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EMI Absorbing & Magnetic Shielding
VIEW PRODUCTSLess EMI. Less noise. Better signal integrity.
To operate efficiently, electrical systems depend on effective noise suppression. But devices are designed to be increasingly smaller and closer together, and they must operate across a broader range of electromagnetic environments. EMI control is a real challenge. 3M delivers, with material solutions based on decades of expertise in EMI absorbing and magnetic shielding. That means high magnetic absorbing capabilities, high permeability, low resistivity options and more – for improved signal integrity across frequencies from <1 MHz to 10 GHz. It also means the ability to target frequencies for EMI management that meets your specific design challenges and EMC requirements.
Benefits
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Noise SuppressionHelps absorb EMI noise or influences electro-magnetic (EM) fields to help improve signal integrity for optimal device performance
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Choice of Magnetic Loss and BandwidthsAbsorbers are available in a range of magnetic loss values to absorb high levels of noise at your target frequency range
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ReliabilityTested to perform in a broad range of applications and environments
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Design FreedomQuick and easy application in lab or real-world settings with peel and stick solutions at any point in the design process
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EMI Absorbers
3M material science at work - flexible composite materials incorporating specialized magnetic particles and a non-conductive PSA to absorb EMI across a wide frequency range. Very thin versions allow for easy workability and fewer redesigns. 3M also offers a hybrid version that performs both electromagnetic shielding and absorbing across broadband frequencies.
Magnetic Shielding Material
Thin magnetic materials helps you protect components and circuits and improve your system efficiency. High magnetic permeability and low magnetic loss help enable flux field redirection for applications less than 15 MHz.
Key applications for 3M™ EMI Absorbers
See how our broad range of flexible composite materials can absorb EMI, with benefits like improved signal integrity, higher antenna performance and reduced EMI interference within a device. Most of our 3M magnetic absorbers feature pressure-sensitive adhesives for ease of application.
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Attach to noisy component
PCB/FPC traces are potential sources of radiated EMI, and they can propogate EMI signals between active modules. These EMI signals can be mitigated by placing absorbers over the affected traces. Similarly, enclosures such as shielding cans are potential sources of externally radiated EMI emissions as well as noise coupled between elements inside an enclosure. Here, placing a thin magnetic absorber over or inside of the conductive shield can significantly help improve the overall electromagnetic environment while conserving space.
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Featured products:
For traces and small enclosures
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Sub 2.5 GHz:
3M™ Flux Field Directional Material EM25TP -
2-7 GHz:
COMING SOON: 3M™ EMI Absorber AB3000 Series -
Sub- 2.5 GHz and harsh environments:
COMING SOON: 3M™ EMI Absorber AB8000 Series -
Medium noise reduction and longer shelf life:
COMING SOON: 3M™ EMI Absorber AB7000E Series -
Large enclosures:
3M™ EMI Absorber AB5000HF and 3M™ EMI Absorber AB5000SHF Series
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Attached to microprocessors
High clock frequencies of data modules and ICs can lead to induced internal and external EMI in nearby environments. This EMI noise can affect telecom and Wi-Fi frequency bands. This can be prevented by placing absorbers with high magnetic loss to capture both clock frequencies and their harmonics. Thin absorbers can be easily placed over aggressor circuits to suppress noise. ICs can also create heat, so silicone resin absorbers are a good choice for noise suppression in elevated temperatures.
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Featured products:
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Sub 2.5 GHz and harsh environments:
COMING SOON: 3M™ EMI Absorber AB8000 Series -
Stable resin:
COMING SOON: 3M™ EMI Absorber AB7000E Series
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Insert between module
Noise from PCB stacks could be due to trace-to-trace or inductor-to-trace coupling. Unlike metal foils, thin absorbers with high magnetic shielding and loss will not support surface currents that could lead to additive EMI problems. 3M offers very thin, high performance EMI absorbers to fill gaps without electrical system redesign. 3M also offers materials with high magnetic shielding and EMI absorbing performance.
