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Coaxial vs High Voltage Hermetic Feedthroughs: Electrical Performance Compared
2026-06-17
Linconn
37
Hermetic feedthroughs play a critical role in various industries, such as aerospace, medical, and industrial automation, by providing a sealed electrical path through the insulation of a product. They are essential for maintaining the integrity of electronic devices and systems. This article delves into the electrical performance comparison between coaxial and high voltage hermetic feedthroughs, with a focus on Linconn's expertise and technical specifications.
Overview of Hermetic Feedthroughs
Definition and Importance
Hermetic feedthroughs are connector assemblies that enable the passage of electrical signals across a sealed enclosure, maintaining a tight seal to prevent contaminants from entering the enclosure. These feedthroughs are crucial in applications where high reliability and performance are paramount, ensuring that the internal environment is protected from the external environment.
Applications
Hermetic feedthroughs are used in a wide range of applications, including:
- Aerospace: Satellite communication systems, missile guidance systems, and other space exploration equipment.
- Medical Devices: Implantable medical devices, MRI machines, and patient monitoring systems.
- Industrial Automation: High-precision machinery, robotics, and process control systems.
- Military Equipment: Radar systems, sensor arrays, and communication devices.
Key Requirements
The key requirements for high-performance hermetic feedthroughs include:
- Seal Integrity: Maintaining a hermetic seal to prevent environmental contaminants.
- Electrical Performance: Ensuring reliable and stable electrical signal transmission.
- Mechanical Durability: Withstanding harsh operating conditions, including vibration, temperature variations, and high pressures.
- Materials: High-quality materials that resist corrosion and maintain performance over time.
Coaxial Feedthroughs
Structural Differences
Coaxial feedthroughs are designed to carry RF (radio frequency) signals and are characterized by their cylindrical geometry. They consist of a central conductor surrounded by an insulator, followed by a shield. This structure ensures reliable signal transmission over a wide frequency range.
Electrical Performance
- Electrical Conductivity: Coaxial feedthroughs provide high electrical conductivity, enabling efficient signal transmission.
- Insulation Performance: Excellent insulation to minimize signal loss and interference.
- Dielectric Strength: Sufficient dielectric strength to prevent electrical breakdown.
- Breakdown Voltage: Lower compared to high voltage feedthroughs, typically around 5kV to 10kV.
- Leakage Current: Low leakage current, ensuring minimal signal interference.
- Temperature Range: Wide range, suitable for various environmental conditions.
- Operating Environment: Applicable in a wide range of operating environments, from laboratory settings to industrial applications.
Technical Specifications
- Conductor Material: Typically made of silver-plated copper or other conductive materials.
- Insulator Material: High-dielectric strength materials, such as PTFE or PEEK.
- Shielding Material: Often made of silver-plated beryllium copper or stainless steel, providing excellent shielding properties.
High Voltage Feedthroughs
Structural Differences
High voltage hermetic feedthroughs are designed to transmit high-voltage signals, typically in the range of kilovolts. They feature robust insulation layers and high-dielectric strength materials to withstand the high voltages and prevent electrical breakdown.
Electrical Performance
- Electrical Conductivity: Extremely high electrical conductivity, enabling the transmission of high-voltage signals with minimal loss.
- Insulation Performance: Superior insulation performance to handle high-voltage environments.
- Dielectric Strength: Very high dielectric strength to prevent electrical breakdown, often exceeding 20kV/mm.
- Breakdown Voltage: Higher breakdown voltage compared to coaxial feedthroughs, typically exceeding 10kV.
- Leakage Current: Minimal leakage current, ensuring efficient signal transmission and high performance.
- Temperature Range: Wide temperature range, suitable for harsh environments with extreme temperatures.
- Operating Environment: Designed for harsh environments, including high-voltage applications in industrial settings.
Technical Specifications
- Conductor Material: High-purity copper or silver-plated copper for optimal electrical conductivity.
- Insulator Material: High-dielectric strength materials, such as ceramic or PTFE, to handle high voltages.
- Shielding Material: Robust shielding materials, often with additional insulation layers to prevent electrical breakdown.
Technical Comparison of Coaxial and High Voltage Hermetic Feedthroughs
Electrical Conductivity
- Coaxial Feedthroughs: High electrical conductivity, suitable for efficient signal transmission over a wide frequency range.
- High Voltage Feedthroughs: Extremely high electrical conductivity, capable of handling high-voltage signals without significant loss.
