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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Omschrijving Prijs 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-stocknr. 888-3320
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€ 0,833
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0350 100Ω 240Ω 400Ω - - - Snap-On EMI Core, Split EMI Core 13 x 25.5 x 11.7mm 13mm 25.5mm 11.7mm - EMI Suppression
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1020 147Ω 276Ω 412Ω - - - Cylindrical EMI Core 25.91 x 28.58mm 28.58mm - - 25.91mm EMI Suppression
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FabrikantnummerBLM41PG102SN1L
FabrikantMurata
€ 0,186
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1806 (4516M) - 1000Ω - - - 1.5A Chip Ferrite Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Power Supplies
RS-stocknr. 163-7794
Fabrikantnummer74275143
FabrikantWurth Elektronik
€ 0,647
Each (In a Tray of 200)
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Radial 920Ω 961Ω - - - 3A Ferrite Bead 6 (Dia.) x 10mm - - 10mm 6mm Protection Against Radio Frequency Interferences of Components on PCB's of PC's, Text Processing and Other Digital Devices
RS-stocknr. 724-1299
FabrikantnummerBLM18AG601SN1D
FabrikantMurata
€ 0,058
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0603 (1608M) - 600Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, General Use
RS-stocknr. 899-7286
Fabrikantnummer74275143
FabrikantWurth Elektronik
€ 1,006
Each (In a Bag of 5)
Aantal stuks
Radial 920Ω 961Ω - - - 3A Ferrite Bead 6 (Dia.) x 10mm - - 10mm 6mm Protection Against Radio Frequency Interferences of Components on PCB's of PC's, Text Processing and Other Digital Devices
RS-stocknr. 871-2067
FabrikantnummerBLM15BB100SN1D
FabrikantMurata
€ 0,029
Each (In a Bag of 250)
Aantal stuks
0402 (1005M) - 10Ω - - - 300mA Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - High Speed Signal Lines
RS-stocknr. 167-4905
FabrikantnummerBLM15BB100SN1D
FabrikantMurata
€ 196,00
1 Reel of 10000
Reel(s)
0402 (1005M) - 10Ω - - - 300mA Ferrite Bead 1 x 0.5 x 0.5mm 1mm 0.5mm 0.5mm - High Speed Signal Lines
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FabrikantnummerBLM21PG331SN1J
FabrikantMurata
€ 226,51
1 Reel of 10000
Reel(s)
0805 (2012M) - 330Ω - - - 1.5A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS-stocknr. 724-1548
FabrikantnummerBLM21PG331SN1J
FabrikantMurata
€ 0,07
Each (In a Pack of 25)
Aantal stuks
0805 (2012M) - 330Ω - - - 1.5A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
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FabrikantnummerBLM18HE152SN1D
FabrikantMurata
€ 0,11
Each (In a Bag of 25)
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0603 (1608M) - 1500Ω - - - 500mA 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
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Fabrikantnummer74279218
FabrikantWurth Elektronik
€ 475,20
1 Reel of 3000
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1206 - 600Ω - - - 2A Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - 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
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FabrikantnummerBLM21PG331SN1D
FabrikantMurata
€ 87,69
1 Reel of 4000
Reel(s)
0805 (2012M) - 330Ω - - - 1.5A Chip Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression, Power Supplies
RS-stocknr. 724-1545
FabrikantnummerBLM21PG331SN1D
FabrikantMurata
€ 0,07
Each (In a Pack of 25)
Aantal stuks
0805 (2012M) - 330Ω - - - 1.5A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS-stocknr. 167-4980
FabrikantnummerBLM18HE152SN1D
FabrikantMurata
€ 0,048
Each (On a Reel of 4000)
Aantal stuks
0603 (1608M) - 1500Ω - - - 500mA 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
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FabrikantWurth Elektronik
€ 0,196
Each (In a Pack of 50)
Aantal stuks
1206 (3216M) - 600Ω - - - 2A Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - 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-stocknr. 144-9791
Fabrikantnummer742792662
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€ 523,60
1 Reel of 4000
Reel(s)
603 - 1000Ω - - - 600mA 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
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FabrikantnummerBLM15EG221SN1D
FabrikantMurata
€ 0,049
Each (On a Reel of 10000)
Aantal stuks
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-stocknr. 888-3327
Fabrikantnummer28A0434-0A2
€ 0,706
Each (In a Pack of 50)
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0434 111Ω 277Ω 449Ω - - - Snap-On EMI Core, Split EMI Core 14.71 x 433mm 433mm - - 14.71mm EMI Suppression
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FabrikantMurata
€ 0,044
Each (On a Reel of 4000)
Aantal stuks
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