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RF/EMI Shield Spiral Gasket (Inner Cord)

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  • spiral gasket inner cord material
  • spiral gasket inner cord - silicone foam
  • spiral gasket inner cord - silicone tube

Overview

  • Spiral wound RF/EMI shielding gasket is an ideal shielding material suitable for sensitive equipment requiring high electromagnetic shielding performance thanks to its excellent electromagnetic shielding effect.
     - Suitable for semiconductor manufacturing equipment (Plasma etching equipment), precision medical equipment, telecommunication equipment, military equipment, satellite equipment, etc.
  • High elasticity Sn/Ni plated BeCu or stainless steel sheet is spiraled to provide excellent elasticity, flexibility, and high shielding effectiveness.

Features

  • Superior RF/EMI shielding effectiveness of over 100 dB
  • Higher compression force than the basic spiral gasket (no inner cord type).
  • Possible to block the inflow of external contaminants such as dust and oil.
  • Spiral gasket damage due to excessive compression can be prevented by inserting a inner cord material.
  • Various compression forces by the ribbon strip thickness and spiral pitch, etc.
     (Standard force, Medium Force, Low Force)
  • O-Ring available (Precision spot welding processed)
  • RoHS Compliant

Details


Ribbon Strip Material

Manufactured by inserting a inner cord material into the basic spiral gasket, the ribbon strip has the same specifications as the basic spiral gasket.

Strip Material Sn-plated BeCu Ni-plated BeCu Stainless Steel
Strip Material Beryllium Copper C17200 304H
Temper XHM -
Electrical Conductivity 17~28 %IACS -


Inner Cord (Core) Material

- Silicone Foam (F) Silicone Rubber (A, T) Test Method
Inner Cord Color White Translucent -
Specific Gravity 1.16 g/cm³ 1.16 g/cm³ JIS K 6220
Hardness (JIS A) 53 61 JIS K 6253
Tensile Strength 91 Kgf/㎠ 104 Kgf/㎠ JIS K 6251
Elongation 320 % 365 % JIS K 6251


Types of Inner Cord

W: No Inner Cord

EMI Shielding Spiral Gasket - Cordless

A: Silicone Solid

EMI Shielding Spiral Gasket - Silicone Rubber Solid Cord

T: Silicone Tube

EMI Shielding Spiral Gasket - Silicone Rubber Tube

F: Silicone Foam

EMI Shielding Spiral Gasket - Silicone Sponge


P/N Examples

P/N Specifications
Strip Material String Outer Diameter (OD) Inner Cord (Core) Force
SBT-035W Sn-plated BeCu 3.5 mm No inner cord (Coreless) Standard
SBN-045A Ni-plated BeCu 4.5 mm Silicone solid Standard
PBT-040T Sn-plated BeCu 4.0 mm Silicone Tube Medium
FSN-050F Stainless Steel 5.0 mm Silicone Foam Low


Shield Effectiveness

[Sn-plated BeCu]
Tin-plated BeCu shield effectiveness graph
[Stainless Steel]
Stainless steel shield effectiveness graph


Compression Force by Inner Cord Material (SSN-032W/A/T/F)

  • Specimen: Stainless steel strip, String OD 3.2mm
  • The compression force is strongest in the following order: silicone solid, silicone tube, silicone foam, and coreless material.
P/N Inner Cord Compression Force (kgf/in.)
10% Comp. 20% Comp. 30% Comp. 40% Comp.
SSN-032W No Inner Cord 2.45 5.07 7.38 8.65
SSN-032F Silicone Foam 2.79 5.78 8.49 10.73
SSN-032T Silicone Tube 3.88 8.01 11.01 14.37
SSN-032A Silicone Solid 3.90 8.91 13.93 20.81


Groove Mounting

spiral gasket groove mounting


  • Recommended Groove Size
String OD [mm] Groove Size [mm]
Depth WB WT
1.0 0.75 1.35 0.96
2.0 1.50 2.70 1.92
2.2 1.65 2.97 2.11
2.4 1.80 3.24 2.30
2.6 1.95 3.51 2.50
2.8 2.10 3.78 2.69
3.0 2.25 4.05 2.88
3.2 2.40 4.32 3.07
3.4 2.55 4.59 3.26
3.6 2.70 4.86 3.46
3.8 2.85 5.13 3.65
String OD [mm] Groove Size [mm]
Depth WB WT
4.0 3.00 5.40 3.84
4.2 3.15 5.67 4.03
4.4 3.30 5.94 4.22
4.6 3.45 6.21 4.42
4.8 3.60 6.48 4.61
5.0 3.75 6.75 4.80
6.0 4.50 8.10 5.76
7.0 5.25 9.45 6.72
8.0 6.00 10.80 7.68
9.0 6.75 12.15 8.64
10.0 7.50 13.50 9.60

Applications

  • It can shield electromagnetic noise and prevent the inflows of foreign substances from the outside.
  • It can replace conductive elastomer due to its excellent electrical conductivity and sealable inner cord material properties.
  • spiral gasket with silicone cord

Product Support


How to choose a proper P/N

* Options avaiable by ribbon strip material, force, inner cord material, O-Ring, etc

Options Codes
Force S: Standard Force, P: Medium Force, F: Low Force
Strip Material BT: Sn plated BeCu, BN: Ni plated BeCu, SN: Stainless Steel
String OD (Ø) 010~100 (1.0~10.0mm)
Inner Cord (Core) W: Cordless, A: Silicone rubber solid, T: Silicone rubber tube, F: Silicone foam
O-Ring ID* R: O-Ring Inner Diameter(mm), * String type unless otherwise indicated

* O-Ring works: Excellent precise welding and durability by spot welding on connection parts
    (Depending on the string OD size and inner cord material, O-Ring’s ID may be limited.)



P/N Examples

EMI shield spiral gasket product number structure


P/N P/N Explanation
Spiral gasket product code Standard force, Sn-plated BeCu + String Ø2.5mm + Silicone tube cord
Spiral gasket product code Low force, Stainless steel + String Ø4.0mm + Silicone solid cord + O-Ring ID 50mm


Documentation

No data.