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. 812-0764
Mfr. Part No.BMB2A0060LN2
SGD0.118
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. 166-9559
Mfr. Part No.BLM15HD102SN1D
BrandMurata
SGD0.046
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. 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
SGD188.33
1 Reel of 10000
Reel(s)
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. 888-3077
Mfr. Part No.HI2220P601R-10
SGD0.579
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. 164-5313
Mfr. Part No.BMB2A0300LN2
SGD305.76
1 Reel of 4000
Reel(s)
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS Stock No. 747-4720
Mfr. Part No.BLM18KG601SN1D
BrandMurata
SGD0.048
Each (In a Bag of 100)
units
0603 (1608M) - 600Ω - - - 1.3A Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band Digital Interface
RS Stock No. 144-9798
Mfr. Part No.74279202
SGD424.00
1 Reel of 4000
Reel(s)
805 - 120Ω - - - 500mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - 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. 888-3030
Mfr. Part No.HI1206T161R-10
SGD0.087
Each (In a Pack of 500)
units
1206 (3216M) 71Ω 160Ω - - 127Ω 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. 724-1277
Mfr. Part No.BLM15HD102SN1D
BrandMurata
SGD0.168
Each (In a Pack of 25)
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. 812-0767
Mfr. Part No.BMB2A0300LN2
SGD0.12
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. 787-9967
Mfr. Part No.742792118
SGD0.322
Each (In a Bag of 10)
units
1206 (3216M) - 600Ω - - - 2.5A EMI Suppression 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Suppression Components
RS Stock No. 144-9866
Mfr. Part No.742792118
SGD682.20
1 Reel of 3000
Reel(s)
1206 - 600Ω - - - 2.5A EMI Suppression 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Suppression Components
RS Stock No. 144-9858
Mfr. Part No.74279223560
SGD1,356.00
1 Reel of 2500
Reel(s)
1612 - 56Ω - - - 10A Bead 4.06 x 3.05 x 2.28mm 4.06mm 3.05mm 2.28mm - EMI Suppression, High Current
RS Stock No. 888-3083
Mfr. Part No.HI2220R151R-10
SGD0.374
Each (In a Pack of 100)
units
2220 (5650M) 60Ω 150Ω - - 196Ω 5A Chip Bead 5.59 x 5.08 x 1.8mm 5.59mm 5.08mm 1.8mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS Stock No. 888-3395
Mfr. Part No.28A3851-0A2
SGD3.53
Each (In a Pack of 10)
units
3851 150Ω 260Ω 410Ω - - - Snap-On EMI Core, Split EMI Core 30 x 33.7 x 30mm 30mm 33.7mm 30mm - EMI Suppression
RS Stock No. 724-1609
Mfr. Part No.BL01RN1A2A2B
BrandMurata
SGD0.179
Each (In a Pack of 25)
units
Axial - - - - - 7A EMI Suppression 3.6 (Dia.) x 5mm 5mm - 5mm 3.6mm -
RS Stock No. 683-5247
Mfr. Part No.WBC2.5/A-4B1
BrandFERROXCUBE
SGD0.871
Each (In a Pack of 10)
units
Axial - - - - - - Bead 6 (Dia.) x 10mm - - 10mm 6mm EMI Suppression, RFI Suppression
RS Stock No. 124-1521
Mfr. Part No.74275043
SGD0.384
Each (In a Pack of 20)
units
Radial 920Ω 961Ω - - - 3A Ferrite Bead 6 (Dia.) x 10mm 10mm - 10mm 6mm General Electronics
RS Stock No. 166-9826
Mfr. Part No.BLM31PG121SN1L
BrandMurata
SGD0.131
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
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