Siemens 5SY6216-8CC Protection Circuit Breaker for Electrical Systems 2P 16A
Siemens 5SY6216-8CC Protection Circuit Breaker: Precision Power Management for Demanding Electrical Systems
The Siemens 5SY6216-8CC is a high-performance, two-pole (2P) miniature circuit breaker (MCB) engineered for robust protection of electrical systems. Rated at 16A with a tripping characteristic 'D', this MCB offers superior defense against overcurrents and short circuits, crucial for maintaining operational integrity in industrial and commercial environments. Its 6kA breaking capacity ensures safety during fault events, while its design facilitates reliable integration into modern electrical panels.
Product Specifications
| Specification | Value |
| :----------------------------- | :---------------------------------------- |
| Manufacturer | Siemens |
| Product Number | 5SY6216-8CC |
| Number of Poles | 2 (2P) |
| Rated Current | 16A |
| Tripping Characteristic | D |
| Rated AC Voltage | 400V |
| Breaking Capacity (Icn) | 6kA (according to EN 60898) |
| Insulation Voltage (Ui) | 440V |
| Overvoltage Category | 3 |
| Degree of Pollution | 3 |
| Type of Voltage | AC |
| Frequency | 50/60 Hz |
| Installation Depth | 70 mm |
| Width (Number of Pitch Units) | 2 |
| Mounting Type | Quick assembly system / DIN rail mount |
| Protection Class | IP20 (with connected conductors) |
| Mechanical Service Life | 10,000 operating cycles (typical) |
| Ambient Temperature | -25°C to +55°C |
| Halogen-Free | Yes |
| Sealable | Yes |
| Touch Protection | Yes |
Core Features & Market Positioning
The Siemens 5SY6216-8CC stands out in the market due to its 'D' tripping characteristic, which is specifically designed for applications with high inrush currents, such as motor control circuits or transformer secondaries. This characteristic provides a magnetic trip point of 10 to 20 times the rated current, allowing for temporary current surges without nuisance tripping, while still offering rapid protection against severe short circuits. Its robust construction and adherence to international standards like EN 60898 and IEC 60947-2 underscore its reliability and suitability for demanding industrial settings. As part of Siemens' SENTRON series, it benefits from a reputation for quality and integration within broader Siemens power distribution solutions.
Key Application Scenarios
This circuit breaker is ideally suited for protecting circuits in industrial automation, machine tools, and control cabinets where inductive loads are prevalent. Its 'D' curve is particularly advantageous for safeguarding motors, transformers, and power supplies that experience significant inrush currents during startup. It also serves as a reliable component in building installations requiring enhanced protection for sensitive equipment or where selectivity between protective devices is paramount. The two-pole design ensures complete isolation of both line and neutral conductors, enhancing safety during maintenance.
Practical System Integration Guidance
Installation of the Siemens 5SY6216-8CC is streamlined by its DIN rail mount compatibility and quick assembly system, requiring no special tools for mounting or dismounting. It features identical terminals at both the top and bottom for flexible infeed options. Ensure proper conductor termination with a tightening torque of 2.5-3 N·m for secure connections. It's essential to connect conductors with appropriate cross-sectional areas, ranging from 0.75 mm² to 35 mm² for solid conductors. Compatibility with other Siemens SENTRON components, such as busbars and supplementary devices, allows for seamless integration into comprehensive protection and distribution systems.
Operation and Risk Mitigation
The 5SY6216-8CC operates via a thermal-delayed overload release and an instantaneous electromagnetic release. The thermal release provides protection against sustained low-level overcurrents, while the electromagnetic release handles sudden, high short-circuit currents. Its clear switch position indication enhances operational visibility. To mitigate risks, always ensure the correct tripping characteristic is selected for the connected load. Periodic inspection for visible damage and ensuring all connections are tight are standard safety practices. The IP20 protection class indicates it must be installed within an enclosure to prevent contact with live parts.
Scalability & Long-Term Value
As part of the Siemens SENTRON portfolio, the 5SY6216-8CC offers excellent compatibility with a wide range of Siemens low-voltage components and systems. This inherent interoperability simplifies system expansion and upgrades, ensuring that investments in Siemens electrical infrastructure retain their value. Its integration capabilities also align with the growing trend towards digitalization and the Industrial Internet of Things (IIoT), enabling its participation in networked power monitoring and control solutions.
