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. 888-3327
Mfr. Part No.28A0434-0A2
SGD1.138
Each (In a Pack of 50)
units
0434 111Ω 277Ω 449Ω - - - Snap-On EMI Core, Split EMI Core 14.71 x 433mm 433mm - - 14.71mm EMI Suppression
RS Stock No. 888-3553
Mfr. Part No.HFA150068-0A2
SGD3.635
Each (In a Pack of 10)
units
150068 - - 275Ω - - Snap-On EMI Core, Split EMI Core 21 x 41.7 x 21mm 21mm 41.7mm 21mm - EMI Suppression
RS Stock No. 888-3339
Mfr. Part No.28A0593-0A2
SGD1.614
Each (In a Pack of 50)
units
0593 186Ω 407Ω 575Ω - - - Snap-On EMI Core, Split EMI Core 18.75 x 52.91mm 52.91mm - - 18.75mm EMI Suppression
RS Stock No. 888-3355
Mfr. Part No.28A2025-0A2
SGD1.147
Each (In a Pack of 50)
units
2025 130Ω 320Ω 510Ω - - - Snap-On EMI Core, Split EMI Core 18.15 x 32.5 x 18.9mm 18.15mm 32.5mm 18.9mm - EMI Suppression
RS Stock No. 888-3342
Mfr. Part No.28A0807-0A2
SGD2.323
Each (In a Pack of 50)
units
0807 160Ω 348Ω 514Ω - - - Snap-On EMI Core, Split EMI Core 24.82 x 55.91mm 55.91mm - - 24.82mm EMI Suppression
RS Stock No. 888-3106
Mfr. Part No.HR2220V801R-10
SGD1.749
Each (In a Pack of 50)
units
2220 (5650M) 150Ω 800Ω - - 75Ω 8A Chip Bead 5.59 x 5.08 x 3.61mm 5.59mm 5.08mm 3.61mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS Stock No. 888-3351
Mfr. Part No.28A2025-0A0
SGD1.173
Each (In a Pack of 50)
units
2025 130Ω 320Ω 510Ω - - - Cylindrical EMI Core 18.15 x 32.5 x 18.9mm 18.15mm 32.5mm 18.9mm - EMI Suppression
RS Stock No. 888-3373
Mfr. Part No.28A2432-0A2
SGD1.649
Each (In a Pack of 50)
units
2432 62Ω 160Ω 300Ω - - - Snap-On EMI Core, Split EMI Core 19.2 x 19.9mm 19.9mm - - 19.2mm EMI Suppression
RS Stock No. 888-3257
Mfr. Part No.MI0805K400R-10
SGD0.077
Each (In a Pack of 500)
units
0805 (2012M) 19Ω 40Ω - - 63Ω 1.5A 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 Stock No. 888-3030
Mfr. Part No.HI1206T161R-10
SGD0.111
Each (In a Pack of 500)
units
1206 (3216M) 71Ω 160Ω - - 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 Stock No. 888-3074
Mfr. Part No.HI2220Q401R-10
SGD0.627
Each (In a Pack of 50)
units
2220 (5650M) 100Ω 400Ω - - 99Ω 4.5A Chip Bead 5.59 x 5.08 x 3.2mm 5.59mm 5.08mm 3.2mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS Stock No. 888-3358
Mfr. Part No.28A2024-0A2
SGD2.466
Each (In a Pack of 10)
units
2024 130Ω 280Ω 440Ω - - - EMI Cable Core 29 x 32.5 x 29.62mm 29mm 32.5mm 29.62mm - EMI Suppression
RS Stock No. 888-3569
Mfr. Part No.HFA259131-0A2
SGD10.27
Each
units
259131 - - 250Ω - - Snap-On EMI Core, Split EMI Core 29 x 32.5 x 29.62mm 29mm 32.5mm 29.62mm - EMI Suppression
RS Stock No. 888-3049
Mfr. Part No.HI1206T500R-10
SGD0.041
Each (In a Pack of 1000)
units
1206 (3216M) 19Ω 50Ω - - 70Ω 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 Stock No. 888-3487
Mfr. Part No.28B0735-300
SGD0.466
Each (In a Pack of 100)
units
0735 73Ω 150Ω 270Ω - - - Cylindrical EMI Core 18.67 x 14.27mm 14.27mm - - 18.67mm EMI Suppression
RS Stock No. 888-3345
Mfr. Part No.28A1507-0A2
SGD0.767
Each (In a Pack of 50)
units
1507 56Ω 123Ω 246Ω - - - Snap-On EMI Core, Split EMI Core 150 x 180mm 180mm - - 150mm EMI Suppression
RS Stock No. 888-3395
Mfr. Part No.28A3851-0A2
SGD6.968
Each (In a Pack of 10)
units
3851 150Ω 260Ω 410Ω - - - Snap-On EMI Core, Split EMI Core 30 x 33.7 x 30mm 30mm 33.7mm 30mm - EMI Suppression
RS Stock No. 888-3024
Mfr. Part No.HI1206N101R-10
SGD0.10
Each (In a Pack of 500)
units
1206 (3216M) 41Ω 100Ω - - 145Ω 3A 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 Stock No. 888-3409
Mfr. Part No.28A5131-0A2
SGD29.59
Each
units
5131 187Ω 425Ω 533Ω - - - Snap-On EMI Core, Split EMI Core 56.63 x 45 x 56.64mm 56.63mm 45mm 56.64mm - EMI Suppression
RS Stock No. 888-3070
Mfr. Part No.HI2220P701R-10
SGD0.701
Each (In a Pack of 50)
units
2220 (5650M) 200Ω 700Ω - - 90Ω 4A Chip Bead 5.59 x 5.08 x 3.05mm 5.59mm 5.08mm 3.05mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security