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. 109-4157
Mfr. Part No.MMZ2012Y152BT
BrandTDK
$0.05
Each (On a Reel of 4000)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line Y
RS Stock No. 604-2022
Mfr. Part No.MMZ2012Y152BT
BrandTDK
$0.127
Each (In a Pack of 10)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line Ferrite
RS Stock No. 786-5069
Mfr. Part No.MMZ2012Y152BT
BrandTDK
$0.063
Each (In a Bag of 100)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line Y
RS Stock No. 741-3131
Mfr. Part No.MMZ1608R301AT
BrandTDK
$0.051
Each (In a Bag of 100)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line R
RS Stock No. 741-3191
Mfr. Part No.MPZ2012S331AT
BrandTDK
$0.092
Each (In a Bag of 100)
units
0805 (2012M) - - - - - - 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - - -
RS Stock No. 741-3119
Mfr. Part No.MMZ1608A252BT
BrandTDK
$0.073
Each (In a Bag of 100)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line A
RS Stock No. 109-4152
Mfr. Part No.MMZ1608S601AT
BrandTDK
$0.032
Each (On a Reel of 4000)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line S
RS Stock No. 109-4153
Mfr. Part No.MMZ1608Y152BT
BrandTDK
$0.032
Each (On a Reel of 4000)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line Y
RS Stock No. 109-4155
Mfr. Part No.MMZ2012R601AT
BrandTDK
$0.042
Each (On a Reel of 4000)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line R
RS Stock No. 741-3122
Mfr. Part No.MMZ1608D301BT
BrandTDK
$0.089
Each (In a Bag of 100)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line D
RS Stock No. 741-3150
Mfr. Part No.MMZ1608Y102BT
BrandTDK
$0.072
Each (In a Bag of 100)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line Y
RS Stock No. 786-5025
Mfr. Part No.MMZ1608S400AT
BrandTDK
$0.046
Each (In a Bag of 100)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line S
RS Stock No. 741-3169
Mfr. Part No.MMZ2012S181AT
BrandTDK
$0.064
Each (In a Bag of 100)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line S
RS Stock No. 786-5034
Mfr. Part No.MMZ1608S601AT
BrandTDK
$0.05
Each (In a Bag of 100)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line S
RS Stock No. 786-5040
Mfr. Part No.MMZ2012R102AT
BrandTDK
$0.082
Each (In a Bag of 100)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line R
RS Stock No. 604-1776
Mfr. Part No.MMZ1608Y152BT
BrandTDK
$0.128
Each (In a Pack of 10)
units
0603 (1608M) - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line Ferrite
RS Stock No. 741-3103
Mfr. Part No.MMZ1005S800CT
BrandTDK
$0.05
Each (In a Bag of 100)
units
0402 (1005M) - - - - - Chip Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Signal Line S
RS Stock No. 604-2038
Mfr. Part No.MMZ2012Y202BT
BrandTDK
$0.127
Each (In a Pack of 10)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line Ferrite
RS Stock No. 741-3175
Mfr. Part No.MPZ1005S300CT
BrandTDK
$0.091
Each (In a Bag of 100)
units
0402 (1005M) - - - - - - 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - - -
RS Stock No. 109-4154
Mfr. Part No.MMZ2012R102AT
BrandTDK
$0.05
Each (On a Reel of 4000)
units
0805 (2012M) - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line R