Siemens 5SV3347-4 Miniature Circuit Breaker 4P 80A 30mA

The Siemens 5SV3347-4 Miniature Circuit Breaker (MCB) stands as a robust solution for reliable overcurrent protection in demanding electrical installations. This 4-pole, 80A, 30mA residual current device (RCD) offers superior safety and operational continuity, making it a preferred choice for engineers and specifiers. Its key advantages include high breaking capacity, enhanced trip sensitivity, and seamless integration into standard distribution boards.

Product Specifications

| Parameter             | Value                                |

| :-------------------- | :----------------------------------- |

| Manufacturer          | Siemens                               |

| Product Series        | 5SV3                                 |

| Number of Poles       | 4                                    |

| Rated Current (In)    | 80 A                                 |

| Rated Residual Current | 30 mA                                |

| Tripping Characteristic | Type A                               |

| Breaking Capacity (Icn) | 6 kA                                 |

| Voltage Rating (Ue)   | 400 V AC                             |

| Frequency             | 50/60 Hz                             |

| Terminal Type         | Screw Terminal                       |

| Mounting Type         | DIN Rail                             |

| Ambient Temperature   | -25°C to +45°C                       |

| Protection Class      | IP20 (Enclosure), IP40 (Installed) |

| Compliance Standards  | IEC/EN 61009-1, IEC/EN 60898-1       |

Core Features & Market Positioning

The Siemens 5SV3347-4 MCB distinguishes itself through its high breaking capacity of 6 kA, ensuring safe interruption of fault currents and minimizing damage to downstream equipment. Its Type A tripping characteristic offers protection against AC and pulsating DC fault currents, a critical feature in modern industrial environments where complex machinery is prevalent. This MCB is positioned as a dependable, cost-effective solution for applications requiring robust residual current protection without compromising on performance or safety standards. The dual certification under IEC/EN 61009-1 and IEC/EN 60898-1 underscores its versatility and compliance with international safety regulations.

Key Application Scenarios

This 4-pole, 80A MCB is ideally suited for protecting main distribution circuits in commercial buildings, industrial facilities, and data centers. Its 30mA residual current sensitivity makes it effective for personnel protection against indirect contact, particularly in areas with increased risk of electric shock, such as workshops and areas with damp conditions. The 80A rating accommodates substantial load currents, making it suitable for main incomers or feeders for large machinery and distribution panels. Its application extends to protecting sensitive electronic equipment from dangerous leakage currents, ensuring operational integrity.

Practical System Integration Guidance

Integrating the Siemens 5SV3347-4 MCB into existing electrical systems is straightforward due to its standard DIN rail mounting and screw terminal connections. Ensure the main power supply is de-energized before installation. Connect the incoming phase and neutral conductors to the designated terminals, typically on the top. The outgoing phase and neutral conductors for the protected circuit should be connected to the lower terminals. It is crucial to adhere to local electrical codes and best practices for wiring, ensuring proper conductor sizing and torque. For 4-pole applications, ensure all four poles are correctly wired to provide comprehensive protection and isolation.

Operation and Risk Mitigation

The Siemens 5SV3347-4 MCB operates by continuously monitoring the balance of current flowing through the live and neutral conductors. If an imbalance, indicative of a leakage current to earth, exceeds the 30mA threshold, the device rapidly trips, interrupting the circuit. This significantly reduces the risk of electric shock and fire hazards. Regular testing of the RCD function using a dedicated test button or external tester is recommended to ensure its continued operational integrity. Proper installation and adherence to the specified voltage and current ratings are paramount to prevent premature failure or hazardous situations.

Scalability & Long-Term Value

While the 5SV3 series offers robust performance, Siemens' broader product ecosystem allows for scalable solutions. Compatibility with other Siemens circuit protection devices and switchgear facilitates system expansion. For future-proofing, consider integrating these MCBs within intelligent distribution boards that can interface with building management systems or IIoT platforms, enabling remote monitoring and diagnostics. The inherent durability and compliance with international standards ensure long-term value and reduced maintenance requirements throughout the operational life of the installation.

FAQs

Q1: What is the breaking capacity of the Siemens 5SV3347-4?

The Siemens 5SV3347-4 MCB features a robust breaking capacity of 6 kA. This ensures it can safely interrupt high fault currents. It is crucial for preventing severe damage to electrical systems.

Q2: Can this MCB be used for DC circuits?

This specific MCB, the 5SV3347-4, is designed for AC circuits. It is not suitable for direct DC applications. Its residual current protection is optimized for AC and pulsating DC leakage currents.

Q3: What does "4P" signify in the product name?

"4P" indicates that the circuit breaker has four poles. This means it can simultaneously switch all live conductors and the neutral conductor. It is essential for installations requiring complete isolation.

Q4: What is the significance of 30mA residual current sensitivity?

A 30mA sensitivity is standard for personal protection against electric shock. It trips quickly when leakage current exceeds this safe threshold. This minimizes the risk of injury from indirect contact.

Q5: How do I test the RCD function of the 5SV3347-4?

The device includes a test button for manual RCD function checks. It is recommended to perform these tests periodically. Ensure the circuit is energized when performing the test.

Q6: What are the typical applications for an 80A 4-pole MCB?

This MCB is suitable for main incomers or large distribution circuits. Applications include industrial machinery, commercial building power distribution, and data center power panels. It handles substantial current loads.

Q7: Is the Siemens 5SV3347-4 compliant with international standards?

Yes, this MCB is compliant with IEC/EN 61009-1 and IEC/EN 60898-1 standards. These certifications ensure it meets rigorous international safety and performance requirements for circuit protection.

Q8: What type of tripping characteristic does this MCB have?

The Siemens 5SV3347-4 has a Type A tripping characteristic. This provides protection against AC and pulsating DC residual currents. It is more versatile than Type AC for many modern applications.

Q9: How should I wire the Siemens 5SV3347-4 MCB?

Wire incoming power to the top terminals and outgoing circuits to the bottom terminals. Ensure correct phase and neutral connections for all four poles. Always de-energize the circuit before wiring.

Q10: What is the operational temperature range for this MCB?

This circuit breaker can operate reliably within an ambient temperature range of -25°C to +45°C. Maintaining this range is essential for consistent performance and longevity. Avoid extreme environmental conditions.