The Siemens 5SU9306-0DV32 is a combined residual current device and miniature circuit breaker — an RCBO — in a 1+N-pole form factor. It carries a Type AC (CO) residual current detection rated at 30 mA, a 6 kA breaking capacity, and a B-curve overcurrent trip set at 32 A. The D=70 mm depth fits standard DIN-rail enclosures.
The 30 mA sensitivity addresses personal protection against direct contact (IEC 60364-4-41). The B-curve trips between 3 and 5 times rated current, suited for resistive and mixed loads where inrush is moderate — typical for lighting, small appliances, and general-purpose final circuits in residential or light commercial panels.