The Siemens 5SU9336-7CN50 is a 1P+N RCBO rated at 6 kA Icn, Type A, 30 mA residual sensitivity, C-characteristic, 50 A rated current, and 230 V AC nominal voltage. The Type A trip detects pulsating DC residual currents (common in electronics and LED lighting) in addition to sinusoidal AC, so it covers modern mixed-load panels that a basic AC-type RCD would miss. The 30 mA sensitivity is the standard for personal shock protection in residential and office installations (IEC 60364). The C-curve (5–10× In) handles inrush from motorized loads like pumps or compressors without nuisance tripping, while the 50 A rating suits high-demand circuits such as cookers, showers, or sub-mains.
The 1P+N form factor occupies a single module width, so it fits tight retrofit slots. The load-side neutral is switched internally — no separate neutral bar needed downstream, which simplifies wiring in split-load boards.