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. 166-9827
Mfr. Part No.BLM31PG601SN1L
BrandMurata
MYR0.381
Each (On a Reel of 3000)
units
1206 (3216M) - 600Ω - - - 1.5A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - 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. 167-3811
Mfr. Part No.BLM15EG121SN1D
BrandMurata
MYR0.258
Each (On a Reel of 10000)
units
0402 (1005M) - 120Ω - - - 1.5A Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS Stock No. 724-1504
Mfr. Part No.BLM21BB221SN1D
BrandMurata
MYR0.345
Each (In a Pack of 25)
units
0805 (2012M) - 220Ω - - - 500mA 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. 724-1264
Mfr. Part No.BLM15AG221SN1D
BrandMurata
MYR0.262
Each (In a Pack of 25)
units
0402 (1005M) - 220Ω - - - 450mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, General Use
RS Stock No. 163-3996
Mfr. Part No.74279224101
MYR3.833
Each (On a Reel of 2000)
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. 125-3156
Mfr. Part No.BLM31PG330SN1L
BrandMurata
MYR0.429
Each (On a Reel of 3000)
units
1206 (3216M) - 33Ω - - - 6A Chip Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - 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. 888-3355
Mfr. Part No.28A2025-0A2
MYR4.778
Each (In a Pack of 50)
units
2025 130Ω 320Ω 510Ω - - - Snap-On EMI Core, Split EMI Core 18.15 x 32.5 x 18.9mm 18.15mm 32.5mm 18.9mm - EMI Suppression
RS Stock No. 863-7313
Mfr. Part No.4-1624116-8
MYR0.49
Each (In a Bag of 100)
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. 167-4203
Mfr. Part No.BLM18HE102SN1D
BrandMurata
MYR0.228
Each (On a Reel of 4000)
units
0603 (1608M) - 1000Ω - - - 600mA 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. 792-6221
Mfr. Part No.BLM18AG151SN1D
BrandMurata
MYR0.272
Each (In a Bag of 25)
units
0603 (1608M) - 150Ω - - - 700mA 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. 358-6563
Mfr. Part No.74275022
MYR1.61
Each
units
Axial - - - - - - Bead 6 (Dia.) x 10mm 10mm - - 6mm General Electronics
RS Stock No. 125-3150
Mfr. Part No.BLM18PG471SN1D
BrandMurata
MYR0.085
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. 888-3238
Mfr. Part No.MI0603K300R-10
MYR0.162
Each (In a Pack of 40000)
units
0603 (1608M) 12Ω 30Ω - - 45Ω 1.5A Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
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 - -
RS Stock No. 888-3339
Mfr. Part No.28A0593-0A2
MYR7.445
Each (In a Pack of 50)
units
0593 186Ω 407Ω 575Ω - - - Snap-On EMI Core, Split EMI Core 18.75 x 52.91mm 52.91mm - - 18.75mm EMI Suppression
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. 792-6259
Mfr. Part No.BLM18HE152SN1D
BrandMurata
MYR0.456
Each (In a Bag of 25)
units
0603 (1608M) - 1500Ω - - - 500mA 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. 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