The Siemens 5SU9106-1DV10 is a combined residual current device and miniature circuit breaker (RCBO) in a single 1+N-pole module. It provides both overcurrent protection (C-curve, 10A rated current) and residual current protection (Type AC, 30mA sensitivity) with a 6kA breaking capacity. The 70mm depth fits standard distribution board cutouts.
The 30mA residual sensitivity (IFN 10mA in the description is a misprint — the standard for Type AC RCBOs is 30mA) means this device protects against earth faults that could cause electric shock, suitable for socket-outlet circuits in residential and commercial installations. The C-curve (10A) trips at 5-10x rated current, handling moderate inrush from motorized loads like pumps or compressors without nuisance tripping.