It carries a continuous current rating of 100 A at 40 °C, holds that rating flat through 50 °C, then derates to 98 A at 55 °C, 96 A at 60 °C, 94 A at 65 °C, and 91 A at 70 °C — so in a warm enclosure you lose about 9 % of capacity at the top of the operating range. Maximum power loss is 27.5 W — that's the heat you need to vent from the panel, not just a datasheet number.
Breaking capacity — what it means for fault duty
This MCCB interrupts 121 kA at 240 V, 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V.
Built-in undervoltage release
Factory-fitted with an undervoltage release (UVR) — part of the auxiliary release design.
Width is 76.2 mm (3 in), depth 70 mm (2.76 in), height 130 mm (5.12 in) — that's a standard 3-pole MCCB footprint. The 70 mm depth means it clears most shallow enclosures, but check the gland-plate clearance if you're back-paneling with a dead-front cover.