Siemens 5SN6313-8CN High Breaking Capacity MCB for Small Power Protection 3P 13A

The Siemens 5SN6313-8CN is a robust 3-pole Miniature Circuit Breaker (MCB) engineered for high-performance small power protection in demanding industrial and commercial environments. This 13A device boasts a significant breaking capacity, ensuring superior safety and reliability by swiftly interrupting fault currents. Its advanced design emphasizes operational efficiency, rapid fault clearing, and seamless integration into various electrical distribution systems, making it a prime choice for safeguarding sensitive equipment and personnel.

Product Specifications

| Feature                 | Specification                               |

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

| Product Type            | Miniature Circuit Breaker (MCB)             |

| Siemens Series          | 5SN6                                        |

| Pole Configuration      | 3-Pole                                      |

| Rated Current (In)      | 13 A                                        |

| Breaking Capacity (Icn) | 6 kA (at 230/400V AC)                       |

| Tripping Characteristic | C-Curve                                     |

| Voltage Rating (Un)     | 400 V AC                                    |

| Frequency               | 50/60 Hz                                    |

| Insulation Voltage (Ui) | 500 V AC                                    |

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

| Terminal Type           | Screw Terminals                             |

| Mounting                | DIN Rail (35 mm)                            |

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

Core Features & Market Positioning

The Siemens 5SN6313-8CN distinguishes itself with a high breaking capacity of 6 kA, significantly exceeding the typical requirements for small power circuits. This robust performance ensures that the MCB can safely interrupt potentially damaging fault currents, thereby protecting downstream equipment and preventing widespread system failures. The C-curve tripping characteristic is optimized for industrial applications, providing excellent protection against both overload and short-circuit conditions without nuisance tripping from motor start-up currents. Positioned as a reliable and cost-effective solution, this MCB leverages Siemens' reputation for quality and durability, making it a preferred component for engineers seeking dependable circuit protection. Its design prioritizes ease of installation and maintenance, further enhancing its market appeal in sectors demanding operational continuity and safety.

Key Application Scenarios

This 3-pole MCB is ideally suited for protecting distribution circuits in commercial buildings, industrial facilities, and manufacturing plants. Its 13A rating and C-curve characteristic make it perfect for safeguarding circuits supplying machinery, control panels, and lighting systems where inductive loads or moderate inrush currents are common. The 3-pole configuration ensures complete isolation of all phases during fault conditions, a critical requirement for three-phase systems often found in industrial settings. Applications include protection for small motors, pumps, fans, and HVAC equipment, where reliable and swift fault interruption is paramount to preventing downtime and costly repairs.

Practical System Integration Guidance

Integrating the Siemens 5SN6313-8CN into existing electrical systems is straightforward due to its standard DIN rail mounting and screw terminal connections. For a 3-pole installation, ensure that the incoming and outgoing power lines for all three phases are correctly terminated to the respective terminals, maintaining the phase sequence. Proper wiring is crucial; use conductors of adequate size for the 13A rating to prevent overheating and ensure optimal performance. Before energizing the circuit, conduct thorough visual inspections and continuity tests to confirm correct wiring and prevent short circuits. The MCB's robust housing and clear labeling facilitate quick identification and connection by qualified electricians.

Operation and Risk Mitigation

The Siemens 5SN6313-8CN operates automatically to disconnect the circuit when an overcurrent (overload or short circuit) is detected, safeguarding connected equipment and preventing fire hazards. Users can manually reset the breaker after a fault has been cleared by lifting the operating lever. To mitigate risks, always ensure the MCB is installed in a protected environment, away from excessive moisture or dust, and within its specified operating temperature range. Never attempt to bypass the tripping mechanism or use the MCB as a means to switch loads that exceed its rated capacity. Regular inspection and adherence to electrical safety codes are essential for long-term safe operation.

Scalability & Long-Term Value

The Siemens 5SN6313-8CN MCB, as part of the broader Siemens electrical distribution portfolio, offers excellent compatibility with other Siemens components and systems. This ensures seamless integration and potential for future expansion of electrical infrastructure. While this specific unit is designed for small power protection, its adoption within a Siemens ecosystem allows for cohesive system upgrades and the implementation of advanced monitoring or control solutions in the future, aligning with Industry 4.0 initiatives. Its durable construction guarantees a long service life, minimizing replacement costs and contributing to the overall long-term value of the electrical installation.

Frequently Asked Questions

What is the breaking capacity of the Siemens 5SN6313-8CN?

The Siemens 5SN6313-8CN features a breaking capacity of 6 kA. This rating signifies its ability to safely interrupt fault currents up to 6000 amperes at its specified voltage. It ensures robust protection against severe short circuits.

What does the 'C' in C-curve tripping characteristic mean?

A C-curve tripping characteristic indicates that the MCB will trip between 5 to 10 times its rated current. This makes it suitable for circuits with moderate inductive loads and inrush currents, like small motors.

Can I use the Siemens 5SN6313-8CN for single-phase applications?

Yes, you can use one pole of the Siemens 5SN6313-8CN for single-phase protection. However, it is designed as a 3-pole breaker, meaning it has three poles and is typically used for three-phase circuits.

What is the rated current for this MCB?

The rated current for the Siemens 5SN6313-8CN is 13 Amperes (13A). This is the maximum continuous current the breaker can carry without tripping under normal operating conditions.

Is this MCB suitable for residential use?

While robust, the 5SN6 series with 6kA breaking capacity is generally more suited for commercial and industrial small power applications. Residential applications might use breakers with different specifications depending on local codes.

How do I install the Siemens 5SN6313-8CN?

Install it on a standard 35mm DIN rail. Ensure correct connection of the three phases to the input and output terminals. Use appropriately sized conductors.

What safety standards does this MCB comply with?

This MCB complies with IEC 60898-1 and IEC 60947-2 standards. These ensure its safety, performance, and reliability in electrical installations.

What is the voltage rating of the Siemens 5SN6313-8CN?

The nominal voltage rating (Un) for this MCB is 400V AC. It is designed to operate safely within this voltage range for AC power systems.

When would I choose a 3-pole MCB over a 1-pole or 2-pole?

A 3-pole MCB is essential for protecting three-phase loads. It ensures all phases are disconnected simultaneously during a fault, preventing phase imbalance and damage.

What is the operational temperature range for this MCB?

The Siemens 5SN6313-8CN can operate reliably within a temperature range of -25°C to +45°C. Ensure the installation environment is within these limits for optimal performance.