Its interrupting capacity peaks at 121 kA at 240 V, dropping to 75.6 kA at 415 V, 52.5 kA at 440 V, and 11.9 kA at both 500 V and 690 V — figures that govern its use in high-fault industrial distribution panels where selectivity with downstream breakers is required.
Thermal derating and installation fit
The breaker holds its full 32 A rating from 40 °C to 50 °C, then derates to 31 A at 55–60 °C and 30 A at 65–70 °C — a gentle slope that usually avoids de-rating in a ventilated enclosure. Dimensions are 130 mm height, 101.6 mm width, 70 mm depth; the width and 4-pole form factor determine the DIN-rail span and the cut-out in a panel gland plate. Front IP40 protection suits closed-panel mounting. Maximum power loss is 10.6 W, which contributes to the enclosure thermal budget.
The N-conductor is not protected (no 4-pole 4-protection version).