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Featured products:
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High magnetic shielding and absorbing efficiency up to 2.5 GHz:
3M™ Flux Field Directional Material EM25TP -
Medium noise reduction and longer shelf life:
COMING SOON: 3M™ EMI Absorber AB7000E Series -
2-7 GHz:
COMING SOON: 3M™ EMI Absorber AB3000 Series
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Cable wrapping/attachment
Whether conventional or flex flat, cables can emit EMI themselves and act as antennae for external EMI signals that can couple into connected components. Flex flat cables can also create conductive EMI between modules. For conventional cables, chokes or thin absorbers can help create an economical and efficient EMI design. Solutions for flex flat cables are relatively small and can suppress EMI noise in a tight space environment - placing an EMI absorber on top is a good solution.
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Featured products:
Short cables/flex flat cables
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Sub 2.5 GHz:
3M™ Flux Field Directional Material EM25TP -
Medium noise reduction and longer shelf life:
COMING SOON: 3M™ EMI Absorber AB7000E Series -
Harsh environments:
COMING SOON: 3M™ EMI Absorber AB8000 Series -
2-7 GHz:
COMING SOON: 3M™ EMI Absorber AB3000 Series -
Roll format:
3M™ EMI Absorber AB5000HF and 3M™ EMI Absorber AB5000SHF Series
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This information is supplemental only and is not intended to replace the detailed information found in 3M technical data sheets. Actual performance is based on absorber size and placement in a specific application.
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EMI absorbing performance
Available in a range of thicknesses and performance characteristics, our EMI/RF absorbers allow you to suppress noise and protect nearby electronics, all at the targeted permeability and magnetic loss level for your target frequencies. You can minimize noise and crosstalk, increase high-frequency SNR and improve signal integrity and reliability at frequencies up to 10 GHz.
Absorber performance defined
Operating frequency range is where the imaginary part of the permeability graph exceeds ~50% of its maximum value. Target frequency range is the "sweet spot" for peak performance. This is based on frequencies in key applications (ie. LTE, Wi-Fi). EMI reduction axis is primarily based on magnetic properties of the materials (ie. permeability, permittivity).
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Magnetic shielding performance
These EMI/EMC shielding solutions provide magnetic shielding to help protect electronic devices from external low magnetic fields (<15 MHz). These materials deliver targeted permeability for efficiently shielding the magnetic fields, especially EM80KM due to the high magnetic permeability. Some of our other materials also feature excellent EMI absorbing performance from 200 MHz – 4 GHz.
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Featured product
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This versatile magnetic material helps protect sensitive electronic components and circuitry in a wide range of applications. It functions as both a magnetic shielding material and a broad frequency absorber – it allows targeted permeability for frequencies below 5-10 MHz, and is an excellent EMI EM field absorber from 200MHz - 4GHz.
Future-tested solutions
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At 3M, we’re testing our EMI absorbing and magnetic shielding solutions for the future. Our testing capabilities include:
- Simulation and modeling
- Frequency measurement
- Material magnetization
- Reliability testing for age, humidity and temperature cycling
- And more
In many cases, 3M can focus our technical and testing capabilities to help identify the right solution for you and your customers. No matter what your field, you can feel confident that the 3M solutions you specify will be tested and proven for performance. Virtually anywhere in the world. Now and in the future.
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[MUSIC PLAYING]
Video: Watch effective magnetic shielding in action
In this demonstration, you’ll see the effects of a range of materials on a spinning rotor magnet. A 0.7 mm plastic plate and 0.1 mm copper foil have no effect – the magnetic field remains unblocked and the rotor keeps spinning. Then we introduce 3M™ Flux Field Directional Materials, which provide partial and full magnetic flux shielding to slow or stop the rotor. 3M provides a range of magnetic shielding solutions, including materials that can function as both magnetic shields and absorbers.
Featured Resources
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EMI/RFI Brochure/Selection Guide
Need help?
Do you have questions or need assistance with your EMI design challenges? Send us a message. Include as much information as possible so we can respond promptly and accurately.
