Siemens 5SY6206-8CC Industrial Motor Protection Circuit Breaker 2P 6A

The Siemens 5SY6206-8CC is a robust 2-pole, 6A miniature circuit breaker (MCB) designed for reliable motor protection in industrial applications. It offers a tripping characteristic of D, a rated breaking capacity of 6kA, and operates on AC 400V systems. This device ensures effective safeguarding against overcurrents and short circuits, crucial for maintaining the operational integrity of electric motors. Key advantages include its compact design, high breaking capacity, and suitability for demanding industrial environments.

Product Specifications

| Feature                      | Specification                                     |

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

| Product Number               | 5SY6206-8CC                                       |

| Product Type                 | Miniature Circuit Breaker (MCB)                   |

| Poles                        | 2                                                 |

| Rated Current                | 6A                                                |

| Tripping Characteristic      | D                                                 |

| Rated Breaking Capacity (Icn) | 6 kA (acc. to EN 60898) / 5 kA (acc. to UL 1077) |

| Rated Voltage (AC)           | 400V                                              |

| Rated Voltage (DC)           | 72V (maximum)                                     |

| Frequency                    | 50/60 Hz                                          |

| Overvoltage Category         | III                                               |

| Degree of Pollution          | 3                                                 |

| Insulation Voltage           | 440V                                              |

| IP Protection Class          | IP20 (with connected conductors)                  |

| Terminal Connection          | Top and bottom combined terminals                 |

| Conductor Cross-Section      | Solid: 0.75-35 mm²; Stranded: 0.75-35 mm²         |

| Weight                       | 0.320 Kg                                          |

| Operating Temperature        | -25 °C to +55 °C                                  |

| Sealable                     | Yes                                               |

| Halogen-free                 | Yes                                               |

| Silicon-free                 | Yes                                               |

Core Features & Market Positioning

The Siemens 5SY6206-8CC is positioned within the SENTRON series, a well-established line of Siemens protection and switching devices known for their quality and reliability. Its core strength lies in its D-curve tripping characteristic, which is specifically designed for applications with high inrush currents, such as electric motors. This feature differentiates it from standard B or C curve breakers, making it ideal for motor protection where temporary current surges during startup are common. The robust 6kA breaking capacity ensures it can safely interrupt fault currents, providing essential protection for both the motor and the electrical installation. Its compact, modular design also allows for easy integration into existing control panels and systems, fitting neatly onto standard DIN rails.

Key Application Scenarios

The Siemens 5SY6206-8CC circuit breaker is exceptionally well-suited for protecting individual electric motors in various industrial settings. Common applications include:

  Machine Tooling: Safeguarding motors driving spindles, feed mechanisms, and auxiliary equipment in CNC machines and other machine tools.  Conveyor Systems: Protecting the motors that power belt conveyors, roller conveyors, and other material handling systems in manufacturing and logistics.  Pumps and Fans: Ensuring reliable operation and protection for motors used in industrial pumps for fluid transfer and fans for ventilation and cooling applications.  Compressors: Protecting the motors of industrial air compressors from overloads and short circuits.  General Industrial Machinery: Providing essential circuit protection for motors in a wide array of manufacturing equipment.

The D-curve characteristic makes it particularly effective in applications where motors experience significant starting current demands.

Practical System Integration Guidance

Integrating the Siemens 5SY6206-8CC into an electrical system is straightforward due to its standard DIN rail mounting and accessible terminals. Ensure that the conductor cross-sections used are within the specified range of 0.75 mm² to 35 mm² for both solid and stranded wires. For secure connections, the recommended tightening torque for screw-type terminals is 2.5-3 N·m. The breaker is designed for top and bottom terminal connections, offering flexibility in wiring configurations. While the 5SY6206-8CC itself does not have neutral conductor switching, its compatibility with supplementary devices from the Siemens SENTRON range, such as auxiliary switches or remote operation mechanisms (e.g., 5ST3073-0MC, 5ST3062-0MC), allows for enhanced system functionality and monitoring. Always refer to the official Siemens documentation for detailed installation and wiring diagrams.

Operation and Risk Mitigation

The Siemens 5SY6206-8CC operates automatically, tripping the circuit when it detects overcurrents (overload or short circuit) that exceed its rated limits. Its primary function is to prevent damage to the connected motor and associated wiring, as well as to mitigate fire hazards. The D-curve characteristic is optimized for motor starting currents, providing protection without nuisance tripping. In case of a fault, the breaker will trip, interrupting the power supply. To reset, identify and rectify the cause of the fault (e.g., mechanical obstruction, short circuit) and then manually reset the breaker handle. Users should be aware of the IP20 protection rating, which means the device is protected against solid objects larger than 12.5 mm but requires enclosure to protect against moisture and dust. Always ensure the power supply is de-energized before attempting any inspection or reset procedures.

Scalability & Long-Term Value

The Siemens 5SY6206-8CC integrates seamlessly with the broader Siemens SENTRON system, offering excellent scalability. This means it can be part of a larger, coordinated protection scheme. Additional devices such as surge protection devices, residual current devices (RCDs), and overvoltage protection devices from the SENTRON range can be easily added to enhance system safety and functionality. Furthermore, Siemens is at the forefront of industrial digitalization, with solutions that enable IT/OT convergence. While this specific MCB is a foundational component, its integration into smart electrical panels and systems can provide data for monitoring and analysis, supporting predictive maintenance and overall operational efficiency within an Industrial IoT (IIoT) framework. Compatibility with other Siemens control and automation components ensures a unified and future-proof electrical infrastructure.

