Siemens 5SY6463-7CC Single Phase Maximum Power Circuit Breaker 4P 63A

The Siemens 5SY6463-7CC is a robust 4-pole, 63A single-phase maximum power circuit breaker engineered for demanding industrial and commercial electrical distribution systems. This device offers superior protection against overcurrents and short circuits, ensuring operational continuity and safeguarding sensitive equipment. Its core advantages lie in its high breaking capacity, reliable tripping mechanisms, and compact design, making it a preferred choice for applications requiring robust safety and efficient space utilization. Key technical parameters include a rated voltage of 400V AC, a breaking capacity of 10kA, and an energy limitation class of 3, all contributing to its exceptional performance and safety profile.

Product Specifications

| Specification           | Value                                 |

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

| Product Type            | Miniature Circuit Breaker (MCB)       |

| Manufacturer            | Siemens                               |

| Series                  | 5SY6                              |

| Poles                   | 4                                     |

| Rated Current (In)      | 63 A                                  |

| Rated Voltage (Un)      | 400 V AC                              |

| Frequency               | 50/60 Hz                              |

| Breaking Capacity (Icn) | 10 kA                                 |

| Tripping Characteristic | C                                     |

| Energy Limitation Class | 3                                     |

| Protection Class        | IP20 (enclosure), IP40 (if installed) |

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

| Mounting Type           | DIN rail                             |

| Terminal Type           | Screw terminals                       |

| Compliance Standards    | IEC/EN 60898-1, IEC/EN 60947-2        |

Core Features & Market Positioning

The Siemens 5SY6463-7CC distinguishes itself in the market through its exceptional combination of fault current handling and operational reliability. Its 10kA breaking capacity is a significant advantage, capable of safely interrupting high fault currents that could overwhelm lesser devices. This robust performance positions it as a superior choice for main distribution boards and critical circuits where safety and system integrity are paramount. The tripping characteristic "C" indicates its suitability for inductive loads with moderate inrush currents, such as motors and transformers, offering a balance between sensitivity to faults and immunity to nuisance tripping during startup. Siemens' reputation for quality and innovation further underpins the market confidence in the 5SY6 series, known for its long service life and consistent performance.

Key Application Scenarios

This 4-pole, 63A circuit breaker is ideally suited for a wide array of industrial and commercial applications. It serves as essential protection in main distribution panels for buildings, industrial facilities, and power distribution networks, effectively isolating faults to prevent widespread outages. Its capability to handle 400V AC makes it a standard component in three-phase systems where reliable overcurrent and short-circuit protection is mandated. Specific use cases include protecting circuits feeding machinery, HVAC systems, lighting installations, and other critical loads where consistent power delivery and equipment protection are non-negotiable.

Practical System Integration Guidance

Integrating the Siemens 5SY6463-7CC into existing electrical infrastructure is a straightforward process, adhering to standard electrical codes and practices. Installation involves snapping the breaker onto a standard 35mm DIN rail within a suitable enclosure. Proper wiring is crucial; the four poles must be correctly connected to the incoming phase and neutral conductors and outgoing load conductors to ensure complete circuit isolation upon tripping. Wire termination is achieved using screw terminals, which require appropriate torque to ensure a secure and reliable connection, preventing overheating and potential hazards. Always ensure the main power supply is de-energized before commencing any installation or wiring work.

Operation and Risk Mitigation

The primary function of the Siemens 5SY6463-7CC is to protect electrical circuits from damage caused by overloads and short circuits. Overloads occur when a circuit draws more current than it is designed for over an extended period, leading to overheating. Short circuits are sudden, high-current events caused by a low-resistance path between conductors. The breaker's thermal-magnetic trip unit detects these conditions; the thermal element responds to sustained overloads, while the magnetic element reacts instantaneously to severe short circuits, tripping the mechanism and opening the circuit. To mitigate risks, ensure the breaker is correctly rated for the circuit's load and that the system is properly grounded. Regular visual inspections for any signs of damage or overheating, along with periodic testing of its tripping function, are recommended best practices.

Scalability & Long-Term Value

The Siemens 5SY6463-7CC, as part of Siemens' extensive electrical components portfolio, offers excellent long-term value and integration potential. While this specific model is a fixed-rating device, its compatibility with the broader Siemens 5SY series and other Siemens distribution systems ensures that expansion or upgrades to different protection levels can be achieved seamlessly. Its robust construction and adherence to international standards like IEC/EN 60898-1 and IEC/EN 60947-2 guarantee a long operational lifespan, reducing the need for frequent replacements. For facilities looking towards digitalization, Siemens offers associated products and gateway solutions that can monitor the status of circuit breakers, providing valuable data for predictive maintenance and energy management within an Industrial Internet of Things (IIoT) framework.

Frequently Asked Questions (FAQs)

Q1: What is the breaking capacity of the Siemens 5SY6463-7CC?

The Siemens 5SY6463-7CC features a robust breaking capacity of 10 kA. This means it can safely interrupt and clear fault currents up to 10,000 amperes.

This high fault current rating is critical for protecting electrical installations against severe short circuits. It ensures that the breaker can safely de-energize the circuit without sustaining damage itself, maintaining system integrity.

