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. 786-5025
Mfr. Part No.MMZ1608S400AT
BrandTDK
SGD0.05
Each (In a Bag of 100)
units
0603 (1608M) - 40Ω - - - 600mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 604-1631
Mfr. Part No.MMZ1608R300AT
BrandTDK
SGD0.14
Each (In a Pack of 10)
units
0603 (1608M) - 30Ω - - - 1.5A Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 741-3191
Mfr. Part No.MPZ2012S331AT
BrandTDK
SGD0.073
Each (In a Bag of 100)
units
0805 (2012M) - 330Ω - - - 2.5A Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - -
RS Stock No. 604-2167
Mfr. Part No.MPZ1608S601AT
BrandTDK
SGD0.111
Each (In a Pack of 10)
units
0603 - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Power Line
RS Stock No. 786-5047
Mfr. Part No.MMZ2012R301AT
BrandTDK
SGD0.078
Each (In a Bag of 100)
units
0805 (2012M) - 300Ω - - - 600mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS Stock No. 786-5037
Mfr. Part No.MMZ1608Y152BT
BrandTDK
SGD0.041
Each (In a Bag of 100)
units
0603 (1608M) - 1500Ω - - - 300mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 786-5059
Mfr. Part No.MMZ2012S102AT
BrandTDK
SGD0.071
Each (In a Bag of 100)
units
0805 (2012M) - 1000Ω - - - 500mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS Stock No. 786-5065
Mfr. Part No.MMZ2012Y102BT
BrandTDK
SGD0.079
Each (In a Bag of 100)
units
0805 (2012M) - 1000Ω - - - 500mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS Stock No. 741-3131
Mfr. Part No.MMZ1608R301AT
BrandTDK
SGD0.048
Each (In a Bag of 100)
units
0603 (1608M) - 300Ω - - - 500mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 741-3147
Mfr. Part No.MMZ1608S181AT
BrandTDK
SGD0.054
Each (In a Bag of 100)
units
0603 (1608M) - 180Ω - - - 500mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 604-1776
Mfr. Part No.MMZ1608Y152BT
BrandTDK
SGD0.117
Each (In a Pack of 10)
units
0603 (1608M) - 1500Ω - - - 300mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 741-3103
Mfr. Part No.MMZ1005S800CT
BrandTDK
SGD0.045
Each (In a Bag of 100)
units
0402 (1005M) - 80Ω - - - 500mA Chip Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Signal Line
RS Stock No. 109-4154
Mfr. Part No.MMZ2012R102AT
BrandTDK
SGD0.043
Each (On a Reel of 4000)
units
0805 (2012M) - 1000Ω - - - 500mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS Stock No. 786-5040
Mfr. Part No.MMZ2012R102AT
BrandTDK
SGD0.068
Each (In a Bag of 100)
units
0805 (2012M) - 1000Ω - - - 500mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS Stock No. 741-3119
Mfr. Part No.MMZ1608A252BT
BrandTDK
SGD0.048
Each (In a Bag of 100)
units
0603 (1608M) - 2500Ω - - - 200mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 741-3090
Mfr. Part No.MMZ1005D121CT
BrandTDK
SGD0.048
Each (In a Bag of 100)
units
0402 (1005M) - 120Ω - - - 350mA Chip Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Signal Line
RS Stock No. 786-5069
Mfr. Part No.MMZ2012Y152BT
BrandTDK
SGD0.059
Each (In a Bag of 100)
units
0805 (2012M) - 1500Ω - - - 500mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS Stock No. 741-3163
Mfr. Part No.MMZ2012S601AT
BrandTDK
SGD0.081
Each (In a Bag of 100)
units
0805 (2012M) - 600Ω - - - 500mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS Stock No. 741-3175
Mfr. Part No.MPZ1005S300CT
BrandTDK
SGD0.081
Each (In a Bag of 100)
units
0402 (1005M) - 30Ω - - - 1.7A Chip Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - -
RS Stock No. 111-0871
Mfr. Part No.MPZ1608B471AT
BrandTDK
SGD0.042
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 - Power Line