The Siemens 5SU1356-0DA06 is an FI/LS protector (RCBO) combining a 30 mA residual-current device with a 6 A B-curve miniature circuit breaker in a single 1+N-pole module. The 6 kA breaking capacity covers the fault current rating for most residential and light commercial distribution boards where the prospective short-circuit current stays under that threshold. The AC-type (WS) residual detection handles sinusoidal AC fault currents — the standard for general socket-outlet and lighting circuits without electronic loads that generate pulsed DC faults.
Panel integration notes
The 70 mm depth (D=70MM) and pig-tail connection mean it occupies a standard modular-device width on the DIN rail, with the neutral pig-tail pre-wired for the incoming N busbar. The 1+N-pole format switches both phase and neutral, but the neutral pole is a switched neutral (not a full overcurrent-protected pole) — typical for RCBOs where the overcurrent protection is on the phase only. The B-curve 6 A trips between 3 to 5 times rated current for inductive loads like small motors or fluorescent ballasts; the 30 mA residual threshold protects against direct-contact faults in wet or outdoor circuits.