FatafatService Logo
No Image Available

Siemens 2P 40A 30mA RCBO (5SU1356-7KK40) – residential

The Siemens 5SU1356-7KK40 is a 40A, 30mA Type A RCBO engineered for high-reliability residential final circuit protection. This 2P (1P+N) device integrates earth leakage, overload, and short-circuit protection into a compact 36mm width housing. Made in Germany, it serves as the primary safety barrier for household electrical systems operating at 230V.

Quick Answer

Yes, absolutely. The Siemens 5SU1356-7KK40 is a prime choice for homeowners or electricians prioritizing uncompromised electrical safety in India. This German-engineered RCBO combines 30mA earth leakage protection, critical for life safety, with robust overload and short-circuit capabilities, all in a space-saving 2P design. Its quick trip time and high breaking capacity offer peace of mind for modern residential circuits.

✓Rapidly disconnects power during leakage — 30mA Type A sensitivity trips within 300ms at 1x Idn.
✓6kA breaking capacity handles high-energy faults without damaging the internal mechanisms of the 5SU1356-7KK40.
✓Built for longevity in Indian climates — operates reliably in temperatures ranging from -25°C to +55°C.
✓284g compact design fits standard 35mm DIN rails while occupying only 2 modules of space.
✓Enhances safety in case of insulation failure — includes a switched neutral for complete circuit isolation.
✓Halogen-free and RoHS compliant construction ensures no toxic fumes are released during a 960°C glow wire test.

The Siemens 5SU1356-7KK40 is ideal for Indian homeowners and electricians focused on uncompromised residential safety. Offering life-saving 30mA earth leakage protection combined with 40A overload and short-circuit capability, it’s perfect for final circuits. Avoid if your application demands industrial-grade features or a significantly higher amperage.

Product Overview
The Siemens 5SU1356-7KK40 is a 40A, 30mA Type A RCBO engineered for high-reliability residential final circuit protection. This 2P (1P+N) device integrates earth leakage, overload, and short-circuit protection into a compact 36mm width housing. Made in Germany, it serves as the primary safety barrier for household electrical systems operating at 230V.

Related Products

Engineering Analysis
The 30mA sensitivity is vital for life safety, tripping in ≤40ms at 5x rated residual current to prevent cardiac arrest. Its 6kA breaking capacity and 10kA conditional short circuit rating ensure the unit can safely interrupt high-energy faults common in modern residential distribution boards. With a C-trip curve, it allows for temporary current inrushes from appliances while maintaining instantaneous tripping during genuine faults.

Technical Support & FAQs