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 124-1835
製造零件編號742792651
HK$1.483
/個 (每包:50個)
單位
0603 (1608M) - 600Ω - - - 1A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - 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 144-9785
製造零件編號742792651
HK$1.185
個 (在毎卷:4000)
單位
603 - 600Ω - - - 1A Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - 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 724-1425
製造零件編號BLM18PG471SN1D
BrandMurata
HK$0.441
/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 125-3150
製造零件編號BLM18PG471SN1D
BrandMurata
HK$0.171
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 124-1839
製造零件編號742792040
HK$1.751
/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 741-3129
製造零件編號MMZ1608R102AT
BrandTDK
HK$0.368
個 (以毎袋:100)
單位
0603 (1608M) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS庫存編號 724-1447
製造零件編號BLM18SG121TN1D
BrandMurata
HK$0.61
/個 (每包:25個)
單位
0603 (1608M) - 120Ω - - - 3mA Chip Ferrite Bead 1.6 x 0.8 x 0.5mm 1.6mm 0.8mm 0.5mm - EMI Suppression Filter, Power Supplies (Low DC Resistance Type)
RS庫存編號 749-8328
製造零件編號74279226101
HK$5.644
個 (以毎袋:5)
單位
1812 (4532M) - 100Ω - - - 8A Bead 4.5 x 3.2 x 2.3mm 4.5mm 3.2mm 2.3mm - EMI Suppression, High Current
RS庫存編號 125-3151
製造零件編號BLM18SG121TN1D
BrandMurata
HK$0.244
個 (在毎卷:10000)
單位
0603 (1608M) - 120Ω - - - 3mA Chip Bead 1.6 x 0.8 x 0.5mm 1.6mm 0.8mm 0.5mm - EMI Suppression Filter, Power Supplies (Low DC Resistance Type)
RS庫存編號 144-9788
製造零件編號742792040
HK$1.38
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 166-9560
製造零件編號BLM15HG102SN1D
BrandMurata
HK$0.407
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
RS庫存編號 163-4003
製造零件編號74279226101
HK$4.542
個 (在毎卷:2500)
單位
1812 (4532M) - 100Ω - - - 8A Bead 4.5 x 3.2 x 2.3mm 4.5mm 3.2mm 2.3mm - EMI Suppression, High Current
RS庫存編號 724-1286
製造零件編號BLM15HG102SN1D
BrandMurata
HK$0.837
/個 (每包:25個)
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
RS庫存編號 741-3191
製造零件編號MPZ2012S331AT
BrandTDK
HK$0.395
個 (以毎袋:100)
單位
0805 (2012M) - - - - - - - 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - -
RS庫存編號 724-1242
製造零件編號BLA31AG102SN4D
BrandMurata
HK$4.23
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 167-4201
製造零件編號BLM18EG121SN1D
BrandMurata
HK$0.522
個 (在毎卷:4000)
單位
0603 (1608M) - 120Ω - - - 2A Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS庫存編號 724-1356
製造零件編號BLM18HD601SN1D
BrandMurata
HK$0.899
/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 166-9836
製造零件編號BLM15BD471SN1D
BrandMurata
HK$0.184
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 888-3361
製造零件編號28A2029-0A2
HK$10.575
/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 109-4151
製造零件編號MPZ1608S221AT
BrandTDK
HK$0.268
個 (在毎卷:4000)
單位
0603 (1608M) - - - - - - - 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - -