The Siemens 5SU9356-2CN10 is a combined residual current device and miniature circuit breaker (RCBO) for a 1+N pole configuration, rated at 10 A with a D tripping characteristic and type AC residual current sensitivity. The 6 kA breaking capacity covers the majority of domestic and light commercial final circuits where the prospective short-circuit current stays under that threshold. D-curve means it tolerates the inrush of motorized loads — pumps, compressors, small conveyors — without nuisance tripping on start-up.
What the ratings mean for fit
The D characteristic (10–20× In magnetic trip) is the key selection parameter here — it defers the instantaneous trip to roughly 100–200 A for this 10 A unit, which is what lets it ride through the starting surge of a motor or a bank of fluorescent ballasts. Type AC residual sensing detects sinusoidal AC fault currents only; if the installation has electronic loads that generate pulsed DC fault currents (VFDs, LED drivers, UPS), a type A RCBO would be the correct choice instead. The 6 kA breaking capacity is the maximum fault current the device can safely interrupt — verify the prospective short-circuit current at the point of installation does not exceed that figure.
Panel integration
Snap-on mounting to standard DIN rail. The 1+N module width (roughly 2 modules) fits a standard distribution board cutout. Termination accepts copper conductors up to the rated cross-section typical for 10 A final circuits.