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 888-3409
製造零件編號28A5131-0A2
TWD463.00
單位
5131 187Ω 425Ω 533Ω - - - Snap-On EMI Core, Split EMI Core 56.63 x 45 x 56.64mm 56.63mm 45mm 56.64mm - EMI Suppression
RS庫存編號 724-1532
製造零件編號BLM21PG221SN1D
BrandMurata
TWD2.00
/個 (每包:25個)
單位
0805 (2012M) - 220Ω - - - 2A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS庫存編號 888-3484
製造零件編號28B1225-000
TWD33.90
/個 (每包:50個)
單位
1225 68Ω 140Ω 270Ω - - - Cylindrical EMI Core 31.12 x 15.93mm 15.93mm - - 31.12mm EMI Suppression
RS庫存編號 125-3154
製造零件編號BLM21PG331SN1D
BrandMurata
TWD0.80
個 (在毎卷:4000)
單位
0805 (2012M) - 330Ω - - - 1.5A Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression, Power Supplies
RS庫存編號 724-1548
製造零件編號BLM21PG331SN1J
BrandMurata
TWD6.00
/個 (每包:25個)
單位
0805 (2012M) - 330Ω - - - 1.5A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS庫存編號 724-1545
製造零件編號BLM21PG331SN1D
BrandMurata
TWD2.60
/個 (每包:25個)
單位
0805 (2012M) - 330Ω - - - 1.5A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS庫存編號 169-6263
製造零件編號BLM21PG331SN1J
BrandMurata
TWD1.50
個 (在毎卷:10000)
單位
0805 (2012M) - 330Ω - - - 1.5A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS庫存編號 724-1598
製造零件編號BLM41PG102SN1L
BrandMurata
TWD9.20
/個 (每包:25個)
單位
1806 (4516M) - 1000Ω - - - 1.5A Chip Ferrite Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Power Supplies
RS庫存編號 724-1425
製造零件編號BLM18PG471SN1D
BrandMurata
TWD2.00
/個 (每包:25個)
單位
0603 (1608M) - 470Ω - - - 1A Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, Power Supplies
RS庫存編號 124-1839
製造零件編號742792040
TWD6.00
/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 863-7164
製造零件編號3-1624116-9
TWD2.30
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 164-5801
製造零件編號3-1624116-9
TWD2.00
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 888-3049
製造零件編號HI1206T500R-10
TWD0.80
/個 (每包:1000個)
單位
1206 (3216M) 19Ω 50Ω - - 70Ω 6A Chip Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS庫存編號 144-9788
製造零件編號742792040
TWD4.90
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 125-3150
製造零件編號BLM18PG471SN1D
BrandMurata
TWD0.70
個 (在毎卷:4000)
單位
0603 (1608M) - 470Ω - - - 1A Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression, Power Supplies
RS庫存編號 724-1251
製造零件編號BLM15AG102SN1D
BrandMurata
TWD1.60
/個 (每包:25個)
單位
0402 (1005M) - 1000Ω - - - 300mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, General Use
RS庫存編號 888-3513
製造零件編號28F0181-1SR-10
TWD5.80
/個 (每包:100個)
單位
3818 (9646M) 72Ω 115Ω - - 123Ω 10A Bead 4.57 x 2.54 x 8.51mm 4.57mm 2.54mm 8.51mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS庫存編號 839-0777
製造零件編號BLM03AX601SN1D
BrandMurata
TWD1.10
個 (以毎袋:50)
單位
0201 (0603M) - 600Ω - - - 250mA Chip Ferrite Bead 0.6 x 0.3 x 0.3mm 0.6mm 0.3mm 0.3mm - EMI Suppression Filter, General Use
RS庫存編號 167-4862
製造零件編號BLM03AX601SN1D
BrandMurata
TWD0.80
個 (在毎卷:15000)
單位
0201 (0603M) - 600Ω - - - 250mA Chip Ferrite Bead 0.6 x 0.3 x 0.3mm 0.6mm 0.3mm 0.3mm - EMI Suppression Filter, General Use
RS庫存編號 166-9560
製造零件編號BLM15HG102SN1D
BrandMurata
TWD1.90
個 (在毎卷:10000)
單位
0402 (1005M) - 1000Ω - - - 250mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, GHz Band General Use