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. 161-6309
Mfr. Part No.BMB2A0060LN2
SGD0.087
Each (On a Reel of 4000)
units
0805 (2012M) - 60Ω - - - 850mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS Stock No. 164-5313
Mfr. Part No.BMB2A0300LN2
SGD0.087
Each (On a Reel of 4000)
units
0805 (2012M) - 300Ω - - - 600mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS Stock No. 812-0764
Mfr. Part No.BMB2A0060LN2
SGD0.137
Each (In a Bag of 100)
units
0805 (2012M) - 60Ω - - - 850mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS Stock No. 812-0767
Mfr. Part No.BMB2A0300LN2
SGD0.136
Each (In a Bag of 100)
units
0805 (2012M) - 300Ω - - - 600mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS Stock No. 863-7095
Mfr. Part No.1879855-4
SGD0.173
Each (In a Bag of 100)
units
0402 (1005M) - 120Ω - - - 500mA Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS Stock No. 164-5696
Mfr. Part No.1879855-4
SGD0.102
Each (On a Reel of 10000)
units
0402 (1005M) - 120Ω - - - 500mA Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS Stock No. 863-7326
Mfr. Part No.5-1624116-3
SGD0.177
Each (In a Bag of 100)
units
0603 (1608M) - 220Ω - - - 2A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS Stock No. 863-7240
Mfr. Part No.4-1624116-1
SGD0.177
Each (In a Bag of 100)
units
0603 (1608M) - 70Ω - - - 200mA Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS Stock No. 164-5801
Mfr. Part No.3-1624116-9
SGD0.099
Each (On a Reel of 4000)
units
0603 (1608M) - 1500Ω - - - 200mA Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS Stock No. 164-5628
Mfr. Part No.1-1879855-0
SGD0.102
Each (On a Reel of 10000)
units
0402 (1005M) - 22Ω - - - 300mA Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS Stock No. 164-5824
Mfr. Part No.4-1624116-1
SGD0.099
Each (On a Reel of 4000)
units
0603 (1608M) - 70Ω - - - 200mA Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS Stock No. 162-0099
Mfr. Part No.BMB2A1000BN3
SGD0.106
Each (On a Reel of 4000)
units
0805 (2012M) - 1000Ω - - - 200mA Chip Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Frequency
RS Stock No. 164-5634
Mfr. Part No.1-1879855-5
SGD0.075
Each (On a Reel of 10000)
units
0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS Stock No. 164-5875
Mfr. Part No.5-1624117-5
SGD0.165
Each (On a Reel of 4000)
units
0805 (2012M) - 600Ω - - - 200mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS Stock No. 164-5831
Mfr. Part No.4-1624116-7
SGD0.106
Each (On a Reel of 4000)
units
0603 (1608M) - 10Ω - - - 5A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS Stock No. 164-5697
Mfr. Part No.1879855-5
SGD0.093
Each (On a Reel of 10000)
units
0402 (1005M) - 220Ω - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS Stock No. 863-7155
Mfr. Part No.3-1624116-5
SGD0.177
Each (In a Bag of 100)
units
0603 (1608M) - 450Ω - - - 200mA Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS Stock No. 164-5869
Mfr. Part No.5-1624116-9
SGD0.099
Each (On a Reel of 4000)
units
0603 (1608M) - 70Ω - - - 3A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS Stock No. 164-5860
Mfr. Part No.5-1624116-0
SGD0.099
Each (On a Reel of 4000)
units
0603 (1608M) - 60Ω - - - 3A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS Stock No. 863-7290
Mfr. Part No.5-1624117-6
SGD0.193
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