Siemens 5SN6116-8CN High Reliability Miniature Circuit Breaker 1P 16A

The Siemens 5SN6116-8CN is a single-pole, 16-amp miniature circuit breaker (MCB) engineered for high reliability and robust protection in diverse electrical installations. This MCB offers advanced tripping characteristics, ensuring rapid and precise disconnection of circuits under fault conditions, thereby safeguarding equipment and personnel. Its compact design and DIN rail mounting facilitate seamless integration into various electrical panels and systems. With a breaking capacity of 6 kA, it is well-suited for residential, commercial, and light industrial applications where dependable circuit protection is paramount.

Product Specifications

| Specification         | Value                                |

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

| Manufacturer          | Siemens                              |

| Product Series        | 5SN6                             |

| Product Type          | Miniature Circuit Breaker (MCB)      |

| Poles                 | 1P (Single Pole)                     |

| Rated Current (In)    | 16 A                                 |

| Breaking Capacity (Icn) | 6 kA                                 |

| Voltage Rating (Un)   | 230/400 V AC                         |

| Tripping Curve        | C                                    |

| Frequency             | 50/60 Hz                             |

| Protection Type       | Overcurrent and Short Circuit        |

| Mounting Type         | DIN Rail                             |

| Terminal Type         | Screw Terminal                       |

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

| Degree of Protection  | IP20                                 |

| Standards Compliance  | IEC/EN 60898-1                       |

Core Features & Market Positioning

The Siemens 5SN6116-8CN stands out in the market due to its unwavering commitment to reliability, a cornerstone of Siemens' electrical engineering legacy. Its high breaking capacity of 6 kA makes it a robust solution for managing fault currents, offering superior protection compared to lower-rated breakers. The C-curve tripping characteristic is optimized for applications with moderate inrush currents, such as lighting and motor loads, providing sensitive overcurrent protection without nuisance tripping. This positions the 5SN6116-8CN as a preferred choice for electricians and system designers prioritizing safety, longevity, and compliance with stringent international standards like IEC/EN 60898-1. Its compact form factor further enhances its appeal by maximizing space within distribution boards.

Key Application Scenarios

This 1P 16A MCB is extensively utilized in residential electrical distribution boards to protect individual circuits for lighting, sockets, and small appliances. In commercial settings, it's ideal for safeguarding circuits in office spaces, retail environments, and small workshops, ensuring the integrity of power supply to essential equipment. For light industrial applications, the Siemens 5SN6116-8CN provides reliable overcurrent and short-circuit protection for control circuits, auxiliary power supplies, and small machinery, where its 6 kA breaking capacity offers an essential layer of safety. Its application extends to solar power installations for DC circuit protection (where applicable and certified) and in backup power systems to ensure stable power delivery.

Practical System Integration Guidance

Integrating the Siemens 5SN6116-8CN into existing or new electrical systems is straightforward due to its standard DIN rail mounting mechanism and robust screw terminals. Ensure that the incoming and outgoing conductors are properly sized for the 16A rating and securely fastened to prevent loose connections, which can lead to overheating and failure. Before commissioning, verify that the circuit's expected load and potential fault currents do not exceed the MCB's 6 kA breaking capacity and 230/400 V AC rating. Proper grounding and bonding practices must be maintained throughout the installation to ensure effective fault current path and safety. Always adhere to local electrical codes and regulations during installation.

Operation and Risk Mitigation

The Siemens 5SN6116-8CN operates by automatically interrupting the electrical circuit when it detects an overcurrent exceeding its rated limit, whether from an overload or a short circuit. This rapid disconnection is crucial for preventing damage to connected equipment, wiring, and mitigating fire hazards. To mitigate risks, regular inspection of the MCB for signs of wear, discoloration, or damage is recommended. If a circuit trips frequently, it indicates a persistent issue such as an overloaded circuit, a short circuit, or a faulty appliance, necessitating a thorough investigation rather than repeatedly resetting the breaker. Over-reliance on manually resetting a tripped breaker without identifying the root cause significantly increases the risk of electrical fire or equipment damage.

Scalability & Long-Term Value

The Siemens 5SN6116-8CN offers excellent long-term value through its durable construction and compatibility with the broader Siemens ALPHA LINE and other compliant DIN rail mounting systems. While this specific unit is a single-pole breaker, Siemens' extensive range of modular protective devices allows for easy system expansion and upgrades, from adding more circuits to incorporating RCDs (Residual Current Devices) or surge protection devices alongside it. Its robust design ensures a long operational lifespan, minimizing the need for premature replacement. For future-proofing, its integration into smart home or building management systems can be facilitated through compatible smart metering and control components, enabling remote monitoring and management of electrical loads.

Frequently Asked Questions (FAQs)

Q1: What is the tripping curve of the Siemens 5SN6116-8CN?

The Siemens 5SN6116-8CN features a Type C tripping curve. This curve is designed to handle moderate inrush currents. It provides protection against overcurrents and short circuits. Type C breakers typically trip between 5 to 10 times the rated current.

Q2: Can the Siemens 5SN6116-8CN be used for motor protection?

Yes, the Type C curve is suitable for circuits with inductive loads like small motors. It accounts for the higher current drawn when a motor starts. However, for larger motors, dedicated motor protection devices might be more appropriate.

Q3: What is the breaking capacity of this MCB?

This MCB has a breaking capacity of 6 kA. This is the maximum fault current it can safely interrupt. It is suitable for many residential and commercial applications.

Q4: Is the Siemens 5SN6116-8CN suitable for DC circuits?

Generally, AC MCBs like the 5SN6116-8CN are not rated for DC circuits. Using an AC breaker on a DC circuit can lead to dangerous arcing. Specific DC-rated breakers must be used for DC applications.

Q5: What is the voltage rating of the 5SN6116-8CN?

This circuit breaker is rated for 230/400 V AC. It is designed for standard single-phase and three-phase power systems. Always ensure your system voltage is within this range.

Q6: How do I install the Siemens 5SN6116-8CN?

Install it on a standard 35mm DIN rail. Ensure terminals are securely connected to the conductors. Follow local electrical codes for proper wiring.

Q7: What is the purpose of the "8CN" in the product number?

The "8CN" designation typically refers to specific product variants or packaging. It often signifies a particular market or configuration. For detailed specifics, one would consult the Siemens product catalog.

Q8: What are common troubleshooting steps for a tripped 5SN6116-8CN?

First, identify the cause of the trip – overload or short circuit. Disconnect faulty appliances or loads. Then, reset the breaker by pushing the lever firmly up.

Q9: Can this MCB be used in extreme temperatures?

It operates reliably between -25°C and +45°C. Performance may be affected outside this range. Avoid installation in environments with extreme temperature fluctuations.

Q10: What standards does the Siemens 5SN6116-8CN comply with?

It complies with IEC/EN 60898-1 standards. These are international safety and performance requirements for MCBs. This ensures its reliability and suitability for various markets.