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 164-5861
製造零件編號5-1624116-1
HK$0.602
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 166-9848
製造零件編號BLM18BD252SN1D
BrandMurata
HK$0.197
個 (在毎卷:4000)
單位
0603 (1608M) - 2500Ω - - - 150mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, High Speed Signal Lines
RS庫存編號 736-2128
製造零件編號7427521
HK$23.62
單位
SMD - 52Ω - - - 5A Bead 8.9 x 5.6 x 2.5mm 8.9mm 5.6mm 2.5mm - Common Mode Interference, General Electronics, Power Supply, Symmetric Data Lines
RS庫存編號 166-9826
製造零件編號BLM31PG121SN1L
BrandMurata
HK$0.781
個 (在毎卷:3000)
單位
1206 (3216M) - 120Ω - - - 3.5A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - EMI Suppression, Power Supplies
RS庫存編號 724-1334
製造零件編號BLM18GG471SN1D
BrandMurata
HK$1.323
/個 (每包:25個)
單位
0603 (1608M) - 470Ω - - - 200mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, High-GHz Band General Use
RS庫存編號 144-9857
製造零件編號7427521
HK$16.17
個 (在毎卷:2400)
單位
- - 52Ω - - - 5A Bead 8.9 x 5.6 x 2.5mm 8.9mm 5.6mm 2.5mm - Common Mode Interference, General Electronics, Power Supply, Symmetric Data Lines
RS庫存編號 795-7896
製造零件編號CIM10J471NC
HK$0.131
個 (在毎卷:4000)
單位
0603 (1608M) - 470Ω - - - 300mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression
RS庫存編號 144-9819
製造零件編號742792041
HK$1.38
個 (在毎卷:4000)
單位
0805 - 600Ω - - - 200mA - 2 x 1.2 x 0.9mm 2mm 1.24mm 0.9mm - General Electronics
RS庫存編號 792-6261
製造零件編號BLM18HK102SN1D
BrandMurata
HK$0.916
個 (以毎袋:25)
單位
0603 (1608M) - 1000Ω - - - 50mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band Digital Interface
RS庫存編號 749-8325
製造零件編號74279225101
HK$11.498
個 (以毎袋:5)
單位
3312 - 100Ω - - - 10A Bead 8.5 x 3.05 x 2.28mm 8.5mm 3.05mm 2.28mm - EMI Suppression, High Current
RS庫存編號 163-3999
製造零件編號74279224271
HK$7.875
個 (在毎卷:2000)
單位
2220 (5650M) - 270Ω - - - 4A Bead 5.59 x 5.08 x 3.2mm 5.59mm 5.08mm 3.2mm - EMI Suppression, High Current
RS庫存編號 124-1838
製造零件編號742792097
HK$1.89
/個 (每包:50個)
單位
0805 (2012M) - 1500Ω - - - 1A Ferrite Bead 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS庫存編號 167-4911
製造零件編號BLM15GA750SN1D
BrandMurata
HK$1.26
個 (在毎卷:10000)
單位
0402 (1005M) - 75Ω - - - 200mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, High-GHz Band High-speed signal lines
RS庫存編號 187-3467
製造零件編號BLM18BD252SH1D
BrandMurata
HK$0.225
個 (在毎卷:4000)
單位
0603 (1608M) - 2500Ω - - - 150mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -
RS庫存編號 104-8527
製造零件編號BLM18AG121SH1D
BrandMurata
HK$0.369
/個 (每包:200個)
單位
0603 (1608M) - 120Ω - - - 800mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Automotive, Powertrain, Safety
RS庫存編號 124-8150
製造零件編號BLA31AG121SN4D
BrandMurata
HK$2.888
/個 (每包:50個)
單位
1206 (3216M) - 120Ω - - - 150mA Chip Bead 3.2 x 1.6 x 0.8mm 3.2mm 1.6mm 0.8mm - General Use
RS庫存編號 164-5825
製造零件編號4-1624116-2
HK$0.602
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 724-1362
製造零件編號BLM18HG471SN1D
BrandMurata
HK$0.916
/個 (每包:25個)
單位
0603 (1608M) - 470Ω - - - 200mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band General Use
RS庫存編號 125-3153
製造零件編號BLM21AG601SN1D
BrandMurata
HK$0.288
個 (在毎卷:4000)
單位
0805 (2012M) - 600Ω - - - 700mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression, General Electronics
RS庫存編號 888-3055
製造零件編號HI1806T600R-10
HK$0.962
/個 (每包:500個)
單位
1806 (4516M) 28Ω 60Ω - - 92Ω 6A Chip Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security