Siemens 5SN6232-8CN High Breaking Capacity Miniature Circuit Breaker 2P 32A

The Siemens 5SN6232-8CN Miniature Circuit Breaker (MCB) is a robust, 2-pole, 32A device engineered for superior overcurrent protection in demanding industrial and commercial environments. This high-breaking capacity MCB offers exceptional reliability, ensuring uninterrupted power supply and safeguarding sensitive electrical equipment. Its core advantages lie in its robust construction, precise tripping characteristics, and compliance with stringent international safety standards, making it a preferred choice for engineers and specifiers prioritizing safety and performance. Key technical parameters include a rated breaking capacity of 6 kA, conforming to IEC/EN 60898-1, and a tripping curve of Type B, suitable for protecting circuits with low inrush currents. The device operates efficiently within a temperature range of -25°C to +45°C, further emphasizing its suitability for diverse operational settings.

Product Specifications

| Specification              | Value                               |

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

| Product Type               | Miniature Circuit Breaker (MCB)     |

| Manufacturer               | Siemens                             |

| Model Number               | 5SN6232-8CN                         |

| Number of Poles            | 2                                   |

| Rated Current (In)         | 32 A                                |

| Rated Breaking Capacity (Icn) | 6 kA                                |

| Tripping Curve             | Type B                              |

| Voltage Rating (Ue)        | 400V AC                             |

| Frequency                  | 50/60 Hz                            |

| Insulation Voltage (Ui)    | 500V AC                             |

| Overvoltage Category       | III                                 |

| Protection Class (Housing) | IP20                                |

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

| Mounting Type              | DIN Rail (35mm)                     |

| Conformance Standards      | IEC/EN 60898-1                      |

Core Features & Market Positioning

The Siemens 5SN6232-8CN distinguishes itself through its exceptional breaking capacity, a critical differentiator for applications where fault currents can be significantly high. This capability ensures the MCB can safely interrupt dangerous fault currents without sustaining damage, thereby enhancing system safety and reducing downtime. Its Type B tripping characteristic is specifically designed for circuits with low inductive loads, offering sensitive protection against overloads and short circuits while minimizing nuisance tripping. This precision positions the 5SN6232-8CN as an ideal solution for sensitive electronic equipment and lighting circuits where rapid, reliable protection is paramount. The Siemens brand itself brings a legacy of quality and reliability, further cementing the product's market standing as a dependable component in electrical installations.

Key Application Scenarios

This 2-pole, 32A Siemens MCB finds extensive application in residential, commercial, and light industrial settings. It is particularly well-suited for protecting main distribution boards, sub-distribution boards, and individual circuits within buildings. Common use cases include safeguarding lighting circuits, socket outlets, and small appliances that exhibit low inrush currents, where a Type B breaker offers optimal protection. In commercial environments, it serves effectively in office buildings, retail spaces, and educational institutions for general power distribution. Its robust construction and 6 kA breaking capacity also make it a viable option for light industrial control panels and auxiliary circuits where reliable overcurrent protection is essential.

Practical System Integration Guidance

Integrating the Siemens 5SN6232-8CN into existing electrical systems is straightforward due to its standard 35mm DIN rail mounting. Ensure the main power supply is de-energized before commencing any installation work. Connect the line conductor to terminal L and the neutral conductor to terminal N. Securely tighten the terminal screws to the recommended torque to prevent loose connections, which can lead to overheating and potential hazards. For a 2-pole breaker, both the phase and neutral conductors must be switched simultaneously, providing complete isolation of the circuit. Always verify that the incoming voltage and frequency are within the MCB's specified operating range (400V AC, 50/60 Hz).

Operation and Risk Mitigation

Safe operation of the Siemens 5SN6232-8CN MCB relies on understanding its tripping mechanisms and adhering to proper usage guidelines. The Type B tripping curve provides magnetic tripping between 3 to 5 times the rated current, ideal for preventing damage from short circuits. Thermal tripping, activated by sustained overloads, operates at approximately 1.05 to 1.3 times the rated current over a period. To mitigate risks, regularly inspect the MCB for any signs of physical damage or overheating, such as discoloration or deformation. Avoid operating the breaker with wet hands or in excessively damp environments. In the event of repeated tripping, investigate the cause of the overload or short circuit before resetting the device; do not force the handle if it does not reset.

Scalability & Long-Term Value

The Siemens 5SN6232-8CN offers significant long-term value through its compatibility with Siemens' broader range of electrical distribution components. Its standard DIN rail mounting ensures easy integration into existing or planned switchboards, allowing for straightforward expansion or modification of electrical systems. While this specific model is a foundational protection device, its robust design and adherence to international standards mean it remains a reliable component even as power distribution needs evolve. For enhanced system intelligence, integration into more advanced building management systems or IIoT platforms would typically involve auxiliary contacts or external monitoring devices, leveraging the MCB's core protection function within a larger, connected infrastructure.

Frequently Asked Questions (FAQs)

1. What is the breaking capacity of the Siemens 5SN6232-8CN MCB?

The Siemens 5SN6232-8CN boasts a robust 6 kA breaking capacity.

This rating ensures it can safely interrupt high fault currents in industrial settings.

It meets international standards like IEC/EN 60898-1 for reliable protection.

2. What type of tripping curve does the 5SN6232-8CN use?

This MCB features a Type B tripping curve.

Type B is suitable for circuits with low inrush currents, like lighting.

It offers magnetic tripping between 3 to 5 times the rated current.

3. What is the rated current for the Siemens 5SN6232-8CN?

The Siemens 5SN6232-8CN is rated for 32 Amperes.

This current rating is ideal for circuits requiring moderate power distribution.

Ensure the connected load does not exceed this 32A limit for safe operation.

4. Can this MCB be used for both residential and industrial applications?

Yes, its versatility suits both residential and commercial uses.

It is also effective in light industrial control panels.

The 6kA breaking capacity is a key factor for its industrial suitability.

5. How is the Siemens 5SN6232-8CN installed?

Installation requires mounting on a standard 35mm DIN rail.

Ensure the power supply is completely disconnected before wiring.

Connect line and neutral conductors to the appropriate terminals.

6. What is the operating voltage for this circuit breaker?

The rated operating voltage is 400V AC.

It is designed for standard mains frequencies of 50/60 Hz.

Always confirm your system voltage matches the breaker's rating.

7. What does "2P" signify in the product name?

"2P" indicates that the circuit breaker has two poles.

This means it can switch both the phase and neutral conductors simultaneously.

It provides complete isolation for the protected circuit.

8. What is the IP rating of the 5SN6232-8CN?

The IP rating for the housing is IP20.

This signifies protection against solid objects larger than 12.5mm.

It is not suitable for environments requiring higher ingress protection.

9. Does this MCB offer overload protection?

Yes, it provides both overload and short-circuit protection.

Overload protection is managed by its thermal tripping mechanism.

This ensures safety during prolonged current surges.

10. What troubleshooting steps should be taken if the breaker trips repeatedly?

First, identify and eliminate the cause of the trip.

Check for overloaded circuits or potential short circuits.

Do not force the breaker handle; investigate the fault.