Siemens 5SV3412-6 Surge Immunity Time-Delay RCBO 2P 25A 100mA

The Siemens 5SV3412-6 RCBO offers robust surge immunity and reliable overcurrent protection, crucial for safeguarding sensitive electrical installations. This 2-pole, 25A, 100mA device combines the functions of a Miniature Circuit Breaker (MCB) and a Residual Current Device (RCD) with enhanced surge suppression capabilities, making it an ideal choice for demanding industrial and commercial environments. Its advanced tripping characteristics ensure minimal downtime by preventing nuisance tripping due to transient surges, while maintaining essential safety against earth faults.

Product Specifications

| Feature                      | Specification                                |

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

| Product Type                 | RCBO (Residual Current Circuit Breaker with Overcurrent Protection) |

| Poles                        | 2-Pole                                       |

| Rated Current (In)           | 25A                                          |

| Rated Residual Current (IΔn) | 100mA                                        |

| Surge Immunity               | Yes                                          |

| Tripping Type                | Time-Delay                                   |

| Breaking Capacity (Icn)      | 6 kA (IEC 60898-1)                           |

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

| Frequency                    | 50/60 Hz                                     |

| Insulation Voltage (Ui)      | 500V AC                                      |

| Terminal Type                | Screw Terminal                               |

| Mounting Type                | DIN Rail                                     |

| Protection Class             | IP20                                         |

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

| Compliance                   | IEC 61009-1, IEC 61009-2-1                   |

Core Features & Market Positioning

The Siemens 5SV3412-6 stands out in the market due to its integrated surge immunity, a critical differentiator for applications exposed to voltage transients, lightning strikes, or switching surges. This feature significantly reduces the risk of equipment damage and false tripping, which is paramount in industrial settings where operational continuity is key. As a time-delay RCBO, it offers selectivity, allowing downstream protective devices to operate first in case of a fault, thereby minimizing power disruption. Its compact 2-pole design saves valuable panel space, a common concern in electrical engineering. The 100mA residual current sensitivity is optimized for personnel protection against indirect contact.

Key Application Scenarios

This RCBO is particularly well-suited for protecting circuits in environments prone to electrical disturbances, such as manufacturing plants, data centers, and commercial buildings with complex power distribution systems. It is an excellent choice for circuits feeding sensitive electronic equipment, motor control centers, and lighting installations where surge protection is a priority. In areas with higher risks of lightning or grid fluctuations, the Siemens 5SV3412-6 provides an essential layer of defense, ensuring reliable operation and preventing costly downtime. Its application extends to distribution boards and sub-distribution boards requiring comprehensive protection against overcurrents and earth faults.

Practical System Integration Guidance

Integrating the Siemens 5SV3412-6 into existing electrical systems is straightforward, utilizing standard DIN rail mounting for easy installation in distribution panels. Wiring follows standard practices for 2-pole devices, with line and neutral connections clearly marked. Ensure that the incoming supply conductors are connected to the appropriate terminals and the outgoing load conductors are connected to the output terminals. Proper grounding of the system is essential for the effective operation of the residual current protection feature. For installations requiring higher breaking capacities, ensure the upstream protection is adequately sized.

Operation and Risk Mitigation

The 5SV3412-6 operates by continuously monitoring the current balance between the live and neutral conductors. If an imbalance exceeding 100mA occurs, indicative of an earth fault or leakage current, the device trips, disconnecting the circuit. The overcurrent protection, acting as an MCB, trips in response to overload or short-circuit conditions. The time-delay feature helps prevent nuisance tripping from brief, harmless surges. To mitigate risks, regular testing of the residual current function using the built-in test button (typically marked 'T') is recommended. Ensure the device is correctly rated for the circuit's load and fault current levels.

Scalability & Long-Term Value

The Siemens 5SV3412-6 RCBO is designed for compatibility with the broader Siemens industrial control and distribution portfolio, facilitating integration into larger, more complex electrical architectures. Its modular design allows for straightforward replacement or addition of protection devices within standard distribution panels. While this specific model focuses on dedicated circuit protection, its robust construction and reliable performance contribute to the long-term value of any electrical installation by minimizing maintenance requirements and preventing premature equipment failure due to electrical disturbances. Its adherence to international standards ensures future compatibility.

Frequently Asked Questions

What is the primary benefit of the surge immunity in the Siemens 5SV3412-6?

Surge immunity protects connected equipment from damaging voltage spikes. This prevents costly failures and reduces operational downtime in sensitive installations. It is crucial for environments with frequent electrical transients.

What does the 100mA residual current rating signify for safety?

A 100mA rating is primarily for fire protection and protection against indirect contact. It ensures rapid disconnection when significant leakage currents occur. This helps prevent electrical fires and electric shocks.

How does the time-delay feature differentiate this RCBO from standard models?

The time-delay allows for selective tripping in complex systems. It enables downstream devices to operate first during a fault. This minimizes power disruption to unaffected circuits.

Can the Siemens 5SV3412-6 be used in residential applications?

While primarily designed for industrial use, its features can benefit advanced residential systems. It is suitable for circuits with sensitive electronics or higher surge risks. Always ensure compliance with local electrical codes.

What is the breaking capacity (Icn) of this RCBO?

The breaking capacity is 6 kA according to IEC 60898-1. This rating indicates the maximum fault current the device can safely interrupt. It is suitable for many standard industrial and commercial distribution systems.

How often should the test button on the RCBO be used?

The test button should be operated monthly to verify the residual current tripping function. This ensures the device remains operational for earth fault protection. Regular testing is a critical safety measure.

What is the significance of the 2-pole configuration?

A 2-pole configuration provides simultaneous switching of both the live and neutral conductors. This ensures complete isolation of the circuit from the supply. It is standard for many single-phase AC circuits.

Is this RCBO compatible with older Siemens electrical systems?

Generally, Siemens products maintain good backward compatibility within their product lines. However, it's always advisable to check specific installation guidelines for older systems. Ensure voltage and current ratings match.

What are the environmental operating conditions for the 5SV3412-6?

The device operates within a temperature range of -25°C to +45°C. It is rated for indoor use with an IP20 protection class. Avoid installation in excessively humid or dusty environments.

How does the RCBO protect against overloads and short circuits?

It functions as an MCB, incorporating thermal and magnetic tripping mechanisms. Thermal protection handles gradual overloads, while magnetic tripping responds to sudden short circuits. This provides comprehensive overcurrent protection.