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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Description Price Package Type Impedance at 25 MHz Impedance at 100 MHz Impedance at 300 MHz Impedance at 500 MHz Impedance at 1 GHz Current Rating Type Dimensions Length Depth Height Diameter Application
RS Stock No. 863-7293
Mfr. Part No.5-1624117-7
MYR0.719
Each (In a Bag of 100)
units
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS Stock No. 144-9785
Mfr. Part No.742792651
MYR0.587
Each (On a Reel of 4000)
units
603 - 600Ω - - - 1A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Anti EMI, Control Signals, DC/DC Converter, Fast Bus Signals, HDD, High Current, High Frequency, High Speed, Line Filter, LVDS, Power Supply, RS232, RS422, USB 2.0
RS Stock No. 144-9789
Mfr. Part No.742792141
MYR0.663
Each (On a Reel of 3000)
units
1206 - 1000Ω - - - 1A Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Anti EMI, Control Signals, DC/DC Converter, Fast Bus Signals, HDD, High Current, High Frequency, High Speed, Line Filter, LVDS, Power Supply, RS232, RS422, USB 2.0
RS Stock No. 144-9845
Mfr. Part No.742792031
MYR0.736
Each (On a Reel of 4000)
units
0805 - 300Ω - - - 3A EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS Stock No. 144-9835
Mfr. Part No.74279271
MYR0.537
Each (On a Reel of 10000)
units
0402 - 120Ω - - - 350mA EMI Suppression 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Suppression Components
RS Stock No. 724-1378
Mfr. Part No.BLM18HG601SN1D
BrandMurata
MYR0.417
Each (In a Pack of 25)
units
0603 (1608M) - 600Ω - - - 200mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band General Use
RS Stock No. 358-6822
Mfr. Part No.742792041
MYR0.818
Each (In a Pack of 10)
units
0805 (2012M) - 600Ω - - - 200mA - 2 x 1.2 x 0.9mm 2mm 1.24mm 0.9mm - General Electronics
RS Stock No. 164-5696
Mfr. Part No.1879855-4
MYR0.288
Each (On a Reel of 10000)
units
0402 (1005M) - 120Ω - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS Stock No. 164-5700
Mfr. Part No.1879855-7
MYR0.29
Each (On a Reel of 10000)
units
0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS Stock No. 839-0758
Mfr. Part No.BLA2ABD601SN4D
BrandMurata
MYR1.10
Each (In a Bag of 10)
units
0804 (2010M) - 600Ω - - - 100mA Chip Ferrite Bead 2 x 1 x 0.5mm 2mm 1mm 0.5mm - EMI Suppression Filter, High Speed Signal Lines
RS Stock No. 172-9955
Mfr. Part No.2743003112
BrandFair-Rite
MYR0.564
Each (On a Reel of 4500)
units
Axial 65Ω 100Ω - - - - Bead 3.5 (Dia.) x 6.7mm 6.7mm - - 3.5mm EMI Suppression
RS Stock No. 172-9984
Mfr. Part No.2944777741
BrandFair-Rite
MYR3.152
Each (In a Box of 79)
units
Axial - 500Ω - - - - Bead 10 (Dia.) x 10mm 10.25mm - - 10.25mm EMI Suppression
RS Stock No. 110-100
Mfr. Part No.BLM15HB221SN1D
BrandMurata
MYR0.439
Each (In a Bag of 25)
units
0402 (1005M) - 22Ω - - - 250mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, GHz Band High-speed Signal Lines
RS Stock No. 888-3049
Mfr. Part No.HI1206T500R-10
MYR0.127
Each (In a Pack of 1000)
units
1206 (3216M) 19Ω 50Ω - - 70Ω 6A Chip Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS Stock No. 163-7379
Mfr. Part No.74279220321
MYR0.859
Each (On a Reel of 4000)
units
0805 (2012M) - 320Ω - - - 2.5A Ferrite Bead 2 x 1.2 x 0.9mm 2mm 0.9mm 1.2mm - DC/DC Converter, High Current, Power Supply
RS Stock No. 792-6246
Mfr. Part No.BLM18EG101TN1D
BrandMurata
MYR0.547
Each (In a Bag of 25)
units
0603 (1608M) - 100Ω - - - 2A Chip Ferrite Bead 1.6 x 0.8 x 0.5mm 1.6mm 0.8mm 0.5mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS Stock No. 230-3834
Mfr. Part No.BLM21BD102SN1D
BrandMurata
MYR0.386
Each (In a Pack of 20)
units
0805 (2012M) - 1000Ω - - - 250mA Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, High Speed Signal Lines
RS Stock No. 792-6252
Mfr. Part No.BLM18EG471SN1D
BrandMurata
MYR0.511
Each (In a Bag of 25)
units
0603 (1608M) - 470Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS Stock No. 144-9864
Mfr. Part No.7427920415
MYR0.629
Each (On a Reel of 4000)
units
0805 - 600Ω - - - 500mA EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS Stock No. 786-5037
Mfr. Part No.MMZ1608Y152BT
BrandTDK
MYR0.13
Each (In a Bag of 100)
units
0603 (1608M) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line