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EMI Absorber Sheet
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.
- Eco-friendly product (RoHS Compliant, Halogen-Free, UL94-V0)
Magnification pictures of absorber surface and section
300 times magnification of surface
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
Reflection Loss
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
-
Refection Loss
Applications
-
Direct attachment on noise source
-
Absorber in communication cable
-
Attaching on partial area of PCB surface
-
Replacing noise filter
-
Band type absorber wrapping over FFC
Product Support
Product Number
| 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 |