Ferrite Beads

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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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. 870-9320
Mfr. Part No.Z0603C102BSMST
BrandKEMET
£0.021
Each (In a Pack of 4000)
Units
0603 (1608M) - 1000Ω - - - 200mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9358
Mfr. Part No.Z0603C601ESMST
BrandKEMET
£0.029
Each (In a Pack of 4000)
Units
0603 (1608M) - 600Ω - - - 300mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9339
Mfr. Part No.Z0603C102FSMST
BrandKEMET
£0.021
Each (In a Pack of 4000)
Units
0603 (1608M) - 1000Ω - - - 300mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9336
Mfr. Part No.Z0603C182DSMST
BrandKEMET
£0.028
Each (In a Pack of 4000)
Units
0603 (1608M) - 1800Ω - - - 200mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9323
Mfr. Part No.Z0402C601ESMST
BrandKEMET
£0.022
Each (In a Pack of 10000)
Units
0402 (1005M) - 600Ω - - - 300mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9301
Mfr. Part No.Z0402C102BSMST
BrandKEMET
£0.022
Each (In a Pack of 10000)
Units
0402 (1005M) - 1000Ω - - - 150mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9304
Mfr. Part No.Z0402C121ASMST
BrandKEMET
£0.022
Each (In a Pack of 10000)
Units
0402 (1005M) - 120Ω - - - 500mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9308
Mfr. Part No.Z0402C121BSMST
BrandKEMET
£0.029
Each (In a Pack of 10000)
Units
0402 (1005M) - 120Ω - - - 300mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9351
Mfr. Part No.Z0603C511CSMST
BrandKEMET
£0.028
Each (In a Pack of 4000)
Units
0603 (1608M) - 510Ω - - - 200mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9317
Mfr. Part No.Z0402C121ESMST
BrandKEMET
£0.029
Each (In a Pack of 10000)
Units
0402 (1005M) - 120Ω - - - 450mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9310
Mfr. Part No.Z0402C241CSMST
BrandKEMET
£0.029
Each (In a Pack of 10000)
Units
0402 (1005M) - 240Ω - - - 250mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9354
Mfr. Part No.Z0603C601BSMST
BrandKEMET
£0.028
Each (In a Pack of 4000)
Units
0603 (1608M) - 600Ω - - - 250mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9348
Mfr. Part No.Z0603C241CSMST
BrandKEMET
£0.028
Each (In a Pack of 4000)
Units
0603 (1608M) - 240Ω - - - 250mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9314
Mfr. Part No.Z0402C601ASMST
BrandKEMET
£0.022
Each (In a Pack of 10000)
Units
0402 (1005M) - 600Ω - - - 300mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9291
Mfr. Part No.Z0402C100ASMST
BrandKEMET
£0.029
Each (In a Pack of 10000)
Units
0402 (1005M) - 10Ω - - - 1A Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9345
Mfr. Part No.Z0603C220ASMST
BrandKEMET
£0.028
Each (In a Pack of 4000)
Units
0603 (1608M) - 22Ω - - - 1.5A Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9342
Mfr. Part No.Z0603C241ESMST
BrandKEMET
£0.028
Each (In a Pack of 4000)
Units
0603 (1608M) - 240Ω - - - 600mA Multilayer Chip Bead 40.64 x 20.32 x 20.32mm 40.64mm 20.32mm 20.32mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line
RS Stock No. 870-9326
Mfr. Part No.Z0402C680CSMST
BrandKEMET
£0.022
Each (In a Pack of 10000)
Units
0402 (1005M) - 68Ω - - - 400mA Multilayer Chip Bead 25.4 x 12.7 x 12.7mm 25.4mm 12.7mm 12.7mm - Digital Product Clock Lines, High Frequency Noise Counter, LSI Power Supplies, Mobile Devices, Noise Suppression, Signal Line