Ferrite Beads

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Ferrite Beads also known as ferrite chokes are passive devices and they are used to constrict high-frequency signals in electronic components. The ferrite becomes resistive over its intended frequency range and uses up the noise energy in the form of heat.


How do the ferrite beads work?


The ferrite bead is connected in series with the power supply rail and is often combined with the capacitors to ground on either side of the bead. This then forms a low-pass filter network, further reducing the high-frequency power supply noise. Use SPICE (Simulation Program with Integrated Circuit Emphasis) or another similar tool to ensure any anti-resonance peaks caused by ferrite or PCB inductive structure does not violate the target impedance limit.


Ferrite Beads come in two categories:


High-Q Beads - typically used as resonators and must not be used in power isolation circuits


Low-Q Beads - these are also called absorptive beads and they are lossy and make good filter networks because they are designed to absorb high-frequency noise currents and dissipate it as heat


What to consider when choosing Ferrite Beads?


Make sure that any voltage drop does not cause the target supply rail to fall below the recommended operating conditions of the device


The ferrite bead is inductive, therefore do not use it with High-Q decoupling capacitors


Applying ferrite beads correctly can be an effective and inexpensive way to reduce high-frequency noise and switching transients


Where are Ferrite Beads used?


Eliminating high-frequency EMI noise on any circuit design


Electronic devices such as mobile phones


Computers and laptops


TV tuners


Audio Players


DVD’s


Gaming Systems

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RS庫存編號 669-3970
製造零件編號74279272
TWD6.10
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0402 (1005M) - 300Ω - - - 200mA EMI Suppression 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Suppression Components
RS庫存編號 144-9857
製造零件編號7427521
TWD61.00
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- - 52Ω - - - 5A Bead 8.9 x 5.6 x 2.5mm 8.9mm 5.6mm 2.5mm - Common Mode Interference, General Electronics, Power Supply, Symmetric Data Lines
RS庫存編號 724-1289
製造零件編號BLM15HG601SN1D
BrandMurata
TWD3.40
/個 (每包:25個)
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0402 (1005M) - 600Ω - - - 300mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, GHz Band General Use
RS庫存編號 792-6209
製造零件編號BLM15BD102SN1D
BrandMurata
TWD1.70
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0402 (1005M) - 1000Ω - - - 200mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, High Speed Signal Lines
RS庫存編號 863-7215
製造零件編號4-1624117-6
TWD2.50
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0805 (2012M) - 2700Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS庫存編號 786-5065
製造零件編號MMZ2012Y102BT
BrandTDK
TWD1.40
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0805 (2012M) - - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
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BrandMurata
TWD5,724.00
毎卷:2500 個
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1206 (3216M) - - - - - - Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - -
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製造零件編號74279224271
TWD29.70
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2220 (5650M) - 270Ω - - - 4A Bead 5.59 x 5.08 x 3.2mm 5.59mm 5.08mm 3.2mm - EMI Suppression, High Current
RS庫存編號 888-3437
製造零件編號28B0375-100
TWD4.30
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0375 74Ω 154Ω 282Ω - - - Cylindrical EMI Core 9.53 x 14.48mm 14.48mm - - 9.53mm EMI Suppression
RS庫存編號 863-7130
製造零件編號3-1624116-1
TWD3.90
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0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS庫存編號 870-9291
製造零件編號Z0402C100ASMST
BrandKEMET
TWD1.30
/個 (每包:10000個)
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0402 (1005M) - 10Ω - - - 1A Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS庫存編號 109-4152
製造零件編號MMZ1608S601AT
BrandTDK
TWD0.70
個 (在毎卷:4000)
單位
0603 (1608M) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
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TWD1.80
/個 (每包:500個)
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0805 (2012M) 19Ω 40Ω - - 63Ω 1.5A Chip Bead 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS庫存編號 888-3415
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BrandFair-Rite
TWD3.80
/個 (每包:25個)
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製造零件編號Z0402C121ASMST
BrandKEMET
TWD0.90
/個 (每包:10000個)
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0402 (1005M) - 120Ω - - - 500mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS庫存編號 792-6205
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BrandMurata
TWD1.90
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0402 (1005M) - 75Ω - - - 300mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, High Speed Signal Lines
RS庫存編號 167-4911
製造零件編號BLM15GA750SN1D
BrandMurata
TWD4.70
個 (在毎卷:10000)
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0402 (1005M) - 75Ω - - - 200mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, High-GHz Band High-speed signal lines
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TWD10.20
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0805 (2012M) - 600Ω - - - 2.1A Ferrite Bead 2 x 1.2 x 0.9mm 2mm 0.9mm 1.2mm - DC/DC Converter, High Current, Power Supply
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BrandMurata
TWD1.90
個 (在毎卷:3000)
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