Frequently Asked Questions (FAQs)

Q1: What is the primary function of the Siemens 5SY6206-8CC?

A1: The 5SY6206-8CC is a miniature circuit breaker designed for motor protection. It safeguards electric motors from damage caused by overcurrents, such as overloads and short circuits. Its specific D-curve tripping characteristic is optimized for motor start-up currents.

A2: This device acts as an automatic safety switch. It interrupts the electrical circuit when it detects excessive current, preventing motor burnout and potential electrical fires. Its reliable performance ensures operational continuity for connected equipment.

A3: By providing protection against fault conditions, the 5SY6206-8CC plays a crucial role in maintaining the longevity and performance of industrial machinery. It is a fundamental component for electrical safety in automation and control systems.

Q2: What does the 'D' in the tripping characteristic 'D6' signify for the 5SY6206-8CC?

A1: The 'D' characteristic indicates that the breaker is designed to withstand higher inrush currents typical of motor starting. It has a wider magnetic trip range compared to B or C curves.

A2: This makes the 5SY6206-8CC particularly suitable for applications with inductive loads, like electric motors. It prevents nuisance tripping during the brief, high-current surge that occurs when a motor begins to run.

A3: For applications where motors or transformers are connected, a D-curve breaker offers superior protection and operational reliability by accommodating these temporary current peaks.

Q3: What is the breaking capacity of the Siemens 5SY6206-8CC?

A1: The 5SY6206-8CC has a rated breaking capacity of 6 kA according to EN 60898 standards. This defines its ability to safely interrupt fault currents.

A2: For applications adhering to UL 1077 and CSA C22.2 No.235 standards, its breaking capacity is rated at 5 kA. This ensures compliance with North American safety regulations.

A3: This breaking capacity is sufficient for most standard industrial low-voltage applications, ensuring protection against severe short-circuit events without damage to the breaker.

Q4: Can the Siemens 5SY6206-8CC be used in DC circuits?

A1: Yes, the 5SY6206-8CC can be used in DC circuits, but with a reduced maximum rated voltage of 72V DC. This specification is important for certain control power applications.

A2: When used in DC circuits, it's crucial to adhere to the specified voltage limits to ensure proper functioning and safety. Standard AC ratings do not directly apply to DC operation.

A3: While it has DC capability, its primary design and optimal performance are for AC industrial motor protection circuits where it excels.

Q5: What types of conductors can be connected to the 5SY6206-8CC?

A1: The 5SY6206-8CC accepts both solid and stranded conductors. This flexibility simplifies installation in diverse electrical environments.

A2: The permissible range for conductor cross-sections is from a minimum of 0.75 mm² to a maximum of 35 mm². This accommodates a wide variety of wiring sizes.

A3: For finely stranded conductors with wire end processing, the maximum cross-section is 25 mm². Always ensure proper termination for reliable connections.

Q6: How does the Siemens 5SY6206-8CC contribute to system safety?

A1: It provides essential protection against electrical hazards like overloads and short circuits. This prevents equipment damage and reduces fire risks.

A2: The device's reliable tripping mechanism ensures that power is cut off swiftly during fault conditions. This safeguards personnel and downstream equipment.

A3: Its robust construction and adherence to international standards (like EN 60898) mean it performs predictably under fault conditions, enhancing overall electrical system safety.

Q7: Is the Siemens 5SY6206-8CC compatible with accessories?

A1: Yes, the 5SY6206-8CC is part of the Siemens SENTRON system and is compatible with various accessories. These can enhance its functionality and integration.

A2: Optional accessories include remote operating mechanisms and auxiliary switches, which allow for remote monitoring and control of the circuit breaker's status.

A3: This modularity enables users to adapt the breaker's capabilities to specific system requirements, such as in complex control panels or automated systems.

Q8: What are the typical installation environments for this circuit breaker?

A1: The 5SY6206-8CC is designed for industrial environments, including manufacturing plants, machine shops, and control cabinets. It is suitable for mechanical engineering applications.

A2: With an IP20 rating when connected, it is protected against finger contact and larger objects. However, it should be installed within an enclosure for protection against dust and moisture.

A3: Its operating temperature range of -25°C to +55°C makes it suitable for a wide spectrum of ambient industrial conditions.

Q9: Can this circuit breaker be sealed for security purposes?

A1: Yes, the Siemens 5SY6206-8CC features a product feature that allows it to be sealed. This is important for applications where unauthorized tampering needs to be prevented.

A2: Sealing the breaker ensures that its settings or operational state cannot be changed without explicit authorization, which is critical in certain safety-critical or controlled environments.

A3: This feature adds an extra layer of security and control, particularly useful in public utility settings or facilities with strict operational protocols.

Q10: What is the significance of the '6KA' rating for the 5SY6206-8CC?

A1: The '6kA' refers to the short-circuit breaking capacity of the circuit breaker. It indicates the maximum fault current the breaker can safely interrupt without being damaged.

A2: A 6kA rating means it can handle a fault current of 6,000 amperes at its rated voltage. This level of protection is standard for many residential and light industrial applications.

A3: This capacity ensures that even in the event of a severe short circuit, the breaker will trip and safely extinguish the arc, protecting the circuit and preventing cascading failures.