The 5SU1156-7KV13: The 10 mA IΔn is the residual-current threshold — it trips on earth faults as low as 10 mA, which is the standard for protecting wet-area circuits (bathrooms, outdoor sockets, medical locations) where a 30 mA device might not catch a lethal leakage path through a person.
The 70 mm width (four modules) is wider than a standard single-pole MCB because the RCBO packs both the RCD coil and the breaker mechanism in one housing. Neutral is factory-connected through the solid bar on the N-pole side — no separate neutral link needed downstream. Rated for use in TN, TT, and IT earthing systems per IEC 60898-1.