Siemens 5SY6380-7CC Ultimate Protection Miniature Circuit Breaker 3P 80A

The Siemens 5SY6380-7CC is a robust, three-pole miniature circuit breaker designed for ultimate protection in demanding industrial environments. This 80A device offers superior overcurrent and short-circuit protection, crucial for safeguarding sensitive electrical equipment and ensuring operational continuity. Its high breaking capacity and reliable tripping characteristics make it an indispensable component in power distribution systems. Key technical parameters include its 3-pole configuration, a rated current of 80A, and a breaking capacity of 25kA, all contributing to its suitability for heavy-duty applications.

Product Specifications

| Feature                  | Specification             |

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

| Product Type             | Miniature Circuit Breaker |

| Manufacturer             | Siemens                   |

| Model Number             | 5SY6380-7CC               |

| Number of Poles          | 3                         |

| Rated Current (In)       | 80A                       |

| Breaking Capacity (Icn)  | 25kA                      |

| Rated Voltage (Ue)       | 400V AC                   |

| Tripping Curve           | C                         |

| Frequency                | 50/60 Hz                  |

| Protection Class         | IP20                      |

| Mounting Type            | DIN Rail                  |

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

Core Features & Market Positioning

The Siemens 5SY6380-7CC distinguishes itself through its exceptional reliability and adherence to stringent international safety standards, including IEC/EN 60898-1. Its robust construction ensures longevity and consistent performance even under extreme conditions, a critical factor for industrial uptime. The 'C' type tripping curve provides enhanced protection against inductive loads and motor starts, offering a more nuanced safeguarding approach compared to standard 'B' or 'D' curves. This positions the 5SY6380-7CC as a premium solution for applications demanding precise and dependable circuit protection, where downtime is not an option.

Key Application Scenarios

This 3-pole 80A circuit breaker is engineered for critical roles in industrial power distribution, particularly in motor control circuits, distribution boards, and main power inlets for machinery. It is ideal for protecting equipment such as large pumps, compressors, and industrial fans where inrush currents are significant. Electrical contractors and plant engineers frequently specify the Siemens 5SY6380-7CC for new installations and upgrades in manufacturing facilities, chemical plants, and commercial buildings where consistent power quality and protection are paramount. Its 80A rating makes it suitable for circuits with substantial power requirements.

Practical System Integration Guidance

Integrating the Siemens 5SY6380-7CC is straightforward due to its standard DIN rail mounting capability, ensuring compatibility with most industrial electrical enclosures. Proper wiring is essential; ensure the incoming power supply is connected to the upper terminals and the outgoing load to the lower terminals. For optimal performance and safety, ensure all connections are tight and insulated. The breaker's terminal capacity supports appropriate conductor sizes for an 80A load. It's recommended to consult the product datasheet for precise torque specifications and conductor compatibility to prevent overheating and ensure secure connections.

Operation and Risk Mitigation

The Siemens 5SY6380-7CC operates automatically to interrupt the circuit during overcurrent or short-circuit events, thereby preventing damage to connected equipment and mitigating fire hazards. Its tripping mechanism is designed for rapid response, minimizing the duration of fault currents. To mitigate risks, regular visual inspections for dust accumulation or physical damage are advised. If the breaker trips frequently, it indicates an underlying circuit issue—such as overloading or a developing fault—that requires immediate investigation rather than simply resetting the breaker. Understanding the 'C' curve behavior is crucial for correct application.

Scalability & Long-Term Value

The Siemens 5SY6380-7CC is part of Siemens' comprehensive portfolio of electrical protection devices, ensuring compatibility with other Siemens components within distribution panels. While miniature circuit breakers are typically direct-replacement devices, their long-term value is derived from their durability and the extensive support network Siemens provides. For industrial facilities embracing Industry 4.0, while this specific model may not have native IIoT connectivity, it serves as a reliable foundational protection device within a broader, potentially smart, electrical infrastructure. Its robust design ensures a long service life, reducing replacement frequency.

Frequently Asked Questions

What is the primary function of the Siemens 5SY6380-7CC?

This breaker provides overcurrent and short-circuit protection for electrical circuits. It is designed to safely interrupt power flow when fault conditions are detected, preventing damage to connected equipment and mitigating fire risks. Its 3-pole configuration makes it suitable for three-phase applications.

It acts as an automatic safety switch, designed to protect machinery and personnel from electrical hazards. The 80A rating signifies the maximum continuous current it can safely handle without tripping under normal operating conditions. Proper application ensures reliable circuit integrity.

The device's primary role is to safeguard circuits from sudden surges or prolonged excessive current. This protection is vital for industrial machinery, power distribution panels, and critical infrastructure where electrical faults can lead to costly downtime or safety incidents.

What does the 'C' in 5SY6380-7CC signify regarding its tripping characteristics?

The 'C' designation refers to the tripping curve, indicating how quickly the breaker responds to overcurrents. A Type C breaker is designed to tolerate higher inrush currents, typical of inductive loads like motors. This makes it suitable for applications where motor starts or transformer energization may cause temporary current spikes.

This characteristic allows for motor starting without nuisance tripping, a common issue with Type B breakers in such scenarios. It offers a balance between sensitivity to faults and tolerance for temporary overloads. The specific range for Type C tripping is typically 5 to 10 times the rated current.

The 'C' curve is a crucial differentiator, enabling the 5SY6380-7CC to reliably protect equipment with significant starting currents. It ensures operational stability by preventing unwarranted shutdowns while still providing rapid protection against damaging short circuits and severe overloads.

Can the Siemens 5SY6380-7CC be used in residential applications?

