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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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. 172-8755
FabrikantnummerCIM10J800NC
€ 0,013
Each (On a Reel of 10000)
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0603 (1608M) - 80Ω - - - 550mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression
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€ 0,089
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1210 (3225M) - 60Ω - - - 1.5A Chip Bead 3.2 x 2.5 x 1.3mm 3.2mm 2.5mm 1.3mm - EMI Suppression
RS-stocknr. 172-8756
FabrikantnummerCIM10J471NC
€ 0,011
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0603 (1608M) - 470Ω - - - 300mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression
RS-stocknr. 795-7644
FabrikantnummerCIC10J600NC
€ 0,004
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0603 (1608M) - 60Ω - - - 2A Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current
RS-stocknr. 795-7931
FabrikantnummerCIM10U800NC
€ 0,005
Each (On a Reel of 4000)
Aantal stuks
0603 (1608M) - 80Ω - - - 600mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression
RS-stocknr. 795-7681
FabrikantnummerCIC31P601NE
€ 0,054
Each (On a Reel of 3000)
Aantal stuks
1206 (3216M) - 600Ω - - - 1.5A Chip Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - High Current
RS-stocknr. 795-7893
FabrikantnummerCIM10J800NC
€ 0,013
Each (On a Reel of 4000)
Aantal stuks
0603 (1608M) - 80Ω - - - 550mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression
RS-stocknr. 795-7950
FabrikantnummerCIV05J102NC
€ 0,019
Each (On a Reel of 10000)
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0402 (1005M) - 1000Ω - - - 250mA Chip Bead 1.0 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Noise Suppression
RS-stocknr. 172-8768
FabrikantnummerCIM10U800NC
€ 0,005
Each (On a Reel of 10000)
Aantal stuks
0603 (1608M) - 80Ω - - - 600mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression
RS-stocknr. 795-7657
FabrikantnummerCIC10P471NC
€ 0,01
Each (On a Reel of 4000)
Aantal stuks
0603 (1608M) - 470Ω - - - 1.2A Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current
RS-stocknr. 795-7896
FabrikantnummerCIM10J471NC
€ 0,01
Each (On a Reel of 4000)
Aantal stuks
0603 (1608M) - 470Ω - - - 300mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression