Breaking capacity reaches 187 kA at 240 V, dropping to 121 kA at 415 V and 75.6 kA at 440 V — numbers that matter when you're coordinating downstream with a motor starter and need the MCCB to take the full fault without upstream interruption.
Current derating and thermal budget
Above that, it derates linearly: 122 A at 55 °C, 120 A at 60 °C, 117 A at 65 °C, and 114 A at 70 °C. The maximum power loss is 28.1 W, which is the heat the breaker dumps into the enclosure; factor that into your panel thermal calculation, especially in a sealed cabinet.
Panel fit and protection class
The breaker measures 70 mm deep by 76.2 mm wide by 130 mm tall — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without surprises.