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 863-7120
製造零件編號2-1624116-7
HK$0.577
個 (以毎袋:100)
單位
0603 (1608M) - 60Ω - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS庫存編號 863-7124
製造零件編號2-1624116-8
HK$0.577
個 (以毎袋:100)
單位
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS庫存編號 164-5797
製造零件編號3-1624116-6
HK$1,803.00
毎卷:4000 個
Reel(s)
0603 (1608M) - 600Ω - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS庫存編號 863-7344
製造零件編號5-1624117-9
HK$0.573
個 (以毎袋:100)
單位
0805 (2012M) - 20Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Current, Noise Filtering
RS庫存編號 812-0792
製造零件編號BMB2A0150AN1
HK$0.336
個 (以毎袋:100)
單位
0805 (2012M) - 150Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - EMI Filtering, General Electronics
RS庫存編號 863-7199
製造零件編號3-1624117-9
HK$0.394
個 (以毎袋:100)
單位
0805 (2012M) - 400Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS庫存編號 164-5873
製造零件編號5-1624117-3
HK$0.576
個 (在毎卷:4000)
單位
0805 (2012M) - 300Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS庫存編號 863-7304
製造零件編號4-1624116-7
HK$0.577
個 (以毎袋:100)
單位
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS庫存編號 863-7164
製造零件編號3-1624116-9
HK$0.577
個 (以毎袋:100)
單位
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS庫存編號 863-7203
製造零件編號4-1624117-4
HK$0.394
個 (以毎袋:100)
單位
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS庫存編號 164-5867
製造零件編號5-1624116-7
HK$0.451
個 (在毎卷:4000)
單位
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS庫存編號 863-7142
製造零件編號3-1624116-3
HK$0.577
個 (以毎袋:100)
單位
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS庫存編號 164-5905
製造零件編號6-1624117-6
HK$2,305.00
毎卷:4000 個
Reel(s)
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - High Current, Noise Filtering
RS庫存編號 164-5798
製造零件編號3-1624116-7
HK$1,803.00
毎卷:4000 個
Reel(s)
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS庫存編號 164-5825
製造零件編號4-1624116-2
HK$1,803.00
毎卷:4000 個
Reel(s)
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS庫存編號 863-7243
製造零件編號4-1624116-2
HK$0.577
個 (以毎袋:100)
單位
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Purpose, High frequency
RS庫存編號 164-5635
製造零件編號1-1879855-6
HK$4,759.00
毎卷:10000 個
Reel(s)
0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - High Current, Noise Filtering
RS庫存編號 164-5898
製造零件編號6-1624116-2
HK$0.451
個 (在毎卷:4000)
單位
0603 (1608M) - - - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - High Current, Noise Filtering
RS庫存編號 863-7293
製造零件編號5-1624117-7
HK$0.707
個 (以毎袋:100)
單位
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS庫存編號 812-0773
製造零件編號BMB2A0220AN4
HK$0.458
個 (以毎袋:100)
單位
0805 (2012M) - 220Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - EMI Filtering, General Electronics