What this RCBO is and what the ratings mean
The Siemens 5SU1354-6KV20 is a combined residual-current circuit breaker with overcurrent protection (RCBO) in a 1+N-pole form factor — Type A sensitivity for pulsating DC and AC residual currents, 30 mA trip threshold for personal protection, and a 10 kA breaking capacity that handles fault currents on a standard residential or light-commercial distribution board. The B-curve 16 A thermal-magnetic trip protects cable and loads against short-circuit and moderate overload; the 30 mA residual element covers the earth-leakage side. The 70 mm housing width (D=70mm) means it occupies two standard modular DIN-rail spaces, so plan the panel layout accordingly.
Mounting and integration
Snap-on DIN-rail mount, 70 mm width (two modular spaces). The 1+N-pole configuration switches the line conductor and provides neutral switching via the residual-current module. Type A detection covers sinusoidal AC and pulsating DC faults — relevant for downstream electronics, LED drivers, or single-phase rectifier loads that generate pulsed DC leakage.