Siemens 5SY6140-7CC Industrial Air Circuit Breaker Protector 1P 40A
Siemens 5SY6140-7CC Industrial Air Circuit Breaker Protector: Precision Protection for Demanding Environments
The Siemens 5SY6140-7CC Industrial Air Circuit Breaker Protector stands as a robust and reliable solution for safeguarding electrical circuits in industrial settings. Engineered for demanding applications, this single-pole, 40A breaker offers superior overcurrent protection, ensuring the integrity of machinery and personnel. Its key advantages lie in its precise tripping characteristics, high breaking capacity, and compact design, making it an ideal choice for modern electrical installations where space and performance are paramount. With a rated voltage of 230/400V and a breaking capacity of 6kA according to EN 60898 (or 10kA according to IEC 60947-2), the 5SY6140-7CC provides dependable protection against short circuits and overloads.
Product Specifications
| Feature | Specification |
| :---------------------------------- | :--------------------------------------------------------------------------------- |
| Model Number | 5SY6140-7CC |
| Number of Poles | 1P (Single Pole) |
| Rated Current | 40A |
| Rated Voltage (AC) | 230/400V |
| Breaking Capacity (EN 60898) | 6kA at 230V, 6kA at 400V |
| Breaking Capacity (IEC 60947-2) | 10kA at 230V, 10kA at 400V |
| Tripping Characteristic | C |
| Frequency | 50/60 Hz |
| Insulation Voltage (Ui) | 440V |
| Overvoltage Category | 3 |
| Degree of Pollution | 3 |
| Protection Class (IP) | IP20 (with connected conductors) |
| Connectable Conductor Cross-Section | 0.75 - 35mm² (solid-wired), 0.75 - 35mm² (multi-wired) |
| Mechanical Service Life | Typically 10,000 operating cycles |
| Dimensions (Unpackaged) | Height: 90 mm, Width: 18 mm, Depth: 70 mm |
| Weight | Approximately 0.1 kg |
| Operating Temperature Range | -25°C to 55°C |
Core Features & Market Positioning
The Siemens 5SY6140-7CC is a standout miniature circuit breaker (MCB) within Siemens' renowned SENTRON product line, known for its high quality and reliability in power distribution and electrical installation technology. Its market positioning is that of a dependable, cost-effective solution for essential circuit protection in industrial and commercial applications where robust performance and adherence to international standards like IEC 60947-2 and EN 60898 are critical. The "C" curve tripping characteristic indicates it's designed to handle moderate inrush currents associated with inductive loads, providing a balance between protection against overload and nuisance tripping. This makes it particularly suitable for protecting circuits in machinery, control panels, and distribution boards where consistent operation is crucial. The compact, single-pole design conserves valuable space in electrical enclosures, a significant advantage in crowded industrial environments.
Key Application Scenarios
The Siemens 5SY6140-7CC finds its primary utility in protecting individual circuits within a larger electrical system. Its C-curve characteristic makes it well-suited for circuits with moderate inductive loads, such as lighting systems, socket outlets, and control circuits in industrial facilities, manufacturing plants, and commercial buildings. It serves as a vital component in main and sub-distribution boards, safeguarding equipment against the damaging effects of overloads and short circuits, thereby preventing downtime and extending the lifespan of electrical assets. Typical applications include protecting motors, pumps, and other machinery that may experience temporary inrush currents during startup, without compromising safety. Its single-pole configuration is ideal for single-phase AC circuits commonly found in control systems and auxiliary power supplies.
