Products > Canted Coil Springs
EMI Shielding Springs | Canted Coil EMI / RFI Shielding Solutions
Reliable electromagnetic shielding, grounding, and conductivity for high-performance electronic systems.
EMI shielding springs, based on canted coil technology, provide continuous conductive paths for effective electromagnetic interference (EMI) and radio frequency interference (RFI) shielding. These springs ensure low impedance, consistent contact force, and reliable shielding performance in demanding environments.
Part of our Canted Coil Spring Solutions family, including:
Electrical Conducting Springs EMI Shielding SpringsMechanical Retention Springs
How EMI Shielding Springs Work
Canted coil springs create multiple contact points along the mating surfaces, forming a continuous conductive path that blocks electromagnetic leakage. This ensures effective shielding even under vibration, thermal expansion, or mechanical variation.
Key Benefits of EMI Shielding Springs
- Continuous conductive path for effective EMI/RFI shielding
- Low impedance contact for improved shielding effectiveness
- Stable performance under vibration and shock
- Near-constant force ensures consistent contact pressure
- Long service life compared to traditional fingerstock solutions
In addition to shielding, canted coil springs are also widely used for electrical conductivity applications and mechanical retention systems.
Continuous Contact for Effective Shielding
Unlike conventional shielding methods, EMI shielding springs maintain continuous contact along the interface, reducing gaps that can cause electromagnetic leakage.
- Improved shielding integrity
- Reduced signal leakage
- Consistent grounding performance
Near-Constant Force for Reliable Shielding
The near-constant force characteristic ensures stable contact pressure across varying tolerances, maintaining shielding effectiveness over time.
Custom Manufacturing
Design Flexibility for EMI Applications
EMI shielding performance can be optimized through design variables such as:
- Spring force and geometry
- Wire material selection
- Plating type and thickness
- Groove design and installation method
Product Specs
Specification
Our EMI Shielding Springs are available in lengths (for simple or complex groove configurations) and welded rings from 0.030” (.76mm) ID. Since every spring is designed to meet the unique requirements of your application, we don’t stock a “standard” size and type. But we do maintain a database of commonly-requested diameters and cross-sections, which can serve as a baseline for streamlined customization.
The table below outlines the standard dimensions for EMI Shielding springs.
These dimensions are subject to standard manufacturing tolerances, which can be provided upon request.
| SERIES | Load type | “A” (Metal wire) |
“B” (Minor) |
“C” (Major) |
“T” (Cut Length) |
“ID” “(Wilded ID)” |
|---|---|---|---|---|---|---|
| HD-CS-L132 | L | 0.08 | 0.62 | 0.70 | 7.60 | 1.80 |
| HD-CS-M132 | M | 0.10 | 0.62 | 0.70 | 7.60 | 1.80 |
| HD-CS-H132 | H | 0.12 | 0.65 | 0.75 | 7.70 | 1.80 |
| HD-CS-L000 | L | 0.12 | 1.40 | 1.55 | 12.90 | 2.70 |
| HD-CS-M000 | M | 0.15 | 1.40 | 1.55 | 12.90 | 2.70 |
| HD-CS-H000 | H | 0.20 | 1.20 | 1.32 | 12.20 | 2.70 |
| HD-CS-L100 | L | 0.18 | 2.00 | 2.40 | 19.80 | 4.30 |
| HD-CS-M100 | M | 0.35 | 2.00 | 2.40 | 20.10 | 4.40 |
| HD-CS-H100 | H | 0.35 | 2.00 | 2.30 | 19.80 | 4.30 |
| HD-CS-L200 | L | 0.30 | 2.80 | 3.20 | 30.10 | 6.80 |
| HD-CS-M200 | M | 0.35 | 2.80 | 3.20 | 30.10 | 6.80 |
| HD-CS-H200 | H | 0.40 | 2.80 | 3.20 | 30.10 | 6.80 |
| HD-CS-L300 | L | 0.40 | 4.00 | 4.50 | 42.70 | 9.60 |
| HD-CS-M300 | M | 0.50 | 4.00 | 4.50 | 42.70 | 9.60 |
| HD-CS-H300 | H | 0.60 | 4.00 | 4.50 | 42.70 | 9.60 |
| HD-CS-L400 | L | 0.50 | 5.50 | 6.00 | 61.20 | 14.00 |
| HD-CS-M400 | M | 0.60 | 5.50 | 6.00 | 61.20 | 14.00 |
| HD-CS-H400 | H | 0.70 | 5.50 | 6.00 | 61.20 | 14.00 |
| HD-CS-L500 | L | 0.60 | 8.20 | 9.20 | 96.40 | 22.50 |
| HD-CS-M500 | M | 0.70 | 8.20 | 9.20 | 96.40 | 22.50 |
| HD-CS-H500 | H | 1.00 | 8.20 | 9.20 | 96.40 | 22.50 |
| HD-CS-L600 | L | 0.70 | 11.40 | 12.80 | 152.00 | 37.00 |
| HD-CS-M600 | M | 1.00 | 11.40 | 12.80 | 152.00 | 37.00 |
| HD-CS-H600 | H | 1.20 | 11.40 | 12.80 | 152.00 | 37.00 |
Materials & Plating Options
Wire materials include:
- STAINLESS STEEL (302, 316, 316L)
- Beryllium copper
- Zirconium-Copper
- Other high-performance conductive alloys on request
Plating Options Include:
- Gold
- Silver
- Nickel
- Tin
Typical EMI Shielding Applications
- Electronic enclosures
- Telecommunication equipment
- Aerospace and defense systems
- Medical devices
- Industrial electronics
Not Sure Which Spring Fits Your Application?
Request Engineering Support
Need help improving EMI shielding performance? Our engineers can help optimize your design.
- ✔ Custom shielding design
- ✔ Material and plating recommendations
- ✔ Rapid prototyping
Contact us today to improve your EMI shielding performance.
Explore Other Canted Coil Spring Solutions
-
Electrical Conductivity
- Low contact resistance (< 10 mΩ)
- Multi-point contact ensures stable current transfer
- Ideal for connectors, battery contacts, and grounding systems
-
Mechanical Retention & Connection
- Controlled insertion and retention forces
- Excellent elastic recovery for repeated cycles
- Suitable for locking, latching, and connector applications
FAQ
What are EMI shielding springs?
They are spring components designed to provide continuous conductive paths for EMI/RFI shielding.
Why use canted coil springs for EMI?
They provide stable contact, low impedance, and reliable shielding under dynamic conditions.
Can they be customized?
Yes, geometry, material, and plating can all be customized.