Siemens 5SN6208-7CN Protection Circuit Breaker (MCB) 2P 8A
The Siemens 5SN6208-7CN Protection Circuit Breaker (MCB) 2P 8A is a vital component for safeguarding electrical installations against overcurrents and short circuits, ensuring operational reliability and personnel safety. This 2-pole, 8-ampere Miniature Circuit Breaker (MCB) from Siemens' 5SN6 series offers robust protection, featuring a high breaking capacity and Type C tripping characteristic, making it suitable for a wide range of industrial and commercial applications. Its compact design facilitates easy integration into standard electrical panels.
Product Specifications
| Feature | Specification |
| :-------------------------- | :---------------------- |
| Product Type | Miniature Circuit Breaker (MCB) |
| Manufacturer | Siemens |
| Series | 5SN6 |
| Poles | 2P |
| Rated Current (In) | 8 A |
| Tripping Characteristic | Type C |
| Rated Breaking Capacity (Icn) | 6 kA |
| Voltage Rating (Un) | 400V AC |
| Frequency | 50/60 Hz |
| Degree of Protection | IP20 |
| Mounting Type | DIN Rail |
| Operating Temperature | -25°C to +45°C |
| Compliance | IEC/EN 60898-1 |
Core Features & Market Positioning
The Siemens 5SN6208-7CN MCB stands out due to its reliable performance and adherence to stringent international safety standards, including IEC/EN 60898-1. Its Type C tripping characteristic is a key differentiator, offering enhanced protection for circuits with moderate inrush currents commonly found in inductive loads such as motors and transformers. This characteristic allows for higher start-up currents without nuisance tripping, while still providing rapid fault clearance for short circuits. Siemens' reputation for quality manufacturing ensures durability and long-term operational stability, positioning the 5SN6 series as a trusted choice for critical electrical infrastructure. The breaker's high breaking capacity of 6 kA at 400V AC ensures it can safely interrupt fault currents, preventing severe damage to equipment and mitigating fire hazards.
Key Application Scenarios
This 2-pole, 8A MCB is ideally suited for protecting individual circuits in residential, commercial, and light industrial settings. Common applications include safeguarding lighting circuits, socket outlets, small motor loads, and control circuits where inductive loads may be present. Its 8A rating makes it precise for circuits requiring moderate current handling, preventing overload and short-circuit damage without unnecessary tripping. The 5SN6208-7CN is frequently specified for distribution boards, control panels, and sub-distribution systems where reliable and standardized overcurrent protection is paramount.
Practical System Integration Guidance
Integrating the Siemens 5SN6208-7CN MCB into existing electrical systems is straightforward due to its standard DIN rail mounting capability. Installation requires connecting the line and neutral conductors to the designated terminals, observing correct polarity. Ensure the incoming power supply is de-energized before commencing any wiring to prevent electrical shock. The breaker's robust terminals accommodate standard wire gauges, facilitating secure and reliable connections. Proper torque should be applied to the terminal screws to ensure optimal electrical contact and prevent overheating.
Operation and Risk Mitigation
The primary function of the 5SN6208-7CN MCB is to automatically interrupt an electrical circuit when it detects an overcurrent (overload or short circuit), thereby preventing damage to connected equipment and reducing the risk of electrical fires. The thermal tripping mechanism responds to sustained overloads, while the magnetic tripping mechanism reacts instantaneously to high short-circuit currents. In the event of a trip, the operating lever will move to the OFF position. To reset the breaker, first identify and rectify the cause of the fault, then move the operating lever fully to the ON position. Never force the lever if it does not reset, as this may indicate a persistent fault.
Scalability & Long-Term Value
The Siemens 5SN6 series MCBs are designed for compatibility within Siemens' broader electrical distribution and automation portfolios. This inherent compatibility allows for seamless integration into larger systems and facilitates future expansions or upgrades. While the 5SN6208-7CN is a foundational protection device, it can be part of a scalable solution where additional breakers of varying ratings and characteristics can be added as system demands evolve. Its durable construction and adherence to international standards ensure a long service life, minimizing the need for premature replacements and contributing to the overall long-term value of the electrical installation.
Frequently Asked Questions
What is the tripping characteristic of the Siemens 5SN6208-7CN MCB?
The Siemens 5SN6208-7CN MCB features a Type C tripping characteristic. This means it is designed to trip at currents between 5 to 10 times the rated current. Type C breakers are suitable for circuits with moderate inductive loads that can cause higher inrush currents during startup, such as motors or transformers.
How do I install the Siemens 5SN6208-7CN MCB?
Installation requires mounting the MCB onto a standard 35mm DIN rail. Ensure the power supply to the circuit is de-energized before connecting wires. Connect the line conductor to the upper terminal and the neutral conductor to the lower terminal, observing correct polarity.
What is the breaking capacity of this MCB?
The 5SN6208-7CN MCB has a rated breaking capacity (Icn) of 6 kA at 400V AC. This is the maximum fault current the breaker can safely interrupt without sustaining damage. A 6 kA rating is generally sufficient for most residential and commercial applications.
Can the Siemens 5SN6208-7CN MCB be used for motor protection?
Yes, the Type C tripping characteristic makes it suitable for protecting circuits with small to medium motor loads. The Type C curve accommodates the higher starting current of motors. However, for larger motors or specific protection requirements, a dedicated motor protection circuit breaker might be more appropriate.
What does "2P" signify for this circuit breaker?
"2P" stands for two poles. This indicates that the circuit breaker is designed to simultaneously switch both the live (phase) and neutral conductors of a circuit. Protecting both poles enhances safety by completely isolating the circuit during a fault.
What is the rated current of the Siemens 5SN6208-7CN?
The rated current (In) for the Siemens 5SN6208-7CN is 8 Amperes (A). This is the maximum continuous current the breaker can carry without tripping under normal operating conditions. It is crucial to select an MCB with a rated current appropriate for the protected circuit's load.
Is this MCB compatible with other Siemens electrical components?
Yes, the Siemens 5SN6 series is designed to integrate within Siemens' wider range of electrical distribution and automation products. This ensures compatibility with other Siemens components in panels and control systems.
What safety standards does the 5SN6208-7CN comply with?
The Siemens 5SN6208-7CN MCB complies with international safety standards, including IEC/EN 60898-1. These standards ensure the device meets rigorous performance and safety requirements for circuit protection devices.
What should I do if the circuit breaker trips frequently?
Frequent tripping usually indicates an overload condition or a short circuit in the protected equipment or wiring. First, identify and address the root cause of the fault. Do not repeatedly reset the breaker without resolving the issue, as this can cause damage or pose a safety risk.
What is the operating temperature range for this MCB?
The Siemens 5SN6208-7CN MCB can operate reliably within an ambient temperature range of -25°C to +45°C. Maintaining operation within this specified range is important for ensuring the breaker's performance and longevity.
