The 6 A B-curve thermal-magnetic trip handles general-purpose wiring protection for lighting, socket outlets, and small loads; the 10 mA residual-current element (Type AC, sensitive to sinusoidal AC fault currents) provides supplementary protection against lethal shock in wet or high-risk areas.
The 70 mm depth (D=70mm) is the standard RCBO footprint for Siemens 5SU series — it fits alongside other 1+N modules without crowding the enclosure. The 1+N-pole switching breaks both line and neutral on a fault, which is required in many national wiring regulations for final circuits.