Siemens 5SN6413-8CN High Breaking Capacity Motor Circuit Protection MCB 4P 13A

The Siemens 5SN6413-8CN is a robust, 4-pole Miniature Circuit Breaker (MCB) designed for high-performance motor protection. Engineered with a breaking capacity of 13kA, this device offers superior circuit protection against overloads and short circuits, safeguarding valuable motor assets and ensuring operational continuity in demanding industrial environments. Its advanced tripping mechanism and reliable construction make it a cornerstone for electrical safety and efficiency.

Product Specifications

| Feature                 | Specification                               |

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

| Product Type            | Motor Circuit Protection MCB                |

| Manufacturer            | Siemens                                     |

| Model Number            | 5SN6413-8CN                                 |

| Poles                   | 4                                           |

| Rated Current (In)      | 13 A                                        |

| Breaking Capacity (Icn) | 10 kA (at 230/400V AC)                      |

| Tripping Characteristic | C-Type (for motor starting currents)        |

| Voltage Rating (Ue)     | 400V AC                                     |

| Frequency               | 50/60 Hz                                    |

| Insulation Voltage (Ui) | 500V AC                                     |

| Impulse Withstand (Uimp)| 4 kV                                        |

| Protection Class        | IP20                                        |

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

| Mounting Type           | DIN Rail (35mm)                             |

| Compliance Standards    | IEC/EN 60947-2, IEC/EN 60898-1              |

Core Features & Market Positioning

The Siemens 5SN6413-8CN distinguishes itself with its high breaking capacity (10kA at 400V AC), crucial for industrial applications where significant inrush currents from motor startups are common. Its C-type tripping characteristic is specifically tailored to accommodate these transient overcurrents without nuisance tripping, while still providing rapid and effective protection against sustained overloads and dangerous short circuits. This dual-functionality positions the 5SN6413-8CN as a reliable and efficient solution for motor protection, offering a superior balance of sensitivity and robustness compared to standard MCBs. The robust construction and adherence to stringent IEC/EN standards underscore its durability and safety, making it a trusted choice in sectors demanding high reliability.

Key Application Scenarios

This 4-pole, 13A MCB is ideally suited for protecting three-phase motors in a variety of industrial settings. Common applications include the safeguarding of pumps, fans, compressors, conveyors, and machine tools where motor reliability is paramount. Its suitability extends to control panels, distribution boards, and electrical enclosures designed for the manufacturing, processing, and automation industries. The 5SN6413-8CN effectively prevents equipment damage and minimizes downtime by providing precise overcurrent and short-circuit protection for individual motor circuits, ensuring the smooth operation of essential industrial machinery.

Practical System Integration Guidance

Integrating the Siemens 5SN6413-8CN into existing electrical systems is straightforward due to its standard 35mm DIN rail mounting. For proper installation, ensure the MCB is securely fastened to the rail. Wiring connections should be made to the designated terminals, paying close attention to the correct polarity for three-phase circuits. The line (input) connections should be at the top and the load (output) connections at the bottom. Always verify that the incoming supply voltage and frequency are within the MCB's rated specifications (400V AC, 50/60 Hz). Before energizing, double-check all connections for tightness and ensure the ambient temperature is within the operational range (-25°C to +45°C) to guarantee optimal performance and longevity.

Operation and Risk Mitigation

The Siemens 5SN6413-8CN operates automatically, interrupting the circuit when the current exceeds its rated limit for a specified duration or when a dangerous short-circuit current is detected. The C-type characteristic ensures it tolerates the high inrush currents typical of motor starting, preventing premature tripping. To mitigate risks, always ensure the MCB is correctly rated for the motor's full load current and starting characteristics. Never bypass or tamper with the internal tripping mechanisms. Regular visual inspection for damage and ensuring clean terminal connections are recommended. In the event of a trip, identify the cause of the overcurrent or short circuit before resetting the breaker. If tripping occurs frequently without an apparent external fault, it may indicate an internal motor issue or an undersized breaker.

Scalability & Long-Term Value

The 5SN6413-8CN MCB is designed for integration within broader Siemens industrial electrical systems, offering inherent compatibility with other Siemens circuit protection devices and control components. While the MCB itself is a fixed-rating device, its value is realized through its reliability and protection of connected assets, extending their operational lifespan. For system scalability, Siemens offers a wide range of MCBs and related switchgear that can accommodate increasing power demands or additional motor circuits. Furthermore, its robust design ensures long-term operational stability, minimizing the need for premature replacement and contributing to a lower total cost of ownership.

Frequently Asked Questions

What is the primary function of the Siemens 5SN6413-8CN MCB?

This MCB is specifically engineered for motor circuit protection. It provides essential safeguarding against overcurrents and short circuits. Its design prioritizes protecting motor windings and connected electrical components from damage.

It ensures operational continuity by preventing thermal damage and electrical faults. The MCB offers a reliable solution for industrial motor applications.

The device's primary role is to maintain system integrity and prevent costly downtime. Its robust construction ensures dependable operation across various industrial environments.

What does the "C-Type" tripping characteristic signify for this motor circuit breaker?

A C-type characteristic means the breaker is designed to handle higher inrush currents. This is common when motors start up. It allows for a certain level of temporary overcurrent without tripping.

This characteristic prevents nuisance tripping during normal motor starting sequences. However, it still trips quickly for sustained overloads or short circuits. This balances protection and operational convenience for motor loads.

It is optimized for inductive loads like motors, offering a wider operational window compared to B or K type breakers. This makes it suitable for applications with moderate starting currents.

How does the 10kA breaking capacity of the Siemens 5SN6413-8CN protect my equipment?

The 10kA breaking capacity indicates the maximum fault current the MCB can safely interrupt. This ensures that during a severe short circuit, the breaker will trip and safely break the circuit. It prevents the arc energy from causing further damage.

This high breaking capacity is crucial in industrial settings where fault currents can be significantly higher. It protects downstream equipment, wiring, and the electrical infrastructure from catastrophic damage. It ensures personnel safety during fault events.

By interrupting faults rapidly and safely, this capacity minimizes the risk of fire and extensive equipment destruction. It is a key safety feature for reliable motor operation in demanding environments.