The 70 kA Icu at 415 V AC is the figure to use for 400 V class systems; the breaker carries an H breaking-capacity code (70 kA at 415 V AC).
No earth-leakage protection is integrated — that is a separate add-on or a different trip unit. Pollution degree 3 (IEC 60664-1) means the breaker is rated for conductive-pollution environments typical of industrial panels. Overvoltage category III confirms it is intended for fixed-installation distribution boards, not for downstream equipment-level protection. Mechanical durability is 50,000 cycles; electrical durability varies by load — 50,000 cycles at 440 V at half rated current, 30,000 cycles at 440 V at full rated current, and 10,000 cycles at 690 V at full rated current. The breaker dissipates 5.47 W per pole, which matters for enclosure heat-rise calculations in a multi-breaker panel. IP40 front-face protection means it is not washdown-rated; keep it in a dry enclosure.
It can be mounted horizontally or vertically flat on the back. The five accessory slots accept auxiliary contacts, shunt trips, undervoltage releases, or motor operators. IK07 impact resistance means the enclosure face can withstand a 2 J impact — standard for panel-mounted breakers.