It's built for line protection — meaning it sits upstream of a distribution board or a heavy load, clearing faults before they damage downstream wiring or equipment. The interrupting capacity is the headline here: 75.6 kA at 240 V AC, 52.5 kA at 415 V, 32 kA at 440 V, and 11.9 kA at both 500 V and 690 V. The 20 A rating holds steady from 40 °C up to 55 °C, then derates to 19 A at 60–70 °C — useful to know if the breaker sits near heat sources or in a warm enclosure.
IP40 on the front. If you need remote tripping or ground-fault detection, you'd add external accessories or step to a different 3VA variant.