Insulation Performance
- Coaxial Feedthroughs: Excellent insulation performance, minimizing signal loss and interference.
- High Voltage Feedthroughs: Superior insulation performance, designed to handle high-voltage environments with minimal risk of electrical breakdown.
Dielectric Strength
- Coaxial Feedthroughs: Sufficient dielectric strength to prevent electrical breakdown in typical operating conditions.
- High Voltage Feedthroughs: Very high dielectric strength, exceeding 20kV/mm, ensuring reliable performance in high-voltage environments.
Breakdown Voltage
- Coaxial Feedthroughs: Lower breakdown voltage, typically around 5kV to 10kV.
- High Voltage Feedthroughs: Higher breakdown voltage, often exceeding 10kV, making them suitable for high-voltage applications.
Leakage Current
- Coaxial Feedthroughs: Low leakage current, ensuring minimal signal interference.
- High Voltage Feedthroughs: Minimal leakage current, optimizing signal transmission efficiency.
Temperature Range
- Coaxial Feedthroughs: Wide temperature range, suitable for various environments.
- High Voltage Feedthroughs: Wide temperature range, often more extensive to accommodate harsh environments with extreme temperatures.
Operating Environment
- Coaxial Feedthroughs: Applicable in a wide range of environments, from laboratory settings to industrial applications.
- High Voltage Feedthroughs: Designed for harsh environments, including high-voltage industrial settings.
Table: Technical Comparison of Coaxial and High Voltage Hermetic Feedthroughs
| Feature | Coaxial Feedthroughs | High Voltage Feedthroughs |
|---|---|---|
| Electrical Conductivity | Typically high | Extremely high due to high voltage |
| Insulation Performance | Excellent | Superior due to insulation layers |
| Dielectric Strength | Sufficient | Very high to handle high voltage |
| Breakdown Voltage | Lower compared to HV | Higher, often >10kV |
| Leakage Current | Low | Minimal |
| Temperature Range | Wide range | Wide range, often more extensive |
| Operating Environment | Various environments | Harsh environments with high volts |
Advantages of Linconn Hermetic Feedthroughs
Expertise and Customization
Linconn has extensive experience in designing and manufacturing hermetic feedthroughs, with a focus on meeting the specific needs of various industries. Our engineers work closely with clients to provide custom solutions tailored to their unique requirements.
Quality Assurance
Linconn employs rigorous quality assurance processes to ensure that all hermetic feedthroughs meet the highest standards of reliability and performance. Our products undergo thorough testing and inspection at every stage of production, ensuring that they meet stringent specifications.
Diverse Range of Products
Linconn offers a wide range of hermetic feedthroughs, including coaxial and high voltage feedthroughs, to cater to different applications. Our extensive product line enables us to provide solutions for a variety of industries and applications, ensuring that clients find the right feedthroughs to meet their needs.
Technical Support and Service
Linconn provides comprehensive technical support and service to assist clients throughout the product lifecycle. Our team of experts is available to answer questions, provide guidance, and offer solutions to any challenges that arise. In addition, we offer ongoing support to ensure that our clients continue to achieve optimal performance from their hermetic feedthroughs.
Conclusion
In summary, this comparison highlights the key differences between coaxial and high voltage hermetic feedthroughs in terms of electrical performance. Coaxial feedthroughs are well-suited for applications requiring reliable RF signal transmission, while high voltage feedthroughs excel in high-voltage environments with demanding requirements. Linconn's expertise and technical prowess make us a reliable partner for designing and manufacturing hermetic feedthroughs that meet the highest standards of performance and reliability.
By understanding the specific needs of your application, you can choose the right type of hermetic feedthrough. Whether you require a reliable coaxial feedthrough for RF signal transmission or a high voltage feedthrough for demanding high-voltage environments, Linconn's products offer the performance and reliability you need.
Linconn Electronic Technology Co., Ltd, founded in 2012, is a professional designer and manufacturer specializing in circular connectors, such as push pull connectors, M12 connectors, HRS connectors, and more than 10,000 kinds of various connectors. Our factory is located in ShenZhen, China, covering an area of 4,000 square meters, with over 150 skilled workers. We have passed the ISO90001 quality management system certification, ensuring consistent quality and reliability in all our products.
At Linconn, we are committed to providing the highest quality hermetic feedthroughs that meet the demands of various industries. Our extensive expertise, custom solutions, and extensive technical support make us the ideal partner for your hermetic feedthrough needs.
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