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. 863-7394
Mfr. Part No.6-1624116-2
R 1.276
Each (In a Bag of 100)
units
0603 (1608M) - 330Ω - - - 1.5A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS stock no. 164-5807
Mfr. Part No.3-1624117-6
R 0.576
Each (On a Reel of 4000)
units
0805 (2012M) - 120Ω - - - 300mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS stock no. 863-7111
Mfr. Part No.1879855-8
R 1.639
Each (In a Bag of 100)
units
0402 (1005M) - 600Ω - - - 200mA Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS stock no. 164-5866
Mfr. Part No.5-1624116-6
R 0.924
Each (On a Reel of 4000)
units
0603 (1608M) - 600Ω - - - 1.5A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS stock no. 863-7142
Mfr. Part No.3-1624116-3
R 1.276
Each (In a Bag of 100)
units
0603 (1608M) - 240Ω - - - 200mA Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS stock no. 164-5635
Mfr. Part No.1-1879855-6
R 1.127
Each (On a Reel of 10000)
units
0402 (1005M) - 10Ω - - - 1A Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - High Current, Noise Filtering
RS stock no. 164-5700
Mfr. Part No.1879855-7
R 1.127
Each (On a Reel of 10000)
units
0402 (1005M) - 470Ω - - - 300mA Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS stock no. 164-5872
Mfr. Part No.5-1624117-2
R 1.018
Each (On a Reel of 4000)
units
0805 (2012M) - 200Ω - - - 200mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS stock no. 863-7293
Mfr. Part No.5-1624117-7
R 1.544
Each (In a Bag of 100)
units
0805 (2012M) - 1000Ω - - - 100mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS stock no. 863-7388
Mfr. Part No.5-1624116-9
R 1.276
Each (In a Bag of 100)
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. 863-7114
Mfr. Part No.1879855-9
R 1.639
Each (In a Bag of 100)
units
0402 (1005M) - 1000Ω - - - 150mA Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS stock no. 164-5861
Mfr. Part No.5-1624116-1
R 0.924
Each (On a Reel of 4000)
units
0603 (1608M) - 120Ω - - - 2.5A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS stock no. 164-5837
Mfr. Part No.4-1624117-2
R 0.702
Each (On a Reel of 4000)
units
0805 (2012M) - 1000Ω - - - 100mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS stock no. 164-5636
Mfr. Part No.1-1879855-7
R 0.884
Each (On a Reel of 10000)
units
0402 (1005M) - 120Ω - - - 1.5A Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - High Current, Noise Filtering
RS stock no. 164-5842
Mfr. Part No.4-1624117-6
R 0.696
Each (On a Reel of 4000)
units
0805 (2012M) - 2700Ω - - - 100mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS stock no. 863-7102
Mfr. Part No.1879855-7
R 1.639
Each (In a Bag of 100)
units
0402 (1005M) - 470Ω - - - 300mA Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS stock no. 863-7278
Mfr. Part No.5-1624117-0
R 0.938
Each (In a Bag of 100)
units
0805 (2012M) - 100Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS stock no. 863-7297
Mfr. Part No.1-1879855-6
R 1.639
Each (In a Bag of 100)
units
0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - High Current, Noise Filtering
RS stock no. 164-5804
Mfr. Part No.3-1624117-4
R 0.576
Each (On a Reel of 4000)
units
0805 (2012M) - 30Ω - - - 500mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS stock no. 812-0777
Mfr. Part No.BMB2A0120AN4
R 0.865
Each (In a Bag of 100)
units
0805 (2012M) - 120Ω - - - 300mA Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - EMI Filtering, General Electronics