What this RCBO carries
The Siemens 5SU9306-1DV06 is a combined residual current device and miniature circuit breaker — an RCBO — in a single 1+N-pole module. It protects against earth faults and overloads in one DIN-rail unit, saving a slot in the panel compared to separate RCD and MCB. Rated at 6 A with a C-trip curve, it handles moderate inrush from motorized or capacitive loads without nuisance tripping, while the 30 mA residual sensitivity covers personnel protection (AC type, for sinusoidal AC fault currents). The 6 kA breaking capacity at the rated voltage is sized for domestic and light commercial distribution boards where the prospective fault current stays under that threshold. The 70 mm depth (D=70mm) is the standard dimension for Siemens 5SU series RCBOs. The 1 MW marking on the description is a catalog reference, not a power rating.