Practical System Integration Guidance
Integrating the Siemens 5SY6140-7CC into an electrical system is straightforward due to its standardized design and modular construction, typical of the Siemens SENTRON series. Installation involves mounting the breaker onto a standard DIN rail within a distribution board or enclosure. The conductor connections are made via screw-type terminals, which accommodate solid or stranded conductors ranging from 0.75mm² to 35mm². Ensuring correct termination is crucial; recommended tightening torque for the screw terminals is between 2.5 N·m and 3.5 N·m to guarantee a secure connection and prevent overheating. While the 5SY6140-7CC itself does not typically require programming, it is a fundamental protective device within a system that may incorporate programmable logic controllers (PLCs) or other intelligent devices. Its role is to provide the primary overcurrent protection, allowing downstream systems to operate reliably. Proper system design, including correct sizing of conductors and a thorough understanding of the protected load's characteristics, is essential for optimal performance.
Operation and Risk Mitigation
The Siemens 5SY6140-7CC operates automatically, interrupting the circuit when a fault current exceeds its predetermined threshold. The "C" tripping characteristic means it will trip between 5 to 10 times the rated current for short circuits. This ensures rapid disconnection during severe faults while tolerating the temporary inrush currents of inductive loads. Risk mitigation is inherent in its design and proper application. To ensure safe operation, always adhere to the stated voltage and current ratings and confirm the ambient temperature is within the specified operating range of -25°C to 55°C. For maximum safety, ensure the breaker is installed in an environment protected from dust and moisture, as indicated by its IP20 rating. Always disconnect power before performing any installation or maintenance. While specific fault codes are not typically associated with MCBs, troubleshooting usually involves identifying the cause of the overcurrent (e.g., short circuit, overloaded circuit, or faulty appliance) and addressing it before resetting the breaker.
Scalability & Long-Term Value
The Siemens 5SY6140-7CC offers significant long-term value through its compatibility with the broader Siemens SENTRON portfolio and its robust construction. While this specific model is a single-pole breaker, it can be integrated into larger electrical systems composed of multiple Siemens breakers, allowing for the protection of various circuits. Its inclusion within the established SENTRON line signifies compatibility with other Siemens components, such as busbars and enclosures, facilitating system expansion or upgrades. For applications requiring enhanced monitoring or integration with Industrial Internet of Things (IIoT) platforms, the 5SY6140-7CC serves as a foundational protective device. Although it does not possess built-in communication capabilities, its reliable performance ensures the stability of the overall electrical infrastructure, which is a prerequisite for integrating advanced digital solutions in smart industrial environments. The typical mechanical service life of 10,000 operating cycles further underscores its durability and long-term operational value.
Frequently Asked Questions (FAQs)
1. What is the primary function of the Siemens 5SY6140-7CC?
The Siemens 5SY6140-7CC is primarily designed for overcurrent protection. It acts as an automatic safety device to interrupt electrical circuits. This prevents damage to equipment and reduces fire hazards.
This breaker protects against both short circuits and overload conditions. It ensures the safe operation of electrical installations. Its reliable tripping mechanism is key to its function.
It is commonly used in industrial and commercial settings. It safeguards individual circuits within larger electrical distribution systems.
2. What does the "C" in the tripping characteristic "C" signify for the 5SY6140-7CC?
The "C" in the tripping characteristic indicates how the breaker responds to inrush currents. It is designed for loads with moderate inductive characteristics. These include motors, transformers, and lighting ballasts.
Specifically, a Type C breaker will trip between 5 to 10 times its rated current during a short circuit event. This allows for temporary surges without unnecessary tripping. It offers a balance for inductive loads.
This makes it suitable for many industrial applications where equipment may draw higher currents upon startup. It provides essential protection without causing frequent nuisance trips.
3. What are the typical applications for a 1-pole, 40A circuit breaker like the 5SY6140-7CC?
A single-pole, 40A breaker like the 5SY6140-7CC is ideal for single-phase AC circuits. These are common in many industrial control systems. They are also found in auxiliary power circuits.
It can protect smaller motors, pumps, or fans. It's also used for lighting circuits and power outlets in industrial areas. Its 40A rating suits loads that draw moderate current.
This breaker is a fundamental component in electrical distribution panels. It provides essential circuit isolation and protection in various industrial equipment.
