Siemens 5SY6504-7CC Double Pole Miniature Circuit Breaker 1P+N 4A

The Siemens 5SY6504-7CC Double Pole Miniature Circuit Breaker (MCB) is a critical component for robust electrical protection in various industrial and commercial applications. Engineered for reliability, this 1P+N, 4A MCB offers superior circuit interruption capabilities, safeguarding systems against overcurrents and short circuits. Its advanced design ensures high performance and a long operational lifespan, making it a preferred choice for electricians and system integrators prioritizing safety and efficiency.

Siemens 5SY6504-7CC: Product Specifications

| Specification                   | Value                                   |

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

| Product Number                  | 5SY6504-7CC                             |

| Voltage Rating                  | 230 V AC                                |

| Breaking Capacity               | 6 kA (acc. to EN 60898), 30 kA (acc. to IEC 60947-2) |

| Number of Poles                 | 1P+N (1 Pole + Neutral)                 |

| Current Rating                  | 4 A                                     |

| Tripping Characteristic         | C                                       |

| Mounting Depth                  | 70 mm                                   |

| Energy Limiting Class           | 3                                       |

| Overvoltage Category            | III                                     |

| Degree of Pollution             | 3                                       |

| Protection Class                | IP20 (with connected conductors)        |

| Supply Voltage Frequency        | 50/60 Hz                                |

| Mechanical Service Life         | 10,000 operating cycles (typical)       |

| Insulation Voltage (Ui)         | 250 V (single-phase AC)                 |

| Operating Voltage (DC)          | Max. 72 V                               |

| Halogen-free                    | Yes                                     |

| Sealable                        | Yes                                     |

| Installable Supplementary Devices | Yes                                     |

Core Features & Market Positioning

The Siemens 5SY6504-7CC distinguishes itself through its robust construction and adherence to stringent international standards, including EN 60898 and IEC 60947-2. Its "C" tripping characteristic makes it suitable for applications with moderate inrush currents, common in inductive loads, providing reliable protection without nuisance tripping. The 1P+N pole configuration is particularly advantageous for single-phase circuits requiring neutral conductor switching, simplifying installations and ensuring comprehensive protection. This MCB is positioned as a dependable, high-quality solution for protecting circuits in residential, commercial, and light industrial settings where a 4A rating is appropriate.

Key Application Scenarios

This Siemens MCB finds extensive use in protecting lighting circuits, control circuits, and smaller motor loads within electrical distribution boards. Its specific 4A rating is ideal for sensitive electronic equipment or circuits with low current demands, ensuring precise overcurrent protection. The 1P+N design simplifies wiring in systems where the neutral conductor also needs to be switched and protected, a common requirement in many single-phase installations. It is a staple component in panel building for residential construction, commercial buildings, and small to medium-sized industrial facilities.

Practical System Integration Guidance

Installation of the Siemens 5SY6504-7CC requires adherence to standard electrical safety protocols. The device is designed for DIN rail mounting, fitting into standard distribution enclosures. Connections are made via terminal screws, accommodating solid, stranded, and finely stranded conductors with appropriate core end processing. For example, stranded conductors with core end processing can range from a minimum of 0.75 mm² to a maximum of 25 mm², with a tightening torque of 2.5 to 3 N·m. The MCB supports the installation of supplementary devices, such as auxiliary switches or remote signaling units, enhancing its functionality and integration into larger control systems.

Operation and Risk Mitigation

The primary function of the Siemens 5SY6504-7CC is to interrupt the electrical circuit when a fault condition, such as an overload or short circuit, is detected. The "C" characteristic means it trips between 5 to 10 times the rated current. In case of overload, the thermal trip mechanism activates, while short circuits trigger the magnetic trip mechanism. Proper installation, including correct conductor sizing and connection torques, is crucial to prevent overheating and ensure reliable operation. Users should consult the product's manual for detailed troubleshooting information, though common issues typically relate to incorrect wiring or external fault conditions rather than device malfunction.

Scalability & Long-Term Value

As part of Siemens' extensive SENTRON product line, the 5SY6504-7CC offers compatibility with a wide range of Siemens circuit protection and switchgear components. This interoperability ensures flexibility in system design and allows for future upgrades or expansions. While not directly an IIoT device, its integration into Siemens' broader electrical infrastructure enables connection to intelligent power monitoring and management systems, contributing to the overall digitalization of electrical installations. The active product lifecycle status and availability of support documentation, including datasheets and manuals, underscore its long-term value and continued support within the Siemens ecosystem.

Frequently Asked Questions (FAQs)

What is the breaking capacity of the Siemens 5SY6504-7CC?

The Siemens 5SY6504-7CC boasts a breaking capacity of 6 kA according to EN 60898, suitable for residential and commercial installations. It also offers a higher breaking capacity of 30 kA in accordance with IEC 60947-2, indicating its suitability for more demanding industrial applications. This dual rating ensures robust protection against fault currents.

What does the "C" tripping characteristic signify for this MCB?

A "C" characteristic means the circuit breaker trips when the current reaches 5 to 10 times its rated current. This is ideal for circuits with moderate inrush currents, such as those powering fluorescent lighting or small motors. It balances sensitive protection with tolerance for transient surges.

Can the Siemens 5SY6504-7CC be used in DC circuits?

Yes, the 5SY6504-7CC can be used in DC circuits, with a maximum operating voltage of 72 V DC. It also has a DC switching capacity of 15 kA according to IEC 60947-2. However, it's important to ensure the application aligns with its DC specifications.

What are the dimensions and mounting requirements for this circuit breaker?

This MCB has a mounting depth of 70 mm and is designed for standard DIN rail mounting. Its width accommodates 2 module spaces (1P+N). Proper clearance for ventilation and connection is essential during installation.

What type of loads is the Siemens 5SY6504-7CC best suited for?

The 4A rating and C-curve make it ideal for protecting lighting circuits, control circuits, and smaller inductive loads. It is also suitable for sensitive electronic equipment where precise current protection is needed. Avoid using it for large motor starting or high inrush current devices.

Is this circuit breaker compatible with other Siemens SENTRON devices?

Yes, the 5SY6504-7CC is part of the Siemens SENTRON product family, ensuring compatibility with other SENTRON components. This allows for seamless integration into larger electrical systems and distribution boards.

What is the mechanical service life of the 5SY6504-7CC?

The typical mechanical service life for this circuit breaker is 10,000 operating cycles. This metric refers to the number of times the breaker can be switched on and off manually, independent of electrical load. It signifies a durable and long-lasting component.

Does this MCB feature neutral conductor switching?

Yes, the 5SY6504-7CC is a 1P+N (1 Pole + Neutral) circuit breaker, meaning it includes switching for both the live conductor and the neutral conductor. This is crucial for complete isolation and safety in single-phase circuits.

What is the IP protection rating of this device?

The Siemens 5SY6504-7CC has an IP20 protection rating when connected conductors are properly installed. This means it is protected against solid objects greater than 12.5 mm (like fingers) but offers no protection against water ingress.

Can supplementary devices be added to the 5SY6504-7CC?

Yes, the 5SY6504-7CC is designed to accept installable supplementary devices. These can include auxiliary switches for remote signaling, shunt releases for remote tripping, or overvoltage protection modules. This enhances its functionality and integration capabilities.