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. 124-1520
Mfr. Part No.74275013
MYR1.869
Each (In a Pack of 20)
units
Axial 750Ω 950Ω - - - 3A Ferrite Bead 6 (Dia.) x 10mm - - 10mm 6mm Digital Devices, PCB, Radio Frequency Interferences, Text Processing
RS Stock No. 888-3474
Mfr. Part No.28B0686-200
MYR2.625
Each (In a Pack of 50)
units
0686 124Ω 242Ω 390Ω - - - Cylindrical EMI Core 17.42 x 28.58mm 28.58mm - - 17.42mm EMI Suppression
RS Stock No. 724-1270
Mfr. Part No.BLM15BD601SN1D
BrandMurata
MYR0.219
Each (In a Pack of 25)
units
0402 (1005M) - 600Ω - - - 200mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, High Speed Signal Lines
RS Stock No. 724-1346
Mfr. Part No.BLM18HD102SN1D
BrandMurata
MYR0.446
Each (In a Pack of 25)
units
0603 (1608M) - 1000Ω - - - 50mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band High-Speed Signal Line
RS Stock No. 124-1869
Mfr. Part No.74279218
MYR0.959
Each (In a Pack of 50)
units
1206 (3216M) - 600Ω - - - 2A 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. 124-1873
Mfr. Part No.742792410
MYR1.071
Each (In a Pack of 50)
units
1806 (4516M) - 60Ω - - 120Ω 6A Ferrite Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - 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. 144-9808
Mfr. Part No.742792410
MYR0.821
Each (On a Reel of 2000)
units
1806 - 60Ω - - 120Ω 6A Ferrite Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - 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. 888-3336
Mfr. Part No.28A0592-0A2
MYR6.699
Each (In a Pack of 50)
units
0592 232Ω 511Ω 627Ω - - - Snap-On EMI Core, Split EMI Core 18.75 x 53.39mm 53.39mm - - 18.75mm EMI Suppression
RS Stock No. 741-3191
Mfr. Part No.MPZ2012S331AT
BrandTDK
MYR0.241
Each (In a Bag of 100)
units
0805 (2012M) - - - - - - - 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - -
RS Stock No. 724-1299
Mfr. Part No.BLM18AG601SN1D
BrandMurata
MYR0.272
Each (In a Pack of 25)
units
0603 (1608M) - 600Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, General Use
RS Stock No. 724-1523
Mfr. Part No.BLM21BD222TN1D
BrandMurata
MYR0.456
Each (In a Pack of 25)
units
0805 (2012M) - 2200Ω - - - 200mA Chip Ferrite Bead 2 x 1.25 x 1.25mm 2mm 1.25mm 1.25mm - EMI Suppression Filter, High Speed Signal Lines
RS Stock No. 166-9826
Mfr. Part No.BLM31PG121SN1L
BrandMurata
MYR0.381
Each (On a Reel of 3000)
units
1206 (3216M) - 120Ω - - - 3.5A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - EMI Suppression, Power Supplies
RS Stock No. 167-4984
Mfr. Part No.BLM21PG121SN1D
BrandMurata
MYR0.123
Each (On a Reel of 4000)
units
0805 (2012M) - 120Ω - - - 3mA Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS Stock No. 749-8299
Mfr. Part No.74279224101
MYR4.46
Each (In a Bag of 5)
units
2220 (5650M) - 100Ω - - - 7A Bead 5.59 x 5.08 x 1.8mm 5.59mm 5.08mm 1.8mm - EMI Suppression, High Current
RS Stock No. 792-6300
Mfr. Part No.BLM21PG121SN1D
BrandMurata
MYR0.262
Each (In a Bag of 25)
units
0805 (2012M) - 120Ω - - - 3mA Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS Stock No. 164-5832
Mfr. Part No.4-1624116-8
MYR0.293
Each (On a Reel of 4000)
units
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS Stock No. 888-3024
Mfr. Part No.HI1206N101R-10
MYR0.324
Each (In a Pack of 500)
units
1206 (3216M) 41Ω 100Ω - - 145Ω 3A 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. 741-3194
Mfr. Part No.MPZ1608S221AT
BrandTDK
MYR0.187
Each (In a Bag of 100)
units
0603 (1608M) - - - - - - - 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS Stock No. 167-4911
Mfr. Part No.BLM15GA750SN1D
BrandMurata
MYR0.562
Each (On a Reel of 10000)
units
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
RS Stock No. 109-4151
Mfr. Part No.MPZ1608S221AT
BrandTDK
MYR0.152
Each (On a Reel of 4000)
units
0603 (1608M) - - - - - - - 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -