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Spiral Wound RF/EMI Shielding Gasket

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  • Microwave shielding spiral spring gasket
  • EMI shielding spiral gasket with silicone core
  • EMI shielding spiral gasket roll packaging

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 EMI shielding effectiveness of over 100 dB
  • It could be easily cut in the longitudinal direction and easily inserted into the groove in a circular shape (Groove Mounting)
  • Edge Sn/Ni plating for corrosion resistance
  • O-Rings available (Precision spot welding processed)
  • Hardness can be adjusted according to material thickness and spiral pitch of gaskets.
  • Various spiral pitches, diameters, thicknesses, and materials are available.
  • Damage from excessive compression can be prevented using a silicone tube or silicone cord as the inner core material.
  • RoHS Compliant

Details


Product Line

* Options available such as plate material, core, edge plating, O-Rings, etc.

Options Codes
Product Code S: Spiral spring gasket
Strip(Ribbon) Material BT: Sn plated BeCu, BN: Ni plated BeCu, SN: Stainless Steel
String OD (Ø) 010~100 (1.0~10.0mm)
Core Material W: Cordless, T: Silicone rubber tube, A: Silicone rubber solid, F: Silicone foam
Options O-Rings* R: O-Ring inner diameter(mm), * String type unless indicated
Edge Plating E: Edge plating, * No edge-plating unless indicated

* Product code examples (Options selected)
    SBT-025T: Sn plated BeCu + String OD(Ø) 2.5mm + Silicone rubber tube
    SBT-025T-E: Sn plated BeCu + String OD(Ø) 2.5mm + Silicone rubber tube + Edge plating
    SBT-025T-R050: Sn plated BeCu + String OD(Ø) 2.5mm + Silicone rubber tube + O-Rings (ID 50mm)
    SBT-025T-E-R050: Sn plated BeCu + String OD(Ø) 2.5mm + Silicone rubber tube + Edge plating + O-Rings (ID 50mm)


* O-Rings: Excellent precise welding and durability by spot welding on connection parts
               (Depending on the thickness of the string OD, O-Ring’s ID may be limited.)



Material

Contents Silicone Foam Silicone Rubber Tube Test Method
Core 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
Strip (Ribbon) Material Sn/Ni plated BeCu #C17200 / Stainless steel #304H


Shield Effectiveness

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


Specification examples of SBT/SBN/SSN-024W

Structure of EMI shielding spiral gasket

Item Unit SBT-024W SBN-024W SSN-024W Test Method
Size Outer Diameter (A) mm 2.4±0.1 ESQ-612-23
Thickness (B) mm 0.08±0.004 ESQ-612-23
Pitch (C) mm 5±0.4 ESQ-612-23
Standard Length M/Roll 30 ESQ-612-23
Vertical Resistance Ω < 0.1 ESQ-612-02
Compression Recovery Rate
(25%, 150℃X100hr) 		% > 90 ESQ-612-18
Compression Force (25%) Kgf/in. 8.0±15% 7.5±15% 10.0±15% ESQ-612-27
Material - Sn plated BeCu Ni plated BeCu Stainless Steel -
Environment Friendly RoHS compliant -


Groove Mount

Groove mount EMI shielding gasket


  • Recommended Grove Size
Outer Diameter[mm] Recommended 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
Outer Diameter[mm] Recommended 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 is mainly used in precision equipment sensitive to electromagnetic waves, such as semiconductor manufacturing equipment, display production equipment, and telecommunication equipment.

  • EMI shielding spiral gasket with groove mount on case cover
  • Electromagnetic shielding spiral gasket with groove mount on the opening and closing of the enclosure
  • EMI shielding spiral metal gasket attached to silicone

Product Support


Product Number

Microwave shielding spiral spring gasket product code
Number Code Example
(1) Metal Material SBT: Sn plated BeCu
SBN: Ni plated BeCu
SSN: Stainless Steel
(2) Outer Diameter 025: 2.5mm
(3) Cord Material
(See below.)		 W: Cordless
T: Silicone rubber tube		 F: Silicone foam
A: Silicone rubber solid cord
(4) Options R: O-Ring type
050: O-Ring ID 50mm		 E: Edge plating


Cord Shapes

W: Cordless

EMI Shielding Spiral Gasket - Cordless

F: Silicone Sponge

EMI Shielding Spiral Gasket - Silicone Sponge

T: Silicone Rubber Tube

EMI Shielding Spiral Gasket - Silicone Rubber Tube

A: Silicone Rubber Solid

EMI Shielding Spiral Gasket - Silicone Rubber Solid Cord


Part Numbers by Resiliencies

OD(Ø)* Stainless Steel Tin-plated Be/Cu
Standard Force Mid Force Low Force Standard Force Mid Force Low Force
Ø 1.0 SSN-010W PSN-010W - SBT-010W PBT-010W -
Ø 2.0 SSN-020W PSN-020W - SBT-020W PBT-020W -
~ ~ ~ ~ ~ ~ ~
Ø 9.0 SSN-090W PSN-090W FSN-090W SBT-090W PBT-090W FBT-090W
Ø 10.0 SSN-100W PSN-100W FSN-100W SBT-100W PBT-100W FBT-100W

* Outer diameter can be manufactured in increments of 0.1mm.