Siemens 5SN6208-8CN High Breaking Capacity Miniature Circuit Breaker 2P 8A
The Siemens 5SN6208-8CN is a high-performance, 2-pole miniature circuit breaker (MCB) designed for robust protection in demanding industrial and commercial applications. With a breaking capacity of 6kA and a rated current of 8A, this MCB offers superior overcurrent and short-circuit protection, ensuring the safety and reliability of electrical installations. Its advanced tripping mechanism and durable construction make it a vital component for safeguarding sensitive equipment and personnel.
Product Specifications
| Feature | Specification |
| :---------------------- | :--------------------- |
| Product Type | Miniature Circuit Breaker |
| Model Number | 5SN6208-8CN |
| Number of Poles | 2 |
| Rated Current (In) | 8A |
| Breaking Capacity (Icn) | 6kA |
| Tripping Curve | C |
| Voltage Rating | 230/400V AC |
| Frequency | 50/60 Hz |
| Terminal Type | Screw Terminal |
| Mounting Type | DIN Rail |
| IP Protection | IP20 |
| Ambient Temperature | -25°C to +45°C |
| Standards Compliance | IEC/EN 60898-1 |
Core Features & Market Positioning
The Siemens 5SN6208-8CN stands out in the market due to its exceptional breaking capacity, rated at 6kA, which provides a high level of protection against severe fault currents often encountered in industrial settings. This robust performance, combined with the reliable C-curve tripping characteristic, ensures swift disconnection under inductive load conditions, preventing damage to connected equipment and mitigating fire hazards. Siemens' reputation for quality and durability further solidifies its position as a trusted choice for professionals demanding dependable circuit protection. The MCB's construction prioritizes safety and longevity, offering peace of mind in critical infrastructure and manufacturing environments.
Key Application Scenarios
This 2-pole, 8A MCB is ideally suited for a wide array of applications, including the protection of motor circuits, lighting systems, and distribution boards in commercial buildings and industrial facilities. Its 6kA breaking capacity makes it particularly valuable for installations where higher fault currents are anticipated, such as in manufacturing plants or areas with substantial power distribution networks. The C-curve tripping characteristic is well-suited for loads with moderate inrush currents, such as fluorescent lighting or small motors, ensuring reliable operation without nuisance tripping. It is also commonly deployed in control panels and electrical enclosures where precise and dependable overcurrent protection is paramount.
Practical System Integration Guidance
Integrating the Siemens 5SN6208-8CN into existing electrical systems is straightforward, owing to its standard 2-pole configuration and DIN rail mounting capability. For installation, ensure the main power supply is de-energized. Connect the line conductor to the upper terminal and the load conductor to the lower terminal on one pole, and repeat for the second pole. Ensure proper torque is applied to the screw terminals to maintain secure connections and prevent overheating. The MCB's compact design allows for efficient use of space within distribution boards and control cabinets. Compatibility with standard busbars facilitates seamless integration with other protective devices and components.
Operation and Risk Mitigation
The Siemens 5SN6208-8CN operates by automatically interrupting the electrical circuit when an overcurrent or short-circuit condition is detected, safeguarding electrical equipment and preventing potential hazards like fires. The mechanism is designed for high reliability, ensuring immediate response to fault conditions. In the event of nuisance tripping, first, verify that the connected load does not exceed the 8A rating or that the inrush current is within the C-curve's tolerance. Always ensure that the MCB is correctly rated for the circuit it protects and that all connections are secure and properly insulated to prevent electrical shock and ensure safe operation.
Scalability & Long-Term Value
The Siemens 5SN6208-8CN offers excellent long-term value through its robust design and compatibility with the broader Siemens industrial automation ecosystem. While this specific model provides a fixed rating, its integration into modular DIN rail systems allows for straightforward replacement or upgrade to higher-rated breakers or specialized protection devices as system demands evolve. Its adherence to international standards ensures interoperability with a wide range of components from various manufacturers, future-proofing installations. For facilities embracing Industry 4.0, Siemens offers advanced circuit protection solutions with communication capabilities, and the 5SN series serves as a reliable foundation for such sophisticated electrical architectures.
Frequently Asked Questions
What is the breaking capacity of the Siemens 5SN6208-8CN?
This MCB features a substantial breaking capacity of 6kA. This rating indicates its ability to safely interrupt fault currents up to this level without sustaining damage. It's a crucial specification for ensuring safety in environments with potential for high fault currents.
What type of loads is the C-curve tripping characteristic suitable for?
The C-curve is designed for circuits with moderate inrush currents. This makes it ideal for inductive loads like motors, transformers, and fluorescent lighting ballasts. It prevents nuisance tripping during normal startup but still provides protection against overloads.
How do I properly install the Siemens 5SN6208-8CN MCB?
Ensure the power supply is completely disconnected before installation. Mount the MCB on a standard DIN rail, then connect the line conductor to the upper terminal and the load conductor to the lower terminal for each pole. Tighten the screw terminals securely to the manufacturer's recommended torque specification.
Can the Siemens 5SN6208-8CN be used for DC circuits?
No, the Siemens 5SN6208-8CN is designed and rated exclusively for AC circuits. Using it on DC circuits can lead to unpredictable performance and a failure to interrupt the current properly, posing significant safety risks.
What does "2P" mean in the product name?
"2P" signifies that the miniature circuit breaker has two poles. This means it can simultaneously switch and protect two separate conductors, typically used for single-phase circuits where both line and neutral conductors require protection.
What is the rated current of this circuit breaker?
The rated current, indicated as 8A, is the maximum continuous current the circuit breaker can carry under normal operating conditions without tripping. It's essential to match this rating to the expected load of the circuit being protected.
Is this MCB compatible with other Siemens protection devices?
Yes, the 5SN6208-8CN is designed for seamless integration within Siemens' comprehensive electrical distribution systems. It adheres to standard mounting and connection principles, ensuring compatibility.
What standards does the Siemens 5SN6208-8CN comply with?
This circuit breaker complies with IEC/EN 60898-1 standards. This ensures it meets stringent international safety and performance requirements for residential, commercial, and light industrial applications.
What are the dimensions and mounting requirements?
The 5SN6208-8CN is designed for standard 35mm DIN rail mounting. Its compact dimensions ensure efficient space utilization within electrical panels and enclosures, facilitating easy installation.
How can I troubleshoot nuisance tripping with this MCB?
First, verify that the connected load does not exceed the 8A rating. Check for potential overloads or short circuits. If the load has high inrush currents, ensure it's compatible with the C-curve characteristic.
