Siemens 5SN6316-8CN Type C High Breaking Capacity Circuit Breaker 3P 16A

The Siemens 5SN6316-8CN is a Type C, 3-pole, 16A high breaking capacity circuit breaker designed for robust protection in demanding industrial and commercial applications. This miniature circuit breaker (MCB) offers superior performance with a breaking capacity of 6 kA, ensuring reliable interruption of fault currents and safeguarding electrical installations. Its Type C tripping characteristic makes it ideal for circuits with moderate inductive loads, providing sensitive protection against overcurrents while minimizing nuisance tripping from inrush currents. The 5SN6316-8CN is engineered for exceptional durability and safety, adhering to stringent international standards.

Product Specifications

| Feature                 | Specification                                |

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

| Product Type            | Miniature Circuit Breaker (MCB)              |

| Manufacturer            | Siemens                                      |

| Series                  | 5SN6                                         |

| Model Number            | 5SN6316-8CN                                  |

| Number of Poles         | 3                                            |

| Rated Current (In)      | 16 A                                         |

| Tripping Characteristic | Type C                                       |

| Breaking Capacity (Icn) | 6 kA                                         |

| Rated Voltage (Un)      | 230/400 V                                    |

| Frequency               | 50/60 Hz                                     |

| Protection Class        | IP20 (device), IP40 (enclosure)              |

| Terminal Type           | Screw terminals                              |

| Mounting Type           | DIN rail (35 mm)                             |

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

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

Core Features & Market Positioning

The Siemens 5SN6316-8CN distinguishes itself through its high breaking capacity of 6 kA, offering a robust defense against severe short-circuit events, a critical requirement in industrial settings where fault currents can be substantial. Its Type C tripping curve is a significant advantage, providing optimal protection for circuits with moderate inductive loads, such as motors and transformers, by allowing for higher inrush currents without immediate tripping, thus preventing operational disruptions. This MCB's reliable performance and adherence to IEC/EN standards position it as a dependable choice for electrical engineers and facility managers seeking safety and operational continuity.

Key Application Scenarios

This Siemens circuit breaker is exceptionally well-suited for protecting motor circuits, transformers, and other inductive loads commonly found in industrial manufacturing plants and large commercial buildings. Its 6 kA breaking capacity ensures safety in areas with potentially high fault levels, such as power distribution panels in factories and workshops. The Type C characteristic is specifically beneficial for preventing nuisance tripping in applications where equipment experiences temporary high current surges during startup, thus maintaining consistent operational uptime for critical machinery. It is an integral component in panel building and electrical distribution systems requiring reliable overcurrent and short-circuit protection.

Practical System Integration Guidance

Integrating the Siemens 5SN6316-8CN into existing electrical systems is straightforward due to its standard 35 mm DIN rail mounting. Ensure that the ambient temperature is within the operating range of -25°C to +45°C for optimal performance. The circuit breaker is designed for easy connection via screw terminals, accommodating standard conductor sizes. When wiring, always ensure the power is isolated and adhere to local electrical codes and regulations. For 3-pole applications, connect all three phases to the respective terminals to ensure complete isolation and protection across all conductors during a fault event.

Operation and Risk Mitigation

The primary function of the Siemens 5SN6316-8CN is to interrupt electrical circuits automatically when an overcurrent or short circuit is detected, thereby preventing damage to connected equipment and mitigating fire hazards. Its Type C characteristic means it will trip at currents between 5 and 10 times the rated current, offering a balance between sensitive protection and tolerance for inrush currents. Regular visual inspection and periodic testing, in accordance with maintenance schedules, are crucial for ensuring its continued reliable operation and mitigating risks associated with electrical faults.

Scalability & Long-Term Value

The Siemens 5SN6316-8CN, as part of Siemens' broader industrial electrical portfolio, offers significant long-term value through its compatibility with other Siemens protection and automation devices. Its standard DIN rail mounting and terminal configurations ensure it can be seamlessly integrated into existing or future panel builds and distribution boards. While this specific model focuses on robust circuit protection, its inclusion in a Siemens system allows for potential future upgrades to more advanced monitoring or control solutions within the Siemens ecosystem, supporting the evolution towards smarter, more connected industrial environments.

Frequently Asked Questions

What is the breaking capacity of the Siemens 5SN6316-8CN?

The Siemens 5SN6316-8CN boasts a high breaking capacity of 6 kA. This rating signifies its ability to safely interrupt fault currents up to 6,000 Amperes. It ensures robust protection against severe short-circuit events in industrial environments.

This substantial breaking capacity is critical for preventing catastrophic damage to electrical installations and connected equipment. It provides a significant safety margin in areas with potentially high fault current levels.

A 6 kA breaking capacity is a key indicator of the circuit breaker's robustness and reliability under fault conditions. It meets stringent international safety standards for electrical protection devices.

What does Type C tripping characteristic mean for this breaker?

A Type C tripping characteristic means the circuit breaker will trip when the current reaches 5 to 10 times its rated current (16A). This makes it suitable for circuits with moderate inductive loads. It allows for higher inrush currents without nuisance tripping.

This characteristic is ideal for applications involving motors, transformers, and fluorescent lighting ballasts. These devices often experience temporary high current surges during startup or operation. The Type C curve balances protection sensitivity with operational continuity.

By not tripping on typical inrush currents, the Type C breaker ensures the reliable operation of connected equipment. It still provides rapid protection against dangerous short-circuit currents.

Can the Siemens 5SN6316-8CN be used for domestic applications?

While technically capable, the Siemens 5SN6316-8CN with its 6 kA breaking capacity and Type C characteristic is primarily designed for industrial and commercial use. Domestic applications typically require lower breaking capacities and Type B or Type C characteristics depending on the load.

Using a breaker with a higher breaking capacity than required for a domestic setting is not necessarily detrimental but may be overkill and less cost-effective. Standard domestic installations have lower fault current potentials.

It is always recommended to select a circuit breaker that matches the specific protection requirements and fault current levels of the installation, adhering to local electrical codes for domestic safety.