What this RCBO covers
The Siemens 5SU9306-0DV16 is a combined residual current device and miniature circuit breaker (RCBO) in a single 1+N-pole module. It provides both earth-leakage protection (Type AC, 30 mA trip) and overcurrent/short-circuit protection (B-curve, 16 A rated current) with a 6 kA breaking capacity. The 'D=70mm' dimension refers to the depth of the device body for enclosure planning.
Deployment context
Snap-on mounting to standard DIN rail (EN 60715) for panel or enclosure installation. The 1+N-pole format occupies a single module width, saving rail space in residential or light-commercial distribution boards. Type AC detection covers sinusoidal AC residual currents — the common fault type in circuits feeding resistive and electronic loads without DC components.