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

DVDs

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. 786-5078
Mfr. Part No.MMZ2012Y202BT
BrandTDK
TWD1.80
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
RS Stock No. 786-5056
Mfr. Part No.MMZ2012R601AT
BrandTDK
TWD1.60
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
RS Stock No. 109-4155
Mfr. Part No.MMZ2012R601AT
BrandTDK
TWD0.70
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
RS Stock No. 741-3113
Mfr. Part No.MMZ1608D121BT
BrandTDK
TWD1.70
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
RS Stock No. 604-2218
Mfr. Part No.MPZ2012S221AT
BrandTDK
TWD3.30
Each (In a Pack of 10)
units
0805 - - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Power Line
RS Stock No. 604-2038
Mfr. Part No.MMZ2012Y202BT
BrandTDK
TWD3.20
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
RS Stock No. 741-3129
Mfr. Part No.MMZ1608R102AT
BrandTDK
TWD1.50
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
RS Stock No. 741-3150
Mfr. Part No.MMZ1608Y102BT
BrandTDK
TWD1.50
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
RS Stock No. 109-4158
Mfr. Part No.MMZ2012Y202BT
BrandTDK
TWD0.80
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
RS Stock No. 109-4151
Mfr. Part No.MPZ1608S221AT
BrandTDK
TWD0.70
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. 604-2246
Mfr. Part No.MPZ2012S601AT
BrandTDK
TWD3.30
Each (In a Pack of 10)
units
0805 - - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Power Line
RS Stock No. 109-4150
Mfr. Part No.MPZ1608B471AT
BrandTDK
TWD0.90
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 - Power Line
RS Stock No. 111-0871
Mfr. Part No.MPZ1608B471AT
BrandTDK
TWD0.90
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 - Power Line
RS Stock No. 741-3179
Mfr. Part No.MPZ1608B471AT
BrandTDK
TWD1.50
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 - Power Line
RS Stock No. 741-3191
Mfr. Part No.MPZ2012S331AT
BrandTDK
TWD1.60
Each (In a Bag of 100)
units
0805 (2012M) - - - - - - - 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - -
RS Stock No. 741-3194
Mfr. Part No.MPZ1608S221AT
BrandTDK
TWD1.20
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. 786-5040
Mfr. Part No.MMZ2012R102AT
BrandTDK
TWD1.60
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
RS Stock No. 604-1776
Mfr. Part No.MMZ1608Y152BT
BrandTDK
TWD2.50
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
RS Stock No. 109-4153
Mfr. Part No.MMZ1608Y152BT
BrandTDK
TWD0.60
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
RS Stock No. 741-3119
Mfr. Part No.MMZ1608A252BT
BrandTDK
TWD1.50
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