4. What is the breaking capacity of the Siemens 5SY6140-7CC?
The Siemens 5SY6140-7CC has a rated short-circuit breaking capacity of 6kA according to EN 60898. This is a standard for residential and similar applications. It ensures protection in typical fault scenarios.
For more demanding industrial applications, it offers a higher breaking capacity of 10kA according to IEC 60947-2. This international standard is relevant for industrial control gear. It means greater fault current can be safely interrupted.
This dual rating provides flexibility. It ensures the breaker meets safety requirements across different installation standards and environments.
5. Can the Siemens 5SY6140-7CC be used in DC circuits?
Yes, the Siemens 5SY6140-7CC can be used in DC circuits, but with specific limitations. Its rated operational voltage at DC is 60V. The maximum operating voltage at DC is 72V.
It also has a breaking capacity of 15kA at DC according to IEC 60947-2. This is a significant rating for DC fault interruption. However, it is crucial to ensure the DC circuit's voltage does not exceed these limits.
It is important to consult the product manual for DC application details. Proper system design is essential when using AC-rated breakers in DC circuits.
6. What is the significance of the IP20 rating?
The IP20 rating indicates the degree of protection provided by the enclosure of the circuit breaker. "IP" stands for Ingress Protection. The first digit, "2," means it is protected against solid objects greater than 12.5mm.
The second digit, "0," signifies no specific protection against water ingress. Therefore, the breaker is protected against finger contact but not against water. This means it is suitable for indoor use in dry environments.
It is crucial to install the 5SY6140-7CC in an appropriate enclosure. This ensures it is shielded from accidental contact and environmental factors.
7. How is the Siemens 5SY6140-7CC installed in an electrical panel?
Installation involves mounting the circuit breaker onto a standard 35mm DIN rail. This is a common method in most electrical distribution panels. The breaker snaps securely onto the rail.
Connections are made via screw terminals. These terminals accept conductor sizes from 0.75mm² up to 35mm². Solid or stranded wires can be used.
Proper torque is essential for secure connections. The recommended tightening torque is between 2.5 Nm and 3.5 Nm for optimal performance and safety.
8. What is the typical mechanical service life of this circuit breaker?
The Siemens 5SY6140-7CC has a typical mechanical service life of 10,000 operating cycles. This metric refers to the number of times the breaker can be manually switched on and off. It does not account for electrical switching operations due to faults.
This considerable service life ensures long-term reliability. It minimizes the need for frequent replacements in standard operational use. It contributes to the overall value and uptime of the electrical system.
While mechanical life is high, electrical life (number of fault interruptions) depends on the severity of faults encountered. Regular inspections are still recommended.
9. Does this circuit breaker have communication capabilities for IIoT integration?
The Siemens 5SY6140-7CC, as a standard miniature circuit breaker, does not typically feature direct communication capabilities for IIoT integration. Its primary role is direct overcurrent protection. It provides foundational safety for electrical circuits.
For IIoT integration, Siemens offers advanced devices within its SENTRON portfolio. These may include circuit breakers with integrated measuring functions or communication modules. These devices transmit data to higher-level systems.
The 5SY6140-7CC can be part of a larger system that includes such intelligent devices. Its reliable operation ensures the stability of the electrical infrastructure, enabling smarter systems to function effectively.
10. What is the warranty period for the Siemens 5SY6140-7CC?
While specific warranty periods can vary by region and distributor, some suppliers indicate a 3-year warranty for new surplus units of the Siemens 5SY6140-7CC. It is always advisable to confirm the warranty terms with the specific seller at the time of purchase.
A warranty provides assurance of the product's quality and performance. It covers defects in materials or workmanship under normal operating conditions. This is crucial for industrial components.
Ensuring proper installation and operation according to Siemens' guidelines is typically a condition for warranty claims. Always refer to the official product documentation and seller information.
