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 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 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 164-5635
製造零件編號1-1879855-6
HK$0.476
個 (在毎卷:10000)
單位
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 164-5872
製造零件編號5-1624117-2
HK$0.576
個 (在毎卷:4000)
單位
0805 (2012M) - 200Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS庫存編號 164-5835
製造零件編號4-1624117-0
HK$0.276
個 (在毎卷:4000)
單位
0805 (2012M) - 600Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS庫存編號 164-5636
製造零件編號1-1879855-7
HK$0.476
個 (在毎卷:10000)
單位
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 164-5827
製造零件編號4-1624116-4
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 - -
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 164-5313
製造零件編號BMB2A0300LN2
HK$0.437
個 (在毎卷:4000)
單位
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom
RS庫存編號 863-7247
製造零件編號4-1624116-3
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 863-7297
製造零件編號1-1879855-6
HK$0.458
個 (以毎袋:100)
單位
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 164-5700
製造零件編號1879855-7
HK$0.476
個 (在毎卷:10000)
單位
0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - -
RS庫存編號 863-7192
製造零件編號4-1624117-0
HK$0.394
個 (以毎袋:100)
單位
0805 (2012M) - 600Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS庫存編號 164-5797
製造零件編號3-1624116-6
HK$0.451
個 (在毎卷:4000)
單位
0603 (1608M) - 600Ω - - - - Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS庫存編號 863-7111
製造零件編號1879855-8
HK$0.463
個 (以毎袋:100)
單位
0402 (1005M) - - - - - - Ferrite Bead 1 x 0.5 x 0.32mm 1mm 0.5mm 0.32mm - General Purpose, High frequency
RS庫存編號 863-7388
製造零件編號5-1624116-9
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 - High Current, Noise Filtering
RS庫存編號 164-5836
製造零件編號4-1624117-1
HK$0.276
個 (在毎卷:4000)
單位
0805 (2012M) - 600Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - -
RS庫存編號 863-7284
製造零件編號5-1624117-3
HK$0.573
個 (以毎袋:100)
單位
0805 (2012M) - 300Ω - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - General Purpose, High frequency
RS庫存編號 863-7300
製造零件編號1-1879855-8
HK$0.463
個 (以毎袋:100)
單位
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 812-0764
製造零件編號BMB2A0060LN2
HK$0.706
個 (以毎袋:100)
單位
0805 (2012M) - - - - - - Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Signal Line, Telecom