Siemens 5SY6506-8CC Double Pole Motor Protection Circuit Breaker 1P+N 6A

The Siemens 5SY6506-8CC is a highly reliable 1P+N double-pole miniature circuit breaker designed for robust motor protection. Its key advantages include superior tripping characteristics, enhanced safety features, and compact design, making it an ideal solution for demanding industrial environments. With a nominal current of 6A and a tripping characteristic of C, this breaker ensures precise protection against overloads and short circuits, safeguarding valuable motor assets and preventing costly downtime. The 5SY6 series offers excellent performance and is engineered for seamless integration into various electrical systems.

Product Specifications

| Feature                       | Specification                                  |

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

| Manufacturer                  | Siemens                                        |

| Product Series                | 5SY6                                           |

| Product Type                  | Miniature Circuit Breaker                      |

| Number of Poles               | 2 (1P+N)                                       |

| Rated Current (In)            | 6 A                                            |

| Tripping Characteristic       | C                                              |

| Breaking Capacity (Icn)       | 10 kA (IEC/EN 60947-2)                         |

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

| Frequency                     | 50/60 Hz                                       |

| Terminal Type                 | Screw terminals                                |

| Mounting Type                 | DIN rail (35 mm)                               |

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

| Protection Class              | IP20 (enclosure), IP4X (terminals)             |

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

| Color                         | White                                          |

Core Features & Market Positioning

The Siemens 5SY6506-8CC distinguishes itself through its advanced tripping mechanism, offering a C-curve characteristic optimized for motor starting currents. This precise tripping ensures that the breaker effectively distinguishes between nuisance tripping due to temporary inrush currents and genuine fault conditions, thereby enhancing operational reliability. Its robust construction, adhering to stringent IEC/EN standards, positions it as a dependable choice for industrial applications where equipment longevity and safety are paramount. The double-pole (1P+N) configuration provides comprehensive protection for single-phase circuits with a neutral conductor, a common requirement in motor control systems.

Key Application Scenarios

This Siemens motor protection circuit breaker is extensively utilized in applications requiring reliable protection for single-phase motors, pumps, fans, and compressors. It is particularly well-suited for control panels in manufacturing plants, HVAC systems, and water treatment facilities where consistent power and fault mitigation are critical. The 6A rating and C-curve make it ideal for motors with moderate starting current requirements, ensuring operational continuity while protecting against damaging overloads and short circuits. Its DIN rail mounting facilitates straightforward installation within standard electrical enclosures, a common need in both new installations and retrofitting projects.

Practical System Integration Guidance

Integrating the Siemens 5SY6506-8CC into existing or new electrical systems is a streamlined process. Ensure the circuit breaker is mounted securely on a standard 35mm DIN rail. The line (input) connections should be made to the upper terminals, typically marked 'L' for live and 'N' for neutral, and the load (output) connections to the lower terminals. Use appropriate gauge wiring that matches the 6A rating and the required voltage for the application, ensuring all connections are tightened firmly with screw terminals to prevent loose connections, which can lead to overheating and potential faults. Always follow local electrical codes and regulations during installation.

Operation and Risk Mitigation

Proper operation of the Siemens 5SY6506-8CC involves understanding its tripping mechanisms. The C-curve characteristic is designed to allow for temporary overcurrents associated with motor start-up without tripping, but will rapidly trip for short circuits. In the event of a trip, identify the cause—usually an overload or a short circuit. For overloads, reduce the connected load. For short circuits, immediately disconnect the faulty equipment. The breaker can be reset by simply pushing the operating lever back to the "ON" position after the fault has been cleared. Regular visual inspection for any signs of damage or overheating is recommended to mitigate risks.

Scalability & Long-Term Value

The Siemens 5SY6 series offers a degree of scalability through its compatibility with a wide range of Siemens industrial control and automation components. While this specific 6A model is designed for its rated capacity, adjacent ratings within the 5SY6 series can be selected for higher or lower current requirements, ensuring a consistent protection strategy across different motor sizes. Its robust design contributes to long-term value by minimizing the need for frequent replacements due to its durability and resistance to environmental factors within specified operating conditions. Integration into smart grids or IIoT platforms can be facilitated through compatible downstream devices and intelligent monitoring systems.

Frequently Asked Questions

What is the primary function of the Siemens 5SY6506-8CC?

This circuit breaker is designed to protect electrical circuits, particularly motors, from overcurrents. It automatically trips to interrupt the power supply when an overload or short circuit condition is detected.

It ensures the safety of connected equipment and prevents damage caused by excessive electrical current. The double-pole design offers protection for both the live and neutral conductors.

The 6A rating and C-curve characteristic are specifically suited for applications with moderate inrush currents, such as those found in motor starting.

How do I correctly wire the Siemens 5SY6506-8CC for a single-phase motor?

Connect the incoming live wire to the 'L' terminal on the top of the breaker. Connect the incoming neutral wire to the 'N' terminal on the top.

Then, connect the outgoing live wire going to the motor to the 'L' terminal on the bottom. Connect the outgoing neutral wire to the 'N' terminal on the bottom of the breaker.

Ensure all screw terminals are securely tightened to the manufacturer's recommended torque specifications to prevent loose connections and potential hazards.

What does the 'C' in the 5SY6506-8CC tripping characteristic signify?

A 'C' curve designation indicates that the breaker is designed for circuits with moderate inductive loads, such as motors. It allows for a higher inrush current during startup compared to a 'B' curve breaker.

Specifically, a C-curve breaker will trip between 5 to 10 times its rated current. This characteristic prevents nuisance tripping during motor start-up while still providing adequate protection against short circuits.

This makes it ideal for applications where motors are frequently started and stopped, offering a balance between sensitivity to faults and tolerance for transient current demands.