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Noise Suppression Sheet

  • Flexible EMI Absorber Sheet
  • Microwave absorber ferrite sheet replacement
  • Noise suppressing magnetic sheet

Overview

  • Noise suppression sheet (Microwave absorber) is electromagnetic shield material made of magnetic materials and resin that can suppress noise in a broader band by adding a metal flake.
  • Noise suppressing magnetic sheets suppress interference between circuits in electronic devices or control the dielectric coupling between adjacent components to minimize noise that causes malfunction of electronic devices.
  • Noise can be removed in 10 MHz to 6 GHz frequency bands.

Features

  • High permeability products available up to 300μ'
  • Non-electrical conductivity
  • Available in thickness of 30㎛ ~ 500㎛
  • Easy to attach the tape to the surface of the flexible absorbing sheet.
  • Manufactured in roll or sheet type and can be processed into various shapes depending on the application.
  • Eco-friendly product (RoHS Compliant, Halogen-Free), UL94 V-0

Magnification pictures of absorber surface and section
  • Noise suppressing magnetic sheet surface closeup

    300 times magnification of surface

  • Noise suppressing magnetic sheet section closeup

    1000 times magnification of section


Details (SRA Series)


Sheet Type (Low Permeability)

Specifications
Part No. SRA461 SRA47 SRA48 SRA31 SRA61 SRA62 SRA63
Structure Single layer
Frequency Band 10MHz ~ 6GHz
Permeability [μ'@3㎒] 50 80 100 130 100 130 150
Thickness [㎛] 30~500 30~300
Temperature [℃] -30~85 -30~100
Density [g/㎤] 3.6 3.7 3.7 3.7 3.1 3.4 3.6
Thermal Conductivity [W/mK] 0.5
Hardness [Shore A] 90 95
Tensile Strength [kgf/㎟] 4 3
Elongation [%] 5 2
Surface Resistance [Ω/□] > 1 x 106
Eco-friendly RoHS Compliant, Halogen free
Flame Class UL94 V-0
Size Standard 210㎜ x 300㎜
Maximum 350㎜ x 640㎜


Sheet Type (High Permeability)

Specifications
Part No. SRA35 SRA34 SRA331 SRA36 SRA37
Structure Single layer
Frequency Band 10MHz ~ 6GHz
Permeability [μ'@3㎒] 160 190 210 250 300
Thickness [㎛] 30~500 30~300
Temperature [℃] -30~85
Density [g/㎤] 3.8 4.0
Thermal Conductivity [W/mK] 0.5
Hardness [Shore A] 90
Tensile Strength [kgf/㎟] 4 8 3
Elongation [%] 5 6 2
Surface Resistance [Ω/□] > 1 x 106 > 1 x 104 > 1 x 103
Eco-friendly RoHS Compliant, Halogen free
Flame Class UL94 V-0
Size Standard 210㎜ x 300㎜
Maximum 350㎜ x 640㎜


Permeability
  • Graph-Permeability- SRA3x-SRA4x
  • Graph-Permeability-SRA6x


Reflection Loss
  • Graph-Reflection-Loss-SRA3x-SRA4x
  • Graph-Reflection-Loss-SRA6x


Roll Type (EMI Solution)

Specifications
Part No. SRA71R SRA72R SRA73R
Structure Single layer
Frequency Band 10MHz ~ 6GHz
Permeability [μ'@3㎒] 100 80 60
Thickness [㎛] 35 ~ 150
Temperature [℃] -30 ~ 85
Density [g/㎤] 2.5
Thermal Conductivity [W/mK] 0.1
Hardness [Shore A] 80
Tensile Strength [kgf/㎟] 5
Elongation [%] 2
Surface Resistance [Ω/□] > 1 x 106
Eco-friendly RoHS, Halogen free
Flame Class UL94 V-0
Size Standard 300㎜ x 20M
Maximum 350㎜ x 100M


  • Permeability
    Graph-Permeability-SRA7x
  • Refection Loss
    Graph- Reflection-Loss-SRA7x

Applications

  • Noise suppressing magnetic sheet on Heat Source

    Direct attachment on noise source

  • Flexible magnetic sheet for Cable

    Absorber in communication cable

  • EMI-Microwave-Absorber-on-PCB

    Attaching on partial area of PCB surface


  • EMI-Microwave-Absorber-for-Ferrite-Core

    Replacing noise filter

  • EMI-Microwave-Absorber-Band-on-FFC

    Band type absorber wrapping over FFC


Product Support

Product Number

Microwave absorber product code
Number Code Example
(1) Product Code SRA (For EMI)
(2) Serial Number 71R: Roll type
(3) Thickness (T) 0020: 0.20mm, 0010: 0.10mm
(4) Adhesive Tape T: Single-sided tape
N: No tape