent release with a trip indicator. It does not include ground-fault monitoring or a communication function — this is a straightforward line-protection breaker, not a power-monitoring device. The basic switch assembly is order code 3VA2225-5HL42-0AA0.