Frequently Asked Questions (FAQs)
1. What is the primary function of the Siemens 5SY6216-8CC circuit breaker?
This device functions as a miniature circuit breaker. It protects electrical circuits from damage caused by overcurrents and short circuits.
It offers a high breaking capacity of 6kA, ensuring safety during fault conditions. Its two-pole design is crucial for complete circuit isolation.
The breaker is specifically designed for industrial applications, offering reliable performance and long-term operational stability.
2. What does the 'D' tripping characteristic signify for the 5SY6216-8CC?
The 'D' characteristic is for high inrush currents. It allows for temporary surges without tripping.
This makes it ideal for inductive loads like motors and transformers. The magnetic trip is set between 10-20 times the rated current.
It provides essential protection while accommodating startup current demands. This prevents nuisance tripping in demanding applications.
3. Can the Siemens 5SY6216-8CC be used in DC circuits?
Yes, this breaker can operate in DC circuits. Its rated DC voltage is up to 60V.
The breaker's robust design ensures protection in mixed AC/DC environments. Always verify system voltage compatibility.
It provides a reliable solution for DC power distribution needs. This offers flexibility in mixed-use electrical systems.
4. What is the breaking capacity of the 5SY6216-8CC?
The breaker has a breaking capacity of 6kA. This is in accordance with EN 60898 standards.
This rating signifies its ability to safely interrupt fault currents. It ensures protection for the connected circuits and equipment.
Higher breaking capacities are available in other Siemens series if needed. This 6kA rating is suitable for many standard industrial applications.
5. How does the 5SY6216-8CC differ from other Siemens circuit breakers like the 5SY6216-7?
The primary difference lies in the tripping characteristic. The 5SY6216-8CC features a 'D' curve, while the 5SY6216-7 typically has a 'C' curve.
A 'C' curve is for general use, with a magnetic trip of 5-10 times the rated current. It's suited for resistive and slightly inductive loads.
The 'D' curve is for high inrush loads, offering greater tolerance for startup surges. This makes the 5SY6216-8CC better for motors and transformers.
6. What are the physical dimensions and mounting requirements?
This breaker has a width of 2-module units. Its installation depth is 70 mm.
It mounts on a standard DIN rail using a quick assembly system. This ensures fast and secure installation.
The dimensions are standardized for easy integration into electrical panels and enclosures. It offers convenient panel space utilization.
7. What is the typical service life of the Siemens 5SY6216-8CC?
The breaker has a mechanical service life of 10,000 operating cycles. For the 5SY6216-8 model, it's 20,000 cycles.
This indicates its durability under normal operational conditions. It is designed for long-term industrial use.
Electrical endurance varies based on load and switching frequency. Regular checks ensure optimal performance over its lifespan.
8. Is the 5SY6216-8CC suitable for residential applications?
While designed for industrial use, its 'D' characteristic is less common for standard residential circuits. Residential applications typically use 'B' or 'C' curves.
The 'D' curve's higher magnetic trip point might lead to nuisance tripping in simple home circuits. It's more suited for loads with high starting currents.
For residential protection, Siemens offers breakers with 'B' and 'C' characteristics. These are optimized for typical household electrical loads.
9. What are the environmental operating conditions for this circuit breaker?
The 5SY6216-8CC can operate in ambient temperatures from -25°C to +55°C. It also has storage temperature limits of -40°C to +75°C.
The device is rated for up to 95% relative humidity at 55°C. It is designed to withstand typical industrial environmental variations.
Its construction includes touch protection and is halogen-free, contributing to safety and environmental compliance. It meets rigorous safety and environmental standards.
10. How can I integrate the 5SY6216-8CC with other Siemens automation components?
The 5SY6216-8CC is part of the Siemens SENTRON family. It integrates seamlessly with other SENTRON devices like busbars.
It is compatible with Siemens' broader low-voltage systems and automation solutions. This ensures system interoperability and scalability.
Refer to Siemens' technical documentation and SiePortal for detailed integration guides. This facilitates efficient system design and commissioning.
