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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RS庫存編號 811-9629
製造零件編號BLM18RK471SN1D
BrandMurata
HK$0.485
個 (以毎袋:25)
單位
0603 (1608M) - 470Ω - - - 200mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Digital Interface, EMI Suppression Filter
RS庫存編號 166-9836
製造零件編號BLM15BD471SN1D
BrandMurata
HK$0.18
個 (在毎卷:10000)
單位
0402 (1005M) - 47Ω - - - 200mA Chip Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - General Electronics
RS庫存編號 167-4196
製造零件編號BLM18AG151SN1D
BrandMurata
HK$0.18
個 (在毎卷:4000)
單位
0603 (1608M) - 150Ω - - - 700mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, General Use
RS庫存編號 749-8299
製造零件編號74279224101
HK$10.154
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 122-5320
製造零件編號BLM18HB121SN1D
BrandMurata
HK$0.351
個 (在毎卷:4000)
單位
0603 (1608M) - 120Ω - - - 200mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - General Electronics
RS庫存編號 109-4151
製造零件編號MPZ1608S221AT
BrandTDK
HK$0.273
個 (在毎卷:4000)
單位
0603 (1608M) - - - - - - - 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS庫存編號 839-0819
製造零件編號BLM18KG300TN1D
BrandMurata
HK$0.314
個 (以毎袋:100)
單位
0603 (1608M) - 30Ω - - - 5A Chip Ferrite Bead 1.6 x 0.8 x 0.6mm 1.6mm 0.8mm 0.6mm - EMI Suppression Filter, Power Supplies (Low DC Resistance Type)
RS庫存編號 124-1521
製造零件編號74275043
HK$6.20
/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 125-3145
製造零件編號BLA31AG102SN4D
BrandMurata
HK$1.649
個 (在毎卷:4000)
單位
1206 (3216M) - 1000Ω - - - 50mA Chip Bead 3.2 x 1.6 x 0.8mm 3.2mm 1.6mm 0.8mm - EMI Suppression, General Electronics
RS庫存編號 888-3361
製造零件編號28A2029-0A2
HK$12.758
/個 (每包:50個)
單位
2029 95Ω 250Ω 420Ω - - - Cylindrical EMI Core 22.28 x 32.77 x 21.84mm 22.28mm 32.77mm 21.84mm - EMI Suppression
RS庫存編號 888-3462
製造零件編號28B0625-100
HK$6.395
/個 (每包:50個)
單位
0625 150Ω 280Ω 400Ω - - - Cylindrical EMI Core 15.88 x 28.58mm 28.58mm - - 15.88mm EMI Suppression
RS庫存編號 166-9851
製造零件編號BLM18HD601SN1D
BrandMurata
HK$0.414
個 (在毎卷:4000)
單位
0603 (1608M) - 600Ω - - - 100mA 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
RS庫存編號 163-3996
製造零件編號74279224101
HK$7.875
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 167-4992
製造零件編號BLM18KG300TN1D
BrandMurata
HK$0.197
個 (在毎卷:4000)
單位
0603 (1608M) - 30Ω - - - 5A Chip Ferrite Bead 1.6 x 0.8 x 0.6mm 1.6mm 0.8mm 0.6mm - EMI Suppression Filter, Power Supplies (Low DC Resistance Type)
RS庫存編號 724-1602
製造零件編號BLM41PG471SN1L
BrandMurata
HK$1.806
/個 (每包:25個)
單位
1806 (4516M) - 470Ω - - - 2A Chip Ferrite Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Power Supplies
RS庫存編號 166-9690
製造零件編號BL03RN2R1M1B
BrandMurata
HK$0.773
個 (以毎袋:1000)
單位
Radial - - - - - 6A EMI Suppression 8.3 x 2.3 x 6.5mm 8.3mm 2.3mm 6.5mm - -
RS庫存編號 230-3783
製造零件編號BLM18AG102SN1D
BrandMurata
HK$0.576
/個 (每包:20個)
單位
0603 (1608M) - 1000Ω - - - 450mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, General Use
RS庫存編號 467-3797
製造零件編號2944666631
BrandFair-Rite
HK$3.182
/個 (每包:10個)
單位
Radial - 690Ω - - - - Bead 6 (Dia.) x 10mm 10mm - - 6mm EMI Suppression
RS庫存編號 724-1356
製造零件編號BLM18HD601SN1D
BrandMurata
HK$0.916
/個 (每包:25個)
單位
0603 (1608M) - 600Ω - - - 100mA 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
RS庫存編號 104-8533
製造零件編號BLM18PG330SH1D
BrandMurata
HK$0.388
/個 (每包:200個)
單位
0603 (1608M) - 33Ω - - - 3A Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Automotive, Powertrain, Safety