The Siemens 5SU9336-7CR16 is a combined residual-current circuit breaker with overcurrent protection (RCBO) in a 1P+N form factor, rated for 230 V AC. It integrates a Type A residual-current device (RCD) sensitive to pulsating DC and sinusoidal AC fault currents, tripping at 30 mA, with a C‑characteristic overcurrent release set at 16 A. The breaking capacity is 6 kA (Icn), which is the standard for residential and light commercial final circuits where the prospective short-circuit current at the point of installation does not exceed that level.
What the ratings mean for fit
The Type A RCD (30 mA) covers sinusoidal AC and pulsating DC fault currents — the common profile for modern electronic loads such as washing machines, LED drivers, and variable-speed pumps. The C‑characteristic (16 A) means the magnetic trip operates at 5–10× In (80–160 A), suited for loads with moderate inrush, like small motors or capacitor-start circuits. The 6 kA breaking capacity is adequate for most final subcircuits in TN and TT systems where the upstream protective device limits the fault energy. The 1P+N format (switched phase, switched neutral) occupies one module width on a DIN rail, saving panel space compared to a two-module MCB+RCCB pair.
Deployment context
Snap-on mounting to a 35 mm DIN rail (EN 60715) in a distribution board or consumer unit. The 1P+N width means it fits a single 18 mm module, so it replaces a separate MCB and RCCB in the same rail position. Rated for 230 V AC only; not for three-phase or 400 V line-to-line circuits.