Its breaking capacity reaches 121 kA at 240 V and 75.6 kA at 415 V, with a rated insulation voltage of 800 V.
The 50 A rating is maintained from 40 °C up to 50 °C, then derates to 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, and 45 A at 70 °C. This thermal derating curve matters when the breaker is mounted in a warm enclosure or alongside other heat-generating devices — the actual continuous current it can carry drops as ambient rises. The 121 kA breaking capacity at 240 V and 75.6 kA at 415 V mean this MCCB can safely interrupt high fault currents typical of large transformer-fed panels or motor control centers. At 500 V and 690 V the capacity is 11.9 kA, so verify the available fault current at the point of installation if the system voltage is above 440 V. The undervoltage release is not fitted, so if undervoltage protection is required, a different variant or an add-on accessory is needed.
Panel integration
The breaker measures 130 mm high, 76.2 mm wide, and 70 mm deep, fitting standard 3-pole MCCB panel cutouts. Power loss is 14.6 W maximum, which should be factored into enclosure thermal calculations to avoid exceeding the 70 °C maximum operating temperature.