Its interrupting capacity reaches 242 kA at 240 V and 187 kA at both 415 V and 440 V, dropping to 5 kA at 690 V — figures that define its use as a main or feeder breaker in high-fault industrial distribution panels.
Thermal derating and enclosure planning
In a panel with ambient near 55 °C — common in a petrochemical switchroom with no active cooling — expect 154 A available. Maximum power loss is 25.5 W.
