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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Omschrijving Prijs 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-stocknr. 162-1665
FabrikantnummerBMB2A0120AN4
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0,03 €
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0805 (2012M) - 120Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - EMI Filtering, General Electronics
RS-stocknr. 863-7095
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0402 (1005M) - 120Ω - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS-stocknr. 863-7237
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0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS-stocknr. 164-5314
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0,058 €
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0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS-stocknr. 863-7098
Fabrikantnummer1879855-2
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0,045 €
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Aantal stuks
0402 (1005M) - 30Ω - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS-stocknr. 161-5745
FabrikantnummerBMB2A0120BN3
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0,039 €
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0805 (2012M) - 120Ω - - - - Chip Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Frequency
RS-stocknr. 164-5863
Fabrikantnummer5-1624116-3
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0,051 €
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0603 (1608M) - 220Ω - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS-stocknr. 863-7354
Fabrikantnummer6-1624117-3
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0,067 €
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0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Current, Noise Filtering
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0805 (2012M) - - - - - - Chip Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Frequency
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Fabrikantnummer1879855-7
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0,042 €
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0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS-stocknr. 863-7146
Fabrikantnummer3-1624116-4
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0,059 €
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0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS-stocknr. 164-5861
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0,049 €
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0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS-stocknr. 164-5796
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0,049 €
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0603 (1608M) - 450Ω - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS-stocknr. 863-7120
Fabrikantnummer2-1624116-7
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0,059 €
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0603 (1608M) - 60Ω - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS-stocknr. 863-7256
Fabrikantnummer4-1624116-4
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0,059 €
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Aantal stuks
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS-stocknr. 863-7341
Fabrikantnummer5-1624117-8
FabrikantTE Connectivity
0,067 €
Each (In a Bag of 100)
Aantal stuks
0805 (2012M) - 10Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Current, Noise Filtering
RS-stocknr. 164-5701
Fabrikantnummer1879855-8
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0,042 €
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Aantal stuks
0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS-stocknr. 164-5839
Fabrikantnummer4-1624117-4
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0,03 €
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0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS-stocknr. 863-7316
Fabrikantnummer4-1624116-9
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0,068 €
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0603 (1608M) - 30Ω - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS-stocknr. 863-7332
Fabrikantnummer5-1624116-6
FabrikantTE Connectivity
0,059 €
Each (In a Bag of 100)
Aantal stuks
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering