EMI Absorber Sheet

EMI Absorber Sheet

  • EMI-Microwave-Absorber-Sheet-1
  • EMI-Microwave-Absorber-Sheet-2
  • EMI-Microwave-Absorber-Sheet-3

Overview

  • Flexible EMI Absorber Sheet, a type of EMI Absorbing Materials, is manufactured in sheet form by dispersing metal magnetic powder and resin.
  • EMI problem is solved by suppressing interference between circuits in electronic devices or controlling dielectric coupling between adjacent components, and it eventually minimizes noise that causes malfunction to 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 tape to the surface of flexible absorbing sheet.
  • Manufactured in roll or sheet type and can be processed into various shapes depending on the application.
  • Possible to replace Ferrite Core or Ferrite Sheet
  • Eco-friendly product (RoHS Compliant, Halogen-Free, UL94-V0)

Magnification pictures of absorber surface and section
  • EMI-Microwave-Absorber-Surface-Magnification

    300 times magnification of surface

  • EMI-Microwave-Absorber-Section-Magnification

    1000 times magnification of section


Details (SRA Series)

Sheet Type (Low Permeability)

Specifications
Part No. SRA461 SRA47 SRA48 SRA31 SRA61 SRA62 SRA63 SRA410
Structure Single layer
Frequency Band 10MHz ~ 6GHz
Permeability [μ'@3㎒] 50 80 100 130 100 130 150 100
Thickness [㎛] 30~500 30~300 10
Temperature [℃] -30~85 -30~100 -30~85
Density [g/㎤] 3.6 3.7 3.7 3.7 3.1 3.4 3.6 3.5
Thermal Conductivity [W/mK] 0.5
Hardness [Shore A] 90 95 90
Tensile Strength [kgf/㎟] 4 3 1
Elongation [%] 5 2 4
Surface Resistance [Ω/□] > 1 x 106 > 1 x 105
Eco-friendly RoHS, Halogen free
Flame Class UL94-V0
Size Standard 210㎜ x 300㎜
Maximum 350㎜ x 640㎜


Sheet Type (High Permeability)

Specifications
Part No. SRA35 SRA34 SRA331 SRA36 SRA37 SRA617*
Structure Single layer
Frequency Band 10MHz ~ 6GHz
Permeability [μ'@3㎒] 160 190 210 250 300 170
Thickness [㎛] 30~500 30~300 30~200
Temperature [℃] -30~85 -30~150
Density [g/㎤] 3.8 4.0 3.8
Thermal Conductivity [W/mK] 0.5
Hardness [Shore A] 90 95
Tensile Strength [kgf/㎟] 4 8 3 10
Elongation [%] 5 6 2 3
Surface Resistance [Ω/□] > 1 x 106 > 1 x 104 > 1 x 106
Eco-friendly RoHS, Halogen free
Flame Class UL94-V0 UL94HB
Size Standard 210㎜ x 300㎜
Maximum 350㎜ x 640㎜

* SRA617: Possible to process reflow soldering up to 260℃



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-V0
Size Standard 300㎜ x 20M
Maximum 350㎜ x 100M


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

Applications

  • EMI-Microwave-Absorber-on-Heat-Source

    Direct attachment on noise source

  • EMI-Microwave-Absorber-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

EMI_Absorber_Sheet
Number Code Example
(1) Product Code SRA (For EMI)
(2) Serial Number 71R: Roll type
(3) Thickness (T) 0500: 5.0mm, 0010: 0.1mm
(4) Adhesive Tape T: Single-sided tape
TT: Double-sided tape
ST: Thermally conductive single-sided tape
DT: Thermally conductive double-sided tape
N: No tape