Breaking capacity is the headline figure here: 242 kA at 240 V AC, 187 kA at 415 V and 440 V, 121 kA at 500 V, and 6 kA at 690 V. These are not theoretical maximums — they are the interrupting ratings the breaker can clear without welding or rupturing. For a 415 V distribution board, 187 kA SCCR means this breaker handles high-fault scenarios typical of large transformer-fed switchgear. Thermal derating is documented per the evidence: the breaker carries a full 250 A from 40 °C through 50 °C ambient, then derates to 238 A at 55 °C, 225 A at 60 °C, 213 A at 65 °C, and 200 A at 70 °C. Maximum power loss is 50.5 W, which factors into enclosure thermal calculations.
Physical dimensions: 181 mm height, 105 mm width, 86 mm depth. The breaker includes a trip indicator and an undervoltage release.