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Flexible Ferrites

Fair-Rite Products offers NiZn flexible ferrite in six initial permeabilities. Useful in the mitigation of radiated emissions, flexible ferrite sheets are available in thicknesses ranging from 0.1mm to 0.5mm . Two standard sizes are available, 60mm x 60mm, and 120mm x 120mm, custom shapes available as die-cut. All flexible ferrite sheets come with an adhesive PET backing useful for surface application. Shielding effectiveness (SE) will increase with material thickness and permeability. Secondary uses of flexible ferrite include its ability to direct the magnetic field in wireless charging applications. Placement of a flexible ferrite sheet between the antenna and a conductive metallic surface will reduce eddy currents and losses thereby increase power transfer efficiency. The M6 material will supply the most attenuation below 50 MHz. The M4 type grade has been effectively used for A4WP (6.78 MHz) and NFC/RFID (13.56 MHz); the advantage with the M4 materials is lower loss (µ'') - thus reducing detuning of the antenna. The M3, M2 and M1 material grades build on this lower loss advantage at higher frequency where reactive permeability (µ') is desired but the resistive component of the permeability (µ'') is not.

Dimensions: Top numbers are in millimeters,
bottom numbers are in nominal inches.
Part Number Material GradeSheet SizeFerrite ThicknessTotal Thickness µ' at 1MHzTypical Shielding Effectiveness dB ***Feature
1MHz6.78MHz13.56MHz100MHz300MHz
38M1010AA1212
38M1020AA1212
38M1040AA0606
38M1050AA0606
38M2010AA1212
38M2020AA1212
38M2040AA0606
38M2050AA0606
38M3010AA1212
38M3020AA1212
38M3040AA0606
38M3050AA0606
38M4010AA1212
38M4020AA1212
38M4040AA0606
38M4050AA0606
38M5010AA1212
38M5020AA1212
38M5040AA0606
38M5050AA0606
38M6010AA1212
38M6020AA1212
38M6040AA0606
38M6050AA0606
Part Number Material GradeSheet SizeFerrite ThicknessTotal Thickness µ' at 1MHzTypical Shielding Effectiveness dB ***Feature
1MHz6.78MHz13.56MHz100MHz300MHz
38M1010AA1212 M1120 x 120 mm0.1 mm0.13 mm201.61.61.61.71.5Effective shielding, yet low loss above 200 MHz
38M1020AA1212 M1120 x 120 mm0.2 mm0.23 mm203.63.63.643.3Effective shielding, yet low loss above 200 MHz
38M1040AA0606 M160 x 60 mm0.4 mm0.43 mm204.74.74.75.15Effective shielding, yet low loss above 200 MHz
38M1050AA0606 M160 x 60 mm0.5 mm0.53 mm205.65.65.66.16Effective shielding, yet low loss above 200 MHz
38M2010AA1212 M2120 x 120 mm0.1 mm0.13 mm452222.41.6Effective shielding, yet low loss at 50-200 MHz
38M2020AA1212 M2120 x 120 mm0.2 mm0.23 mm454.24.24.253.3Effective shielding, yet low loss at 50-200 MHz
38M2040AA0606 M260 x 60 mm0.4 mm0.43 mm456.66.66.67.75.6Effective shielding, yet low loss at 50-200 MHz
38M2050AA0606 M260 x 60 mm0.5 mm0.53 mm458889.36.6Effective shielding, yet low loss at 50-200 MHz
38M3010AA1212 M3120 x 120 mm0.1 mm0.13 mm603333.11.5Effective shielding, yet low loss at 15 - 50 MHz
38M3020AA1212 M3120 x 120 mm0.2 mm0.23 mm605555.63.1Effective shielding, yet low loss at 15 - 50 MHz
38M3040AA0606 M360 x 60 mm0.4 mm0.43 mm608.28.28.29.16Effective shielding, yet low loss at 15 - 50 MHz
38M3050AA0606 M360 x 60 mm0.5 mm0.53 mm609999.36.1Effective shielding, yet low loss at 15 - 50 MHz
38M4010AA1212 M4120 x 120 mm0.1 mm0.13 mm1205.86.16.141.8Optimal μ` and μ`` for NFC and A4WP
38M4020AA1212 M4120 x 120 mm0.2 mm0.23 mm1209.58.696.63.1Optimal μ` and μ`` for NFC and A4WP
38M4040AA0606 M460 x 60 mm0.4 mm0.43 mm1201211.311.79.35.6Optimal μ` and μ`` for NFC and A4WP
38M4050AA0606 M460 x 60 mm0.5 mm0.53 mm12013.514.214.510.66.5Optimal μ` and μ`` for NFC and A4WP
38M5010AA1212 M5120 x 120 mm0.1 mm0.13 mm140109.283.61.5Best Temperature Coefficient for NFC and A4WP
38M5020AA1212 M5120 x 120 mm0.2 mm0.23 mm1401111.29.95.12.5Best Temperature Coefficient for NFC and A4WP
38M5040AA0606 M560 x 60 mm0.4 mm0.43 mm14014.51412.47.34Best Temperature Coefficient for NFC and A4WP
38M5050AA0606 M560 x 60 mm0.5 mm0.53 mm14015.514.8148.75.1Best Temperature Coefficient for NFC and A4WP
38M6010AA1212 M6120 x 120 mm0.1 mm0.13 mm2201010.28.94.41.9Provides maximal attenuation up to 50 MHz
38M6020AA1212 M6120 x 120 mm0.2 mm0.23 mm22013.213.211.76.42.9Provides maximal attenuation up to 50 MHz
38M6040AA0606 M660 x 60 mm0.4 mm0.43 mm220161614.48.85Provides maximal attenuation up to 50 MHz
38M6050AA0606 M660 x 60 mm0.5 mm0.53 mm22018.51917.5116.8Provides maximal attenuation up to 50 MHz

Total Thickness = Ferrite Thickness + 0.01mm PET layer + 0.02mm Adhesive Tape layer. Sheets are supplied with backing/release paper on the adhesive side.
*** Shielding effectiveness measured per IEC 62332-2 Rrs method on an E5072A Vector Network Analyzer utilizing the VNA's smoothing capabilities.



Applications:
– Wireless Power Charging Station
– RFID and NFC antennas
– PCB and IC components
– Switch-mode power supplies
Key Benefits:
– Can be quickly implemented into custom designs
– Easier to handle in production versus rigid plates
– High surface resistivity
– Can be cut with a knife, razor or scissors Die cutting is available
– Easy to apply – peel and stick
The recommended operating temperature is -40º to +85ºC and the typical thermal conductivity is  6 watt / m-ºC.  
Storage Temperature : -40º to +85ºC, suggested shelf life is one year;
however shelf life may be extended by storage at 22 – 25ºC and 45-55% RH avoiding light and dust.

Used primarily for suppressive applications, the amount of noise that is absorbed at higher frequencies
is proportional to the resistive component of the permeability (μ’’) and the thickness of the ferrite.
The operational frequencies can range from below 1 MHz into the GHz range, making it ideal for a multitude of applications.


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