It carries a continuous current of 100 A at 40 °C ambient, with no derating needed up to 50 °C — at 55 °C it still holds 98 A, and at 70 °C it's 91 A. That means for most panel environments below 50 °C you get full rated capacity without calculating a temperature correction factor. The interrupting ratings are the headline: 187 kA at 240 V AC, 121 kA at 415 V, 75.6 kA at 440 V, and 17 kA at 500 V and 690 V.
Dimensions are 130 mm high, 76.2 mm wide, 70 mm deep — a standard 3-pole MCCB footprint that fits most DIN-rail or panel-mount enclosures without re-drilling. The trip indicator is present, so a blown breaker is visible through the front window without opening the panel.