Breaking capacity is 121 kA at 240 V AC, 75.6 kA at 415 V, and 52.5 kA at 440 V — high enough for most secondary distribution applications where fault currents are substantial. At 690 V it still interrupts 11.9 kA.
Sizing and thermal considerations
The 32 A rating holds steady from 40 °C up to 50 °C, then derates to 31 A at 55–60 °C and 30 A at 65–70 °C. That thermal curve means you can run it near its nameplate in a warm panel without stepping down a frame size, but above 50 °C you lose about 1 A per 10 °C.