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庫存編號 124-1518
製造零件編號7427504
HK$3.76
/個 (每包:20個)
單位
Axial 702Ω 773Ω - - - 3A Ferrite Bead 6 (Dia.) x 10mm - - 10mm 6mm Digital Devices, PCB, Radio Frequency Interferences, Text Processing
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/個 (每包:10個)
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0603 (1608M) - 47Ω - - - 500mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
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製造零件編號BLM18AG601SN1D
BrandMurata
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/個 (每包:25個)
單位
0603 (1608M) - 600Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, General Use
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製造零件編號742792662
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/個 (每包:100個)
單位
0603 (1608M) - 1000Ω - - - 600mA Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Anti EMI, Control Signals, DC/DC Converter, Fast Bus Signals, HDD, High Current, High Frequency, High Speed, Line Filter, LVDS, Power Supply, RS232, RS422, USB 2.0
RS庫存編號 888-3468
製造零件編號28B0625-000
HK$2.774
/個 (每包:100個)
單位
0625 79Ω 163Ω 273Ω - - - Cylindrical EMI Core 15.88 x 14.27mm 14.27mm - - 15.88mm EMI Suppression
RS庫存編號 111-0871
製造零件編號MPZ1608B471AT
BrandTDK
HK$0.222
個 (在毎卷:4000)
單位
0603 (1608M) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Power Line
RS庫存編號 125-3120
製造零件編號BLM41PG600SN1L
BrandMurata
HK$0.919
個 (在毎卷:2500)
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1806 (4516M) - 60Ω - - - 6A Chip Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - EMI Suppression, Power Supplies
RS庫存編號 792-6246
製造零件編號BLM18EG101TN1D
BrandMurata
HK$1.102
個 (以毎袋:25)
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0603 (1608M) - 100Ω - - - 2A Chip Ferrite Bead 1.6 x 0.8 x 0.5mm 1.6mm 0.8mm 0.5mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS庫存編號 870-9345
製造零件編號Z0603C220ASMST
BrandKEMET
HK$0.247
/個 (每包:4000個)
單位
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
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製造零件編號MPZ1608B471AT
BrandTDK
HK$0.222
個 (在毎卷:4000)
單位
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RS庫存編號 888-3443
製造零件編號28B0485-000
HK$2.917
/個 (每包:100個)
單位
0485 170Ω 320Ω 450Ω - - - Cylindrical EMI Core 12.32 x 25.4mm 25.4mm - - 12.32mm EMI Suppression
RS庫存編號 167-4980
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BrandMurata
HK$0.455
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0603 (1608M) - 1500Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band High-Speed Signal Line
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/個 (每包:25個)
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