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EMI Shielding Springs | Canted Coil EMI / RFI Shielding Solutions

Reliable electromagnetic shielding, grounding, and conductivity for high-performance electronic systems.

Handa EMI Shielding Springs are components designed to block or reduce electromagnetic interference (EMI) in electronic devices. They are made from conductive materials like copper or stainless steel to create a shield that protects sensitive electronics from external electromagnetic signals. These springs combine effective EMI protection with mechanical flexibility and durability, ensuring reliable performance in various applications, including electronics, communications, automotive, and medical devices.

EMI Shielding Springs

Part of our Canted Coil Spring Solutions family, including:

Electrical Conducting Springs EMI Shielding SpringsMechanical Retention Springs

Custom Manufacturing

Custom EMI Shielding Springs

According to the customer’s requirements, Handa Shielding provide drawings or dimensions and working conditions requirements for product customization. If necessary, please contact sunny@handashielding.com and a professional engineer will answer your questions.
Thank you!

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Custom EMI Shielding Springs

EMI Shielding Springs 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

 

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.

Materials & Plating

EMI shielding spring are precision-manufactured from premium copper alloy and stainless steel base wire materials, chosen for their excellent combination of mechanical and electrical properties.

Wire materials include:

  • STAINLESS STEEL (302, 316, 316L)
  • Beryllium copper
  • Zirconium-Copper
  • Other high-performance conductive alloys on request

Plating Options Include:

  • Gold – high reliability applications
  • Silver – best electrical conductivity
  • Nickel – wear and corrosion resistance
  • Tin – cost-effective solution

Key Features and Functions

EMI Shielding Springs play a critical role in protecting sensitive electronics from unwanted electromagnetic signals, ensuring optimal performance and reliability.
  • 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

Applications

EMI Shielding Springs play a vital role in maintaining the performance and reliability of electronic and electrical devices across various industries.
  • Electronic enclosures
  • Telecommunication equipment
  • Aerospace and defense systems
  • Medical devices
  • Industrial electronics

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
Consumer products component manufacturing


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.

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