Choosing a breaker with adequate breaking capacity, like this 10kA model, is essential for compliance with safety standards and for reliable protection of downstream equipment.

Q2: Can the Siemens 5SY6463-7CC be used for single-phase applications?

Yes, the Siemens 5SY6463-7CC is designed for single-phase applications, but it is a 4-pole breaker. In single-phase systems, typically two poles are used for the live conductors and two poles are used for the neutral conductors, providing comprehensive isolation.

This 4-pole configuration ensures complete disconnection of both live and neutral lines when a fault occurs. It offers a higher level of safety and isolation compared to 2-pole devices in certain applications.

While often associated with three-phase power, 4-pole breakers are also utilized in specific single-phase setups requiring full isolation of both live and neutral.

Q3: What is the tripping characteristic of this Siemens circuit breaker?

The Siemens 5SY6463-7CC has a "C" type tripping characteristic. This means it is designed to trip between 5 to 10 times the rated current.

"C" characteristic breakers are ideal for circuits with moderate inrush currents, such as fluorescent lighting, socket outlets, and small to medium motors. They strike a balance between protecting against faults and avoiding nuisance tripping.

This characteristic makes the 5SY6463-7CC suitable for a wide range of commercial and industrial applications where equipment might have higher startup current demands.

Q4: What is the rated current and voltage for the Siemens 5SY6463-7CC?

This specific model, the 5SY6463-7CC, has a rated current of 63 Amperes (A). Its rated voltage is 400 Volts Alternating Current (AC).

The 63A rating indicates the maximum continuous current the breaker can safely handle without tripping. The 400V AC rating makes it suitable for standard European and many international power distribution systems.

Ensure that the circuit you are protecting does not consistently draw current close to or exceeding 63A to prevent premature tripping or overload.

Q5: What type of loads is the Siemens 5SY6463-7CC best suited for?

The Siemens 5SY6463-7CC, with its "C" tripping characteristic, is well-suited for loads that exhibit moderate inrush currents. This includes inductive loads like motors, transformers, and solenoid coils.

It provides reliable protection for general power distribution circuits in commercial buildings and industrial settings, such as lighting, heating elements, and standard power outlets. Its 4-pole design also offers enhanced safety for systems requiring full isolation.

Its ability to handle inrush currents prevents nuisance tripping during the startup phase of equipment, ensuring operational continuity while still offering robust fault protection.

Q6: How do I install the Siemens 5SY6463-7CC circuit breaker?

Installation involves mounting the breaker onto a standard 35mm DIN rail within a suitable electrical enclosure. Ensure the power supply is completely disconnected before proceeding.

Connect the incoming live and neutral conductors to the appropriate terminals on the breaker, typically marked with L and N or corresponding pole indicators. The outgoing load conductors are then connected to the output terminals.

Use appropriately sized conductors and ensure all screw terminals are tightened to the specified torque to guarantee a secure and safe electrical connection. Always follow local electrical codes and regulations.

Q7: What does "Energy Limitation Class 3" mean for this breaker?

Energy Limitation Class 3 signifies that the Siemens 5SY6463-7CC effectively limits the amount of energy that can pass through it during a fault condition. A lower energy value means less thermal stress on the circuit and downstream components.

Class 3 breakers are highly effective at quickly interrupting fault currents, thereby minimizing damage to cables and equipment. This feature is crucial for enhancing safety and prolonging the life of electrical installations.

This classification is an important technical parameter indicating the breaker's capability to prevent catastrophic damage during severe short circuits, making it a reliable protective device.

Q8: What are the main advantages of using a 4-pole breaker like the 5SY6463-7CC?

A key advantage of a 4-pole breaker is the complete isolation it provides for both live conductors and the neutral conductor. This ensures a higher level of safety during maintenance or fault conditions.

In systems where the neutral conductor is switched or carries current, a 4-pole breaker is essential. It offers full disconnection, unlike 2-pole breakers that only switch the live conductor.

This comprehensive isolation is particularly beneficial in certain industrial applications and for specific safety requirements where a complete break from the power source is mandated.

Q9: Is this Siemens breaker suitable for DC applications?

No, the Siemens 5SY6463-7CC is specifically designed and rated for Alternating Current (AC) applications only. Its tripping mechanisms and insulation are optimized for AC power systems.

Using this breaker on a Direct Current (DC) circuit could lead to unpredictable performance and potential failure to trip correctly, posing a significant safety hazard.

Always verify the product's specifications to ensure it is rated for the type of current (AC or DC) and voltage of the system you intend to protect.

Q10: Where can I find documentation or datasheets for the Siemens 5SY6463-7CC?

Official documentation and detailed technical datasheets for the Siemens 5SY6463-7CC can typically be found on the Siemens Industry Online Support (SIOS) portal. You may also find them on authorized Siemens distributor websites.

Searching for "Siemens 5SY6463-7CC datasheet" or "Siemens 5SY6 catalog" on a search engine will usually lead you to the relevant PDF documents. These documents contain comprehensive information on specifications, dimensions, and installation guidelines.

Always refer to the official manufacturer's documentation for the most accurate and up-to-date information regarding product specifications, safety precautions, and application guidance.