While designed for industrial use, the 5SY6380-7CC's compliance with relevant IEC/EN standards means it could technically be used in some high-power residential circuits. However, its 80A rating and 3-pole configuration are generally overkill for typical home electrical systems. Standard residential breakers are usually single or double pole with lower current ratings.

It is typically specified for three-phase industrial power distribution, motor circuits, or main incomers where higher fault currents and power demands are present. Using it in a residential setting without proper electrical design considerations could lead to incorrect application and potential safety issues due to its specific characteristics.

For residential applications, it is always recommended to use circuit breakers specifically designed and rated for household electrical installations. These are readily available and provide appropriate protection levels for standard domestic loads and wiring systems.

What is the breaking capacity (Icn) of this circuit breaker?

The Siemens 5SY6380-7CC has a breaking capacity of 25kA. This is a critical safety parameter indicating the maximum fault current the breaker can safely interrupt without sustaining damage. A higher breaking capacity ensures greater protection in high-fault current scenarios common in industrial power systems.

This 25kA rating means the breaker can reliably clear a short-circuit fault current of up to 25,000 amperes at its rated voltage without failure. It is a key specification for ensuring system safety and preventing catastrophic failures during severe electrical events.

Ensuring the installed breaking capacity of the circuit breaker exceeds the prospective short-circuit current at the point of installation is a fundamental electrical safety requirement. The 25kA rating of the 5SY6380-7CC makes it suitable for many industrial distribution points.

How do I install the Siemens 5SY6380-7CC?

Installation involves snapping the breaker onto a standard 35mm DIN rail within an appropriate electrical enclosure. Connect the incoming power conductors to the upper terminals and the outgoing load conductors to the lower terminals. Ensure all connections are secure and torqued to the manufacturer's specifications to prevent loose connections and overheating.

Always ensure the main power supply to the enclosure is de-energized and locked out before commencing any installation work. Use appropriately sized conductors for the 80A rating and ensure proper insulation and strain relief. Grounding connections must also be correctly made as per local electrical codes.

Consult the official Siemens installation manual for detailed instructions, including specific torque values and wiring diagrams, to ensure a safe and compliant installation. Incorrect installation can lead to malfunction, equipment damage, or safety hazards.

What troubleshooting steps should I take if the 5SY6380-7CC trips?

If the breaker trips, first identify the cause by checking for overloaded circuits or faulty equipment. Do not repeatedly reset the breaker without investigating the underlying issue. Inspect the connected load and wiring for visible signs of damage or shorts.

If the tripping is due to an overload, reduce the connected load. If it's a short circuit, you must isolate the fault before resetting. Frequent tripping, even with normal loads, may indicate a faulty breaker or a persistent issue within the circuit.

Professional assessment by a qualified electrician is recommended if the cause of tripping is not immediately apparent or if the problem persists after initial troubleshooting. They can perform detailed diagnostic tests to ensure circuit integrity and breaker functionality.

What are the dimensions of the Siemens 5SY6380-7CC?

The Siemens 5SY6380-7CC has a standard modular width for circuit breakers, occupying three pole spaces on a DIN rail. While exact dimensions can vary slightly by manufacturer series, it generally fits within standard panel enclosures designed for such devices. Precise measurements are available in the product datasheet.

Typically, each pole space is about 17.5mm wide, meaning a 3-pole breaker like this one occupies approximately 52.5mm of rail width. The depth and height are standardized for DIN rail mounting systems to ensure interchangeability and ease of integration within electrical panels.

Refer to the product's technical specifications or datasheet for the exact dimensions in millimeters (width x height x depth) to confirm suitability for specific panel layouts or enclosure constraints. This ensures accurate planning and installation.

Is this circuit breaker suitable for DC applications?

The Siemens 5SY6380-7CC is designed and rated for AC (Alternating Current) applications, specifically up to 400V AC. Miniature circuit breakers rated for AC typically perform differently when used with DC (Direct Current) due to the nature of current interruption. Arc extinction is more challenging in DC circuits.

Using an AC-rated breaker in a DC application can be unsafe and may lead to breaker failure, fire, or inadequate protection. For DC applications, specific DC-rated circuit breakers with appropriate voltage and current ratings must be used. These breakers have design features tailored for DC interruption.

Always verify the product's specifications for its intended use. The 5SY6380-7CC is explicitly stated for AC systems, and its use on DC circuits would be a misapplication and void any safety certifications or warranties.

What is the expected lifespan of the 5SY6380-7CC?

The expected lifespan of a Siemens 5SY6380-7CC miniature circuit breaker is generally long, often measured in decades under normal operating conditions. Lifespan is influenced by factors such as the number of switching operations, the severity of fault currents interrupted, and environmental conditions like temperature and humidity.

Siemens products are known for their durability and reliability, designed for robust industrial environments. However, like all electrical components, they have a finite operational life. Regular inspection and adherence to installation guidelines contribute to maximizing their service life.

While specific operational cycles are usually detailed in technical documentation, the inherent quality of Siemens components suggests excellent longevity. Replacement is typically considered due to obsolescence, upgrades, or following a significant fault event, rather than premature wear.

Where can I find the datasheet for the Siemens 5SY6380-7CC?

The official datasheet for the Siemens 5SY6380-7CC can be found on the Siemens Industry online portal or through authorized Siemens distributors' websites. Searching for the exact product number (5SY6380-7CC) on the Siemens global website is the most direct method.

Datasheets provide comprehensive technical details, including electrical characteristics, dimensions, installation instructions, and certifications. They are essential resources for engineers and electricians planning installations or troubleshooting issues related to the product.

You can often download the datasheet as a PDF document. If you have trouble locating it, contacting Siemens technical support or your local sales representative will provide direct access to the required documentation.