Siemens
Siemens 5SU RCBO 1P+N 16–40 A C-Curve 30mA 10 kA | Earth Leakage + MCB in One
Siemens 5SU RCBO 1P+N 16–40 A C-Curve 30mA 10 kA | Earth Leakage + MCB in One
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The Siemens 5SU is a 1P+N 16–40 A C-curve RCBO with 30 mA earth-leakage sensitivity and 10 kA breaking capacity. It combines a miniature circuit breaker and a residual current device in one module, protecting the circuit against overload, short circuit and dangerous earth-leakage currents, and saving space in the distribution board.
Key features
- Overload, short-circuit and earth-leakage protection in one device
- 30 mA sensitivity – protection of people against electric shock
- Individual protection per circuit – a fault trips only the affected circuit
- Test button for periodic checking
- DIN-rail mounting and compact width
Technical specifications
| Brand | Siemens |
|---|---|
| Part number / model | 5SU |
| Device type | RCBO (RCD + MCB in one device) |
| Number of poles | 1P+N |
| Rated current | 16–40 A |
| Tripping curve | C curve |
| Sensitivity (IΔn) | 30 mA |
| Breaking capacity | 10 kA |
| Rated voltage | 230 V AC, 50/60 Hz |
| Standard | IEC/EN 61009-1 |
Available versions
Current Rating: 16A, 20A, 25A, 32A, 40A.
Typical applications
- Bathroom, kitchen and water-heater circuits
- Outdoor sockets, gardens and swimming pools
- Individual protection of air-conditioner and socket circuits
- Villas, apartments, clinics and offices
Selection and installation tips
Choose the RCBO rating according to the cable size of the circuit, as for an MCB, and use 30 mA sensitivity for socket and wet-area circuits. Using an RCBO per circuit avoids total blackout of the apartment when one appliance leaks.
Frequently asked questions
What is the difference between an RCBO and an RCCB?
An RCCB only detects earth leakage; an RCBO adds overload and short-circuit protection, so it can replace an MCB + RCCB combination for a single circuit.
Where is the Siemens 5SU typically installed?
On circuits feeding water heaters, bathrooms, kitchens, outdoor sockets and air conditioners where both overcurrent and shock protection are needed.
Buy Siemens 5SU in Egypt
Spark Egypt is a trusted source for original Siemens products such as the 5SU residual current breaker with overcurrent protection (RCBO), serving contractors, OEMs, panel builders, facility managers and home owners with tax invoices and fast delivery to Cairo, Giza, New Cairo, 6th of October, Sheikh Zayed, the New Administrative Capital, Alexandria, the Delta, the Canal cities and Upper Egypt. Contact our sales team to confirm selection, compatible accessories and project pricing.
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