Breaking capacity is 75.6 kA at 240 V and 11.9 kA at 690 V.
Breaking capacity and derating
The 32 A rating holds flat from 40 °C through 50 °C, then derates to 31 A at 55–60 °C and 30 A at 65–70 °C. That means in a warm panel — say 55 °C internal ambient — you lose 1 A of headroom. The 75.6 kA at 240 V is the highest interrupt rating; at 690 V it drops to 11.9 kA, so verify the available fault current at your line voltage before specifying.
Panel fit
Dimensions are 70 mm deep, 101.6 mm wide, 130 mm high — a 4-pole MCCB that occupies roughly 4 inches of DIN-rail width.