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. 888-3339
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0593 186Ω 407Ω 575Ω - - - Snap-On EMI Core, Split EMI Core 18.75 x 52.91mm 52.91mm - 18.75mm 18.75mm EMI Suppression
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0625 79Ω 163Ω 273Ω - - - Cylindrical EMI Core 15.88 x 14.27mm 14.27mm - - 15.88mm EMI Suppression
RS-stocknr. 888-3557
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1,924 €
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163090 - - 210Ω 260Ω 200Ω - Snap-On EMI Core, Split EMI Core 20.07 x 41.55 x 21.57mm 20.07mm 41.55mm 21.57mm - EMI Suppression
RS-stocknr. 888-3030
FabrikantnummerHI1206T161R-10
0,053 €
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Aantal stuks
1206 (3216M) 71Ω 160Ω - 220Ω 127Ω 6A Chip Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS-stocknr. 888-3320
Fabrikantnummer28A0350-0B2
0,833 €
Each (In a Pack of 50)
Aantal stuks
0350 100Ω 240Ω 400Ω - - - Snap-On EMI Core, Split EMI Core 13 x 25.5 x 11.7mm 25.5mm 25.5mm 11.7mm 13mm EMI Suppression
RS-stocknr. 888-3263
FabrikantnummerMI0805M221R-10
0,052 €
Each (In a Pack of 500)
Aantal stuks
0805 (2012M) 100Ω 220Ω - 274Ω 115Ω 2.5A Chip Bead 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS-stocknr. 888-3336
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0,96 €
Each (In a Pack of 50)
Aantal stuks
0592 232Ω 511Ω 627Ω - - - Snap-On EMI Core, Split EMI Core 18.75 x 53.39mm 53.39mm - 18.75mm 18.75mm EMI Suppression
RS-stocknr. 888-3345
Fabrikantnummer28A1507-0A2
0,398 €
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Aantal stuks
1507 56Ω 123Ω 246Ω - - - Snap-On EMI Core, Split EMI Core 15 x 18mm 18mm - 22mm 15mm EMI Suppression
RS-stocknr. 888-3364
Fabrikantnummer28A2026-0A2
0,84 €
Each (In a Pack of 50)
Aantal stuks
2026 95Ω 270Ω 460Ω - - - Snap-On EMI Core, Split EMI Core 21 x 41.7 x 21mm 41.7mm 41.7mm 21mm 21mm EMI Suppression
RS-stocknr. 888-3507
Fabrikantnummer28C0236-0EW-10
0,33 €
Each (In a Pack of 100)
Aantal stuks
Axial 620Ω 998Ω - 484Ω 205Ω 5A Ferrite Bead on Wire 0.236 (Dia.) x 0.394mm 1.989mm 0.394mm - 0.236mm Automotive, EMI Suppression, LCD-TV, Power Line, Telecom, Test Equipment
RS-stocknr. 888-3484
Fabrikantnummer28B1225-000
0,833 €
Each (In a Pack of 50)
Aantal stuks
1225 68Ω 140Ω 270Ω - - - Cylindrical EMI Core 31.12 x 15.93mm 15.93mm - - 31.12mm EMI Suppression
RS-stocknr. 888-3519
Fabrikantnummer28F0121-1SR-10
0,236 €
Each (In a Pack of 100)
Aantal stuks
3812 (9630M) 60Ω 96Ω - - 114Ω 10A Bead 3.05 x 2.54 x 8.51mm 3.05mm 2.54mm 8.51mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS-stocknr. 888-3487
Fabrikantnummer28B0735-300
0,335 €
Each (In a Pack of 100)
Aantal stuks
0735 73Ω 150Ω 270Ω - - - Cylindrical EMI Core 18.67 x 14.27mm 14.27mm - - 18.67mm EMI Suppression
RS-stocknr. 888-3377
Fabrikantnummer28A2736-0A2
0,706 €
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2736 120Ω 220Ω 360Ω - - - Snap-On EMI Core, Split EMI Core 19.7 x 35.1 x 18mm 35.1mm 35.1mm 18mm 19.7mm EMI Suppression
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5,52 €
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5776 115Ω 210Ω 360Ω - - - Snap-On EMI Core, Split EMI Core 29.2 x 42 x 42mm 29.2mm 42mm 42mm - EMI Suppression
RS-stocknr. 888-3383
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0,98 €
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2913 86Ω 177Ω 305Ω - - - Snap-On EMI Core, Split EMI Core 23.5 x 36.25mm 36.25mm - 22mm 23.5mm EMI Suppression
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Each (In a Pack of 500)
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1806 (4516M) 28Ω 60Ω - 87Ω 92Ω 6A Chip Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
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Each (In a Pack of 10000)
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2738 106Ω 233Ω 366Ω - - - Snap-On EMI Core, Split EMI Core 19.7 x 35.1mm 35.1mm - 18mm 19.7mm EMI Suppression