The 76 kA breaking capacity at 240 V AC drops to 53 kA at 415 V, 32 kA at 440 V, and 12 kA at 500 V, so the interrupting rating must be checked against the available fault current at the point of installation.
The breaker measures 70 mm deep by 101.6 mm wide by 130 mm high. The 101.6 mm (4 in) width is standard for a 4-pole MCCB in this class.
The breaker holds 50 A continuously up to 50 °C ambient. Above that, it derates linearly: 49 A at 55 °C, 48 A at 60 °C, 46 A at 65 °C, 45 A at 70 °C. Maximum power loss is 15 W at rated load — negligible for panel heat calculation but worth noting if the breaker is packed tightly with other heat sources.