Siemens 5SV3617-6 Miniature Circuit Breaker (MCB) 2P 80A 300mA

The Siemens 5SV3617-6 Miniature Circuit Breaker (MCB) is a robust 2-pole, 80A, 300mA residual current device designed for superior electrical protection in demanding industrial and commercial environments. This MCB offers exceptional performance, providing both overcurrent and earth leakage protection, thereby safeguarding personnel and equipment from electrical hazards like short circuits, overloads, and dangerous ground faults. Its high breaking capacity ensures reliable disconnection under fault conditions, minimizing damage and downtime. The 5SV6 series MCBs, to which this model belongs, are renowned for their high dielectric strength and mechanical endurance, making them a trusted choice for critical power distribution applications.

Siemens 5SV3617-6 MCB: Product Specifications

| Feature             | Specification                                |

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

| Product Type        | Miniature Circuit Breaker (MCB) with RCD function |

| Poles               | 2                                            |

| Rated Current (In)  | 80A                                          |

| Residual Current    | 300mA                                        |

| Rated Voltage (Ue)  | 230/400V AC                                  |

| Breading Capacity | 6 60898-1) - -

| Tripping Curve      | C                                            |

| Frequency           | 50/60 Hz                                     |

| Protection Class    | IP20 (terminal), IP40 (enclosure)            |

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

| Mounting            | DIN Rail (35mm)                              |

| Standards           | IEC/EN 60898-1, IEC/EN 61009-1               |

Core Features & Market Positioning

The Siemens 5SV3617-6 MCB distinguishes itself through its advanced residual current detection, offering a sensitive 300mA tripping threshold crucial for preventing electric shock in sensitive areas. Its Type C tripping curve provides a balance between overload protection and nuisance tripping, making it suitable for circuits with moderate inrush currents, such as those powering motors or lighting ballasts. Siemens' established reputation for quality and reliability in circuit protection firmly positions this MCB as a premium solution for professionals who prioritize safety, durability, and compliance with stringent international standards. The device's robust construction ensures a long operational lifespan, minimizing maintenance needs and total cost of ownership.

Key Application Scenarios

This 80A, 2-pole MCB is ideally suited for main incomer protection or distribution circuits in commercial buildings, industrial facilities, and workshops. Its residual current protection makes it invaluable for safeguarding circuits supplying areas with increased risk of electric shock, such as damp environments, or for protecting sensitive electronic equipment from ground faults. Typical applications include main distribution boards, sub-distribution panels for machinery, and circuits powering heavy-duty equipment where an 80A rating is required and comprehensive protection against both overcurrent and earth leakage is paramount.

Practical System Integration Guidance

Integrating the Siemens 5SV3617-6 MCB into existing electrical systems is straightforward due to its standard 35mm DIN rail mounting. Ensure that the incoming power supply terminals (L and N for a 2-pole device) are correctly identified and connected to the load terminals. Proper torque must be applied to the terminal screws to ensure secure connections and prevent overheating. For optimal performance and safety, always ensure that the MCB's rated current (80A) and breaking capacity (6kA) are appropriately matched to the circuit's expected load and fault levels. Always adhere to local electrical codes and regulations during installation.

Operation and Risk Mitigation

The Siemens 5SV3617-6 MCB operates by continuously monitoring the current flowing through its live and neutral conductors. If an imbalance occurs, indicating current leakage to earth (e.g., through a person or faulty equipment), the residual current device (RCD) function trips the breaker. The C-curve tripping characteristic means it will trip on overcurrents between 5 and 10 times the rated current, providing protection against short circuits while tolerating temporary surges. Regular testing of the RCD function using the integrated test button is essential to ensure its continued operational effectiveness and mitigate the risk of electric shock. Always ensure the correct polarity is maintained for safe operation.

Scalability & Long-Term Value

As part of Siemens' comprehensive 5SV6 series, this MCB offers excellent compatibility with other Siemens circuit protection devices and switchgear, facilitating system expansion or upgrades. While this specific 80A model provides substantial capacity, its integration into a modular system allows for future scalability by adding more circuits or upgrading to higher-rated devices where necessary, all within the same DIN rail infrastructure. Its robust design and adherence to international standards ensure its relevance and reliability for years to come, contributing to the long-term value and maintainability of the electrical installation.

Frequently Asked Questions

What is the primary function of the Siemens 5SV3617-6 MCB?

The Siemens 5SV3617-6 MCB primarily serves as a protective device against electrical faults. It combines overcurrent protection, safeguarding against overloads and short circuits, with residual current detection to prevent electric shocks.

This dual functionality ensures comprehensive safety for both electrical installations and personnel. Its 80A rating makes it suitable for higher current applications.

The 300mA residual current sensitivity is designed to trip rapidly, minimizing potential harm from earth faults.

How does the 300mA residual current rating benefit an electrical installation?

A 300mA residual current rating is considered supplementary protection, designed to trip when a significant earth leakage current is detected. This level is higher than personal protection (typically 30mA) but still provides a crucial safety layer.

It significantly reduces the risk of fire caused by persistent earth leakage faults in equipment or wiring. This can prevent serious damage to the installation and assets.

This rating is often mandated for specific types of installations or equipment where a higher level of safety against fire hazards due to earth faults is required.

What type of loads is suitable for the Siemens 5SV3617-6 MCB with a Type C tripping curve?

The Type C tripping curve is characterized by its ability to withstand inrush currents, typically between 5 to 10 times the rated current before tripping. This makes it ideal for inductive loads.

Common applications include circuits powering lighting with fluorescent or discharge lamps, and smaller electric motors, which often have higher starting currents.

It offers a good balance for general-purpose circuits in commercial and industrial settings where occasional, brief current surges are expected without causing nuisance tripping.