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 724-1302
製造零件編號BLM18BB221SN1D
BrandMurata
TWD1.80
/個 (每包:25個)
單位
0603 (1608M) - 220Ω - - - 450mA 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 169-2757
製造零件編號BLM03AG102SN1D
BrandMurata
TWD1.10
個 (在毎卷:15000)
單位
0603 (1608M) - 1000Ω - - - 100mA Chip Bead 0.6 x 0.3 x 0.3mm 0.6mm 0.3mm 0.3mm - General Use
RS庫存編號 124-8151
製造零件編號BLM03AG102SN1D
BrandMurata
TWD1.60
/個 (每包:500個)
單位
0603 (1608M) - 1000Ω - - - 100mA Chip Bead 0.6 x 0.3 x 0.3mm 0.6mm 0.3mm 0.3mm - General Use
RS庫存編號 839-0796
製造零件編號BLM15PD300SN1D
BrandMurata
TWD1.40
個 (以毎袋:100)
單位
0402 (1005M) - 30Ω - - - 2.2A Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, Power Supplies
RS庫存編號 125-3156
製造零件編號BLM31PG330SN1L
BrandMurata
TWD3.00
個 (在毎卷:3000)
單位
1206 (3216M) - 33Ω - - - 6A Chip Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Power Supplies
RS庫存編號 166-9558
製造零件編號BLM15EG221SN1D
BrandMurata
TWD2.00
個 (在毎卷:10000)
單位
0402 (1005M) - 220Ω - - - 220mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS庫存編號 166-9842
製造零件編號BLM18BB221SN1D
BrandMurata
TWD0.70
個 (在毎卷:4000)
單位
0603 (1608M) - 220Ω - - - 450mA 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 167-4833
製造零件編號BLM15PD300SN1D
BrandMurata
TWD0.80
個 (在毎卷:10000)
單位
0402 (1005M) - 30Ω - - - 2.2A Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, Power Supplies
RS庫存編號 724-1273
製造零件編號BLM15EG221SN1D
BrandMurata
TWD3.90
/個 (每包:25個)
單位
0402 (1005M) - 220Ω - - - 220mA Chip Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS庫存編號 724-1576
製造零件編號BLM31PG330SN1L
BrandMurata
TWD5.80
/個 (每包:25個)
單位
1206 (3216M) - 33Ω - - - 6A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Power Supplies
RS庫存編號 811-9770
製造零件編號BLM18BB100SN1D
BrandMurata
TWD1.80
個 (以毎袋:25)
單位
0603 (1608M) - 10Ω - - - 700mA 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 724-1570
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 - Power Supplies
RS庫存編號 202-3550
製造零件編號BLM18AG121SN1D
BrandMurata
TWD2.40
/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 669-4099
製造零件編號742792022
TWD7.50
/個 (每包:10個)
單位
0805 (2012M) - 220Ω - - - 2A EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
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) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS庫存編號 604-2038
製造零件編號MMZ2012Y202BT
BrandTDK
TWD3.20
/個 (每包:10個)
單位
0805 (2012M) - - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS庫存編號 786-5078
製造零件編號MMZ2012Y202BT
BrandTDK
TWD1.40
個 (以毎袋:100)
單位
0805 (2012M) - - - - - - 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) - - - - - - Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - Signal Line
RS庫存編號 167-5789
製造零件編號BLM18KG471SN1D
BrandMurata
TWD0.70
個 (在毎卷:4000)
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
TWD1.40
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