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Permalloy shields for SMD (Surface Mount Device) components are high-permeability, nickel-iron alloy covers designed to attenuate low-frequency magnetic interference (EMI) at the board level. These shields, often utilizing materials like 1J79 or 1J85 (similar to MuMetal), are crucial for protecting sensitive sensors, magnetic sensors, and amplifiers in compact electronic assemblies.
Key Features & Materials
- High Permeability: Materials such as 1J79 NiFe provide excellent attenuation of magnetic fields.
- Form Factors: Available as stamped shielding covers, cases, or foils for covering specific magnetic components.
- Types of Shields: Custom shapes and standard square or round NiFe-based Mu Metal shielding covers are commonly used, particularly with surface mount soldering techniques.
- Performance: Effective for shielding static or slowly varying magnetic fields that standard aluminum or copper cannot block.
Common Applications
- SMD PCB Components: Protecting sensitive ICs and sensors from EMI.
- Audio/RF Devices: Utilizing materials like Ultraperm 80 for reducing interference in sensitive equipment.
- Sensors & Transformers: Employing 1J85 Permalloy to shield components from magnetic flux in transformers and relays.
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Popular products
- Customized Size 1J85 Permalloy High-Permeability Magnetic Field Shielding Tape Soft Magnetic AlloyAliExpress
Customized Size 1J85 Permalloy High-Permeability Magnetic Field Shielding Tape Soft Magnetic AlloyAliExpress - Leader Tech Inc. SMS-255F RF SHIELD 0.75" X 0.75" SMDDigiKeyLeader Tech Inc. SMS-255F RF SHIELD 0.75" X 0.75" SMDDigiKey
- 40% OFFPermalloy Magnetic Shielding Material PC 80 Iron Nickel Alloy Zero Cut EMI Shielding For Electromagnetic Interference Protection D5mm By L200mm Must HVXB.com BearingsFree delivery40% OFFPermalloy Magnetic Shielding Material PC 80 Iron Nickel Alloy Zero Cut EMI Shielding For Electromagnetic Interference Protection D5mm By L200mm Must HVXB.com BearingsFree delivery
- Permalloy steel sheet 10k:10k 600:600 10K:600 :10K Audio Isolator Amplified cattle balanced AudioAliExpressPermalloy steel sheet 10k:10k 600:600 10K:600 :10K Audio Isolator Amplified cattle balanced AudioAliExpress
Web results
High Quality Products Factory, Exporter | Ironcore
permalloy.com
https://www.permalloy.com › products
permalloy.com
https://www.permalloy.com › products
Products · Mu-metal Shield for SMD. Stamped core-1 · 1J79 NiFe basedPermalloy Shielding. Square shielding cover · NiFe Based Mu MetalShielding Cup. Round shield.Read more
1J79 NiFe Based Permalloy Shielding Cover Suppliers, ...
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › 1j79-nife-based-permall...
Jiangsu Hongyun Precision Industry Co., Ltd.
https://www.hongertech.com › 1j79-nife-based-permall...
Permalloy Shielding covers are produced from high permeability nickel iron alloy (or Mu Metal) and provide excellent low frequency magnetic field attenuation ...Read more
TDK introduces new ultra-thin, lightweight permalloy film ...
TDK Corporation
https://www.tdk.com › ... › News Center › Press Releases
TDK Corporation
https://www.tdk.com › ... › News Center › Press Releases
May 16, 2024 — This new material effectively shields low-frequency band noise, which is becoming a growing issue in electric vehicles (EVs).Read more
Microstructure evolution and magnetic shielding effect of ...
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
ScienceDirect.com
https://www.sciencedirect.com › article › abs › pii
by Q Yin2022Cited by 19 — For small devices like spiral inductors, the thin permalloy coating on device surface is feasible to achieve magnetic shielding effect [18]. For large ...Read more
Magnetic Shielding Permalloy Foil
이송이엠씨
https://esongemc.com › eng › permalloy-foil
이송이엠씨
https://esongemc.com › eng › permalloy-foil
Cover the magnetic field parts with permalloy foil, or protect the sensor from external magnetic fields by inserting the sensor control in the permalloy case.Read more
· Review by Brad Song
1J85 Permalloy Magnetic Shielding Material PC-80 Iron ...
Amazon.com
https://www.amazon.com › ...
Amazon.com
https://www.amazon.com › ...
1J85 Permalloy Magnetic Shielding Material PC-80 Iron-Nickel Alloy Zero-Cut electromagnetic Field Interference Protection(D5mmxL200mm).Read more
Permalloy Foil with Magnetic Noise Suppression effect at ...
MPCO Magnets
https://mpcomagnetics.com › blog › permalloy-foil-with-...
MPCO Magnets
https://mpcomagnetics.com › blog › permalloy-foil-with-...
May 6, 2023 — These are shielding materials with a thickness less than 30μm, and are effective in suppressing noise in the middle frequency band, mainly up to ...Read more
electromagnetism - One-way magnetic shielding?
Physics Stack Exchange
https://physics.stackexchange.com › questions › one-wa...
Physics Stack Exchange
https://physics.stackexchange.com › questions › one-wa...
Jul 10, 2021 — Is there such a thing as a material that allows magnetic/electric fields to pass one way but not the other? An analogous example would be a one-way mirror ...
2 answers · Top answer: In 2018, a team of researchers did in fact design a material that acts as a "magnetic diode", ...
Permalloy | Soft Magnetic Alloy | NGYC
magnet-materials.com
http://magnet-materials.com › 2-3-soft-magnetic-iron-nic...
magnet-materials.com
http://magnet-materials.com › 2-3-soft-magnetic-iron-nic...
High magnetic permeability, low losses, and low magnetostriction. · Superior processability with excellent surface quality and exceptional welding properties.Read more
MuMetal Mu Metal Permalloy Alloy Shielding Sheet
eBay
https://www.ebay.com › itm
eBay
https://www.ebay.com › itm
Ultraperm 80 shielding sheet commonly used to reduce EMI (interference) in all sorts of DIY projects. Very popular for RF and audio applications.