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 500 MHz Impedance at 1 GHz Current Rating Type Dimensions Length Depth Height Diameter Application Material
RS Stock No. 863-7152
Mfr. Part No.3-1624116-7
$0.177
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 - General Purpose, High frequency Ferrite
RS Stock No. 812-0777
Mfr. Part No.BMB2A0120AN4
$0.072
Each (In a Bag of 100)
units
0805 (2012M) - 120Ω - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - EMI Filtering, General Electronics Ferrite
RS Stock No. 161-6309
Mfr. Part No.BMB2A0060LN2
$0.068
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 Ferrite
RS Stock No. 812-0764
Mfr. Part No.BMB2A0060LN2
$0.107
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 Ferrite
RS Stock No. 164-5798
Mfr. Part No.3-1624116-7
$0.103
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 - - Ferrite
RS Stock No. 162-1665
Mfr. Part No.BMB2A0120AN4
$0.049
Each (On a Reel of 4000)
units
0805 (2012M) - 120Ω - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - EMI Filtering, General Electronics Ferrite
RS Stock No. 164-5700
Mfr. Part No.1879855-7
$0.105
Each (On a Reel of 10000)
units
0402 (1005M) - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - - Ferrite
RS Stock No. 164-5863
Mfr. Part No.5-1624116-3
$0.103
Each (On a Reel of 4000)
units
0603 (1608M) - 220Ω - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering Ferrite
RS Stock No. 164-5701
Mfr. Part No.1879855-8
$0.105
Each (On a Reel of 10000)
units
0402 (1005M) - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - - Ferrite
RS Stock No. 863-7354
Mfr. Part No.6-1624117-3
$0.174
Each (In a Bag of 100)
units
0805 (2012M) - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Current, Noise Filtering Ferrite
RS Stock No. 164-5315
Mfr. Part No.BMB2A0600BN3
$0.08
Each (On a Reel of 4000)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Frequency -
RS Stock No. 863-7385
Mfr. Part No.5-1624116-8
$0.177
Each (In a Bag of 100)
units
0603 (1608M) - 30Ω - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering Ferrite
RS Stock No. 812-0795
Mfr. Part No.BMB2A0120BN3
$0.152
Each (In a Bag of 100)
units
0805 (2012M) - 120Ω - - - Chip Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Frequency -
RS Stock No. 863-7098
Mfr. Part No.1879855-2
$0.155
Each (In a Bag of 100)
units
0402 (1005M) - 30Ω - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency Ferrite
RS Stock No. 863-7293
Mfr. Part No.5-1624117-7
$0.26
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 Ferrite
RS Stock No. 164-5792
Mfr. Part No.3-1624116-1
$0.103
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 - - Ferrite
RS Stock No. 863-7357
Mfr. Part No.6-1624117-1
$0.174
Each (In a Bag of 100)
units
0805 (2012M) - 60Ω - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Current, Noise Filtering Ferrite
RS Stock No. 164-5841
Mfr. Part No.4-1624117-5
$0.063
Each (On a Reel of 4000)
units
0805 (2012M) - 2000Ω - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - - Ferrite
RS Stock No. 164-5865
Mfr. Part No.5-1624116-5
$0.103
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 Ferrite
RS Stock No. 863-7212
Mfr. Part No.4-1624117-5
$0.09
Each (In a Bag of 100)
units
0805 (2012M) - 2000Ω - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency Ferrite