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

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庫存編號 144-9785
製造零件編號742792651
HK$1.15
個 (在毎卷:4000)
單位
603 - 600Ω - - - 1A 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 124-1835
製造零件編號742792651
HK$1.44
/個 (每包:50個)
單位
0603 (1608M) - 600Ω - - - 1A 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 124-1839
製造零件編號742792040
HK$1.854
/個 (每包:50個)
單位
0805 (2012M) - 600Ω - - - 2A Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - 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 749-8328
製造零件編號74279226101
HK$5.644
個 (以毎袋:5)
單位
1812 (4532M) - 100Ω - - - 8A Bead 4.5 x 3.2 x 2.3mm 4.5mm 3.2mm 2.3mm - EMI Suppression, High Current
RS庫存編號 163-4003
製造零件編號74279226101
HK$4.542
個 (在毎卷:2500)
單位
1812 (4532M) - 100Ω - - - 8A Bead 4.5 x 3.2 x 2.3mm 4.5mm 3.2mm 2.3mm - EMI Suppression, High Current
RS庫存編號 144-9788
製造零件編號742792040
HK$1.134
個 (在毎卷:4000)
單位
805 - 600Ω - - - 2A Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - 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 749-8299
製造零件編號74279224101
HK$9.33
個 (以毎袋:5)
單位
2220 (5650M) - 100Ω - - - 7A Bead 5.59 x 5.08 x 1.8mm 5.59mm 5.08mm 1.8mm - EMI Suppression, High Current
RS庫存編號 124-1859
製造零件編號74279267
HK$1.483
/個 (每包:50個)
單位
0603 (1608M) - 60Ω - - - 500mA 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 124-1521
製造零件編號74275043
HK$3.08
/個 (每包:20個)
單位
Radial 920Ω 961Ω - - - 3A Ferrite Bead 6 (Dia.) x 10mm 10mm - 10mm 6mm General Electronics
RS庫存編號 144-9856
製造零件編號7427512
HK$9.16
個 (在毎卷:1000)
單位
- - 580Ω - - - 5A Bead 11 x 4.65 x 5mm 11mm 4.65mm 5mm - EMI Suppression, RFI Suppression
RS庫存編號 144-9795
製造零件編號74279267
HK$1.127
個 (在毎卷:4000)
單位
603 - 60Ω - - - 500mA 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 736-2125
製造零件編號7427512
HK$11.47
個 (以毎袋:10)
單位
SMD - 580Ω - - - 5A Bead 11 x 4.65 x 5mm 11mm 4.65mm 5mm - EMI Suppression, RFI Suppression
RS庫存編號 163-3996
製造零件編號74279224101
HK$7.467
個 (在毎卷:2000)
單位
2220 (5650M) - 100Ω - - - 7A Bead 5.59 x 5.08 x 1.8mm 5.59mm 5.08mm 1.8mm - EMI Suppression, High Current
RS庫存編號 788-0109
製造零件編號742792780
HK$1.47
個 (以毎袋:10)
單位
0402 (1005M) - 220Ω - - - 300mA EMI Suppression 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Suppression Components
RS庫存編號 863-0895
製造零件編號74279228600
HK$2.45
個 (以毎袋:10)
單位
0603 (1608M) - 60Ω - - - 5.1A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - DC/DC Converter, High Current, Power Supply
RS庫存編號 163-3215
製造零件編號7427503
HK$2.92
個 (以毎袋:200)
單位
Axial - 600Ω - - - 200mA - 6 (Dia.) x 10mm 10mm - - 6mm General Electronics
RS庫存編號 146-0693
製造零件編號74279277
HK$1.44
/個 (每包:50個)
單位
0402 (1005M) - 70Ω - 91Ω - 500mA Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - Data Line Filter, Uncoupling of Distribution Voltage
RS庫存編號 669-4049
製造零件編號742792602
HK$1.47
/個 (每包:10個)
單位
0603 (1608M) - 60Ω - - - 3A EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS庫存編號 124-1518
製造零件編號7427504
HK$2.966
/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
RS庫存編號 163-3537
製造零件編號74279208
HK$1.174
個 (在毎卷:4000)
單位
0805 (2012M) - 40Ω - - - 500mA EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components