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 230-3783
製造零件編號BLM18AG102SN1D
BrandMurata
TWD2.20
/個 (每包:20個)
單位
0603 (1608M) - 1000Ω - - - 400mA 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 161-8072
製造零件編號BLM18AG121SN1D
BrandMurata
TWD0.70
個 (在毎卷:4000)
單位
0603 (1608M) - 120Ω - - - 500mA 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 109-4155
製造零件編號MMZ2012R601AT
BrandTDK
TWD0.70
個 (在毎卷:4000)
單位
0805 (2012M) - 600Ω - - - 500mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS庫存編號 109-4158
製造零件編號MMZ2012Y202BT
BrandTDK
TWD0.90
個 (在毎卷:4000)
單位
0805 (2012M) - 2000Ω - - - 400mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS庫存編號 125-3123
製造零件編號BLM18AG102SN1D
BrandMurata
TWD0.70
個 (在毎卷:4000)
單位
0603 (1608M) - 1000Ω - - - 400mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression, General Electronics
RS庫存編號 166-9870
製造零件編號BLM21PG600SN1D
BrandMurata
TWD0.90
個 (在毎卷:4000)
單位
0805 (2012M) - 60Ω - - - 3.5A 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 166-9556
製造零件編號BLM15AG121SN1D
BrandMurata
TWD0.60
個 (在毎卷:10000)
單位
0402 (1005M) - 120Ω - - - 550mA 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 747-4726
製造零件編號BLM18KG471SN1D
BrandMurata
TWD1.20
個 (以毎袋:100)
單位
0603 (1608M) - 470Ω - - - 1.5A 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 741-3129
製造零件編號MMZ1608R102AT
BrandTDK
TWD1.00
個 (以毎袋:100)
單位
0603 (1608M) - 1000Ω - - - 400mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS庫存編號 741-3113
製造零件編號MMZ1608D121BT
BrandTDK
TWD1.70
個 (以毎袋:100)
單位
0603 (1608M) - 120Ω - - - 400mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS庫存編號 786-5078
製造零件編號MMZ2012Y202BT
BrandTDK
TWD1.60
個 (以毎袋:100)
單位
0805 (2012M) - 2000Ω - - - 400mA Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS庫存編號 741-3150
製造零件編號MMZ1608Y102BT
BrandTDK
TWD1.20
個 (以毎袋:100)
單位
0603 (1608M) - 1000Ω - - - 400mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS庫存編號 125-3155
製造零件編號BLM31PG391SN1L
BrandMurata
TWD3.00
個 (在毎卷:3000)
單位
1206 (3216M) - 390Ω - - - 2A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - EMI Suppression Filter, Power Supplies
RS庫存編號 170-5853
製造零件編號BLM18BB100SN1D
BrandMurata
TWD0.70
個 (在毎卷:4000)
單位
0603 (1608M) - 10Ω - - - 500mA 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 724-1542
製造零件編號BLM21PG600SN1D
BrandMurata
TWD2.00
/個 (每包:25個)
單位
0805 (2012M) - 60Ω - - - 3.5A 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 724-1570
製造零件編號BLM31PG391SN1L
BrandMurata
TWD5.80
/個 (每包:25個)
單位
1206 (3216M) - 390Ω - - - 2A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - EMI Suppression Filter, Power Supplies
RS庫存編號 202-3550
製造零件編號BLM18AG121SN1D
BrandMurata
TWD2.20
/個 (每包:20個)
單位
0603 (1608M) - 120Ω - - - 500mA 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 724-1255
製造零件編號BLM15AG121SN1D
BrandMurata
TWD1.60
/個 (每包:25個)
單位
0402 (1005M) - 120Ω - - - 550mA 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 888-3428
製造零件編號28B0355-000
TWD5.30
/個 (每包:500個)
單位
0355 110Ω 205Ω 360Ω - - - Cylindrical EMI Core 9 x 20mm 20mm - - 9mm EMI Suppression
RS庫存編號 619-7532
製造零件編號BLM18TG102TN1D
BrandMurata
TWD0.90
/個 (每包:250個)
單位
0603 (1608M) - 1000Ω - - - 100mA Chip Ferrite Bead 1.6 x 0.8 x 0.6mm 1.6mm 0.8mm 0.6mm - EMI Suppression Filter, General Use