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

DVDs

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. 124-1844
Mfr. Part No.742792662
SGD0.232
Each (In a Pack of 100)
units
0603 (1608M) - 1000Ω - - - 600mA 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. 724-1425
Mfr. Part No.BLM18PG471SN1D
BrandMurata
SGD0.074
Each (In a Pack of 25)
units
0603 (1608M) - 470Ω - - - 1A Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, Power Supplies
RS Stock No. 125-3150
Mfr. Part No.BLM18PG471SN1D
BrandMurata
SGD0.031
Each (On a Reel of 4000)
units
0603 (1608M) - 470Ω - - - 1A Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression, Power Supplies
RS Stock No. 888-3373
Mfr. Part No.28A2432-0A2
SGD2.054
Each (In a Pack of 50)
units
2432 62Ω 160Ω 300Ω - - - Snap-On EMI Core, Split EMI Core 19.2 x 19.9mm 19.9mm - - 19.2mm EMI Suppression
RS Stock No. 163-3212
Mfr. Part No.742730023
SGD4.224
Each (In a Tube of 40)
units
Radial - 338Ω - - - - Multi Line 11 x 11.2 x 11.2mm 11.2mm 11.2mm 11mm - EMI Suppression, General Electronics
RS Stock No. 358-6591
Mfr. Part No.742730023
SGD4.66
Each
units
Radial - 338Ω - - - - Multi Line 11 x 11.2 x 11.2mm 11.2mm 11.2mm 11mm - EMI Suppression, General Electronics
RS Stock No. 230-3907
Mfr. Part No.BLM31AF700SN1L
BrandMurata
SGD0.183
Each (In a Pack of 20)
units
1206 (3216M) - - - - - - Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - -
RS Stock No. 888-3257
Mfr. Part No.MI0805K400R-10
SGD0.103
Each (In a Pack of 500)
units
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 Stock No. 161-8080
Mfr. Part No.BLM31AF700SN1L
BrandMurata
SGD250.95
1 Reel of 2500
Reel(s)
1206 (3216M) - - - - - - Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - -
RS Stock No. 166-9559
Mfr. Part No.BLM15HD102SN1D
BrandMurata
SGD0.073
Each (On a Reel of 10000)
units
0402 (1005M) - 1000Ω - - - 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. 812-0764
Mfr. Part No.BMB2A0060LN2
SGD0.134
Each (In a Bag of 100)
units
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS Stock No. 144-9814
Mfr. Part No.74279204
SGD0.232
Each (On a Reel of 4000)
units
0805 - - - - - - - 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm - General Electronics
RS Stock No. 604-2224
Mfr. Part No.MPZ2012S300AT
BrandTDK
SGD0.149
Each (In a Pack of 10)
units
0805 - - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Power Line
RS Stock No. 260-6874
Mfr. Part No.74279204
SGD0.295
Each (In a Pack of 10)
units
0805 (2012M) - - - - - - - 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm - General Electronics
RS Stock No. 146-0716
Mfr. Part No.7427927218
SGD0.253
Each (In a Pack of 50)
units
0402 (1005M) - 180Ω - 260Ω - 400mA Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Data Line Filter, Uncoupling of Distribution Voltage
RS Stock No. 888-3077
Mfr. Part No.HI2220P601R-10
SGD0.796
Each (In a Pack of 50)
units
2220 (5650M) 220Ω 600Ω - - 106Ω 4A Chip Bead 5.59 x 5.08 x 3.05mm 5.59mm 5.08mm 3.05mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS Stock No. 161-6309
Mfr. Part No.BMB2A0060LN2
SGD0.07
Each (On a Reel of 4000)
units
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS Stock No. 144-9750
Mfr. Part No.7427927218
SGD0.198
Each (On a Reel of 10000)
units
0402 (1005M) - 180Ω - 260Ω - 400mA Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Data Line Filter, Uncoupling of Distribution Voltage
RS Stock No. 839-0796
Mfr. Part No.BLM15PD300SN1D
BrandMurata
SGD0.025
Each (In a Bag of 100)
units
0402 (1005M) - 30Ω - - - 2.2A Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, Power Supplies
RS Stock No. 167-4833
Mfr. Part No.BLM15PD300SN1D
BrandMurata
SGD0.034
Each (On a Reel of 10000)
units
0402 (1005M) - 30Ω - - - 2.2A Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, Power Supplies
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