5SV3346-6 Siemens Current Operated Circuit Breaker 63A 4P 400V 30mA Current Monitoring

5SV3346-6 Siemens Current Operated Circuit Breaker 63A 4P 400V 30mA Current Monitoring

Typical Applications
In residential applications, the 5SV3346-6 is commonly used as the first-level protection device after the main switch. Its high sensitivity of 30 mA can cut off residual currents caused by insulation aging in electric water heaters, water splashes in kitchen sockets, or damaged cables of portable appliances within 40 ms, preventing electric shocks and electrical fires.  Its 6 kA interrupting capacity is sufficient to handle transient surges from power tools, air conditioner compressors, etc., ensuring that the upstream distribution board's circuit breakers (MCBs) and meters are protected.

Key Features
Commercial property owners often install it in data centers, on the output side of UPS systems, or in LED lighting circuits. Its type A tripping characteristic is sensitive to pulsating DC residual currents from high-frequency switching power supplies and dimmers, preventing false or non-tripping due to harmonic distortion.  Its 36 mm single-pole width allows designers to easily integrate 36 independent circuits in a 54-module distribution board.

Key Features
In industrial applications, the 5SV3346-6's vibration and impact resistance are verified according to IEC 68-2-6/27, making it suitable for installation in mobile distribution cabinets in machining workshops or crane control boxes at ports.  Its terminals are pre-coated with anti-oxidation conductive grease, ensuring reliable operation for 10 years in environments with high salt spray or hydrogen sulfide concentrations, such as battery rooms or wastewater treatment plants. Optional auxiliary contacts, fault signal contacts, and shunt trip modules support remote RS-485 or IoT gateway access, enabling "overcurrent + residual current" dual alarm functionality, supporting factories in building ISO 50001 compliant energy management systems.

Product Features
Siemens' TIA Selection Tool and SIMARIS design software include the complete parameters for the 5SV3346-6.  Simply input the load power, cable length, and expected short-circuit current to automatically generate settings, cable cross-section, and selectivity coordination tables. Key Features
The 6 kA interrupting capacity of the 5SV3346-6 covers most distribution transformers under 100 kVA in 230/400V networks, eliminating the need for additional current-limiting fuses.  Its voltage rating is printed with 230V, 240V, 400V, and 415V, complying with the voltage standards of various countries including the UK, Australia, India, and South Africa, preventing incorrect wiring by on-site electricians. The housing is made of halogen-free, flame-retardant PA66, with a glowing wire resistance of 960°C and UL94 V-0 rating.

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