Canted Coil Springs for EMI Shielding | Reliable EMI & Electrical Contact Solutions
캔트 코일 스프링 provide consistent contact force, excellent conductivity, and long service life for EMI shielding and electrical contact applications. Learn how they improve RF shielding performance.
Canted Coil Springs for EMI Shielding and Electrical Contact Applications
In high-frequency electronic systems, maintaining reliable electrical contact and effective EMI shielding is critical to performance, safety, and regulatory compliance. Traditional EMI gaskets and contact solutions often suffer from uneven force distribution, material fatigue, or inconsistent conductivity over time.
캔트 코일 스프링 have emerged as a highly effective solution for EMI shielding and electrical contact applications, offering constant force, excellent electrical conductivity, and long-term reliability even under demanding operating conditions.
What Is a Canted Coil Spring?
A canted coil spring is a precision-engineered spring formed by coiling wire at a specific angle rather than perpendicular to the spring axis. This unique geometry allows the spring to deliver nearly constant force across a wide deflection range.
Unlike conventional compression springs, canted coil springs maintain stable contact pressure, making them ideal for applications where consistent electrical performance is required.
Canted coil springs—also called slanted coil springs, canted springs, or spiral spring EMI shielding rings—are widely used in critical sectors such as medical devices, aerospace connectors, electric mobility, semiconductor equipment, and EMI shielding systems. Among all performance-related issues, one failure mode stands out due to its direct impact on system reliability: Loss of Deflection, also known as insufficient compression stroke, reduced elastic recovery, or premature spring softening.
Why Canted Coil Springs Are Ideal for EMI Shielding
Effective EMI shielding relies on continuous metal-to-metal contact between mating surfaces. Any gap, loss of force, or uneven pressure can significantly reduce shielding effectiveness.
Canted coil springs offer several advantages for EMI shielding applications:
- Constant Contact Force
Maintains stable pressure despite vibration, thermal expansion, or tolerance variations. - Excellent Electrical Conductivity
Available in copper alloys, stainless steel, or plated materials to ensure low contact resistance. - Wide Deflection Range
Accommodates enclosure tolerances without sacrificing performance. - Long Service Life
Reduced stress concentration minimizes fatigue and force relaxation.
Electrical Contact Performance Advantages
For electrical contact applications, reliability is defined by stable resistance and repeatable performance over thousands of cycles.
Canted coil springs provide:
- Low and consistent contact resistance
- High current-carrying capability
- Superior performance in dynamic or vibration-prone environments
- Compatibility with harsh conditions such as high temperature or corrosion
These characteristics make them well-suited for connectors, grounding contacts, and RF interfaces.
Typical EMI Shielding Applications
Canted coil springs are widely used in:
- RF and microwave enclosures
- Shielded electronic housings
- Semiconductor manufacturing equipment
- Aerospace and defense electronics
- Medical imaging and diagnostic systems
They can be installed in grooves or used as spring contacts to create a continuous EMI seal around enclosures.
Material Selection for EMI 차폐 스프링
Choosing the right material is essential for EMI performance:
- 구리 합금 – Excellent conductivity for EMI shielding
- 스테인리스 스틸 – Good mechanical strength with optional conductive plating
- Hastelloy or Nickel Alloys – High temperature and corrosion resistance
Surface plating such as silver or gold can further enhance conductivity and corrosion resistance.
결론
Canted Coil Springs offer a reliable and high-performance solution for EMI shielding and electrical contact applications. Their ability to deliver constant force, maintain low contact resistance, and withstand demanding environments makes them an ideal choice for modern electronic systems requiring consistent EMI protection.
For more details,please email to sale01@handashielding.com