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. 792-6268
FabrikantnummerBLM18HE601SN1D
FabrikantMurata
€ 0,115
Each (In a Bag of 25)
Aantal stuks
0603 (1608M) - 600Ω - - - 800mA 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-stocknr. 669-4092
Fabrikantnummer742792031
FabrikantWurth Elektronik
€ 0,222
Each (In a Pack of 10)
Aantal stuks
0805 (2012M) - 300Ω - - - 3A EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS-stocknr. 124-1844
Fabrikantnummer742792662
FabrikantWurth Elektronik
€ 0,137
Each (In a Pack of 100)
Aantal stuks
0603 (1608M) - 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
RS-stocknr. 144-9791
Fabrikantnummer742792662
FabrikantWurth Elektronik
€ 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
RS-stocknr. 166-9709
FabrikantnummerBLM21BD222SN1L
FabrikantMurata
€ 136,46
1 Reel of 3000
Reel(s)
0805 (2012M) - - - - - - Chip Ferrite Bead 2 x 1.25 x 1.25mm 2mm 1.25mm 1.25mm - EMI Suppression Filter, High Speed Signal Lines
RS-stocknr. 202-3667
FabrikantnummerBLM21BD222SN1L
FabrikantMurata
€ 0,098
Each (In a Pack of 20)
Aantal stuks
0805 (2012M) - - - - - - Chip Ferrite Bead 2 x 1.25 x 1.25mm 2mm 1.25mm 1.25mm - EMI Suppression Filter, High Speed Signal Lines
RS-stocknr. 669-3992
Fabrikantnummer742792653
FabrikantWurth Elektronik
€ 0,157
Each (In a Pack of 10)
Aantal stuks
0603 (1608M) - 600Ω - - - 300mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 888-3327
Fabrikantnummer28A0434-0A2
€ 0,706
Each (In a Pack of 50)
Aantal stuks
0434 111Ω 277Ω 449Ω - - - Snap-On EMI Core, Split EMI Core 14.71 x 433mm 433mm - - 14.71mm EMI Suppression
RS-stocknr. 144-9837
Fabrikantnummer742792653
FabrikantWurth Elektronik
€ 313,60
1 Reel of 4000
Reel(s)
0603 - 600Ω - - - 300mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 167-4982
FabrikantnummerBLM18HE601SN1D
FabrikantMurata
€ 0,044
Each (On a Reel of 4000)
Aantal stuks
0603 (1608M) - 600Ω - - - 800mA 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-stocknr. 124-1837
Fabrikantnummer742792096
FabrikantWurth Elektronik
€ 0,21
Each (In a Pack of 50)
Aantal stuks
0805 (2012M) - 1000Ω - - - 1A 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-stocknr. 177-6254
FabrikantnummerBLM41PG750SN1L
FabrikantMurata
€ 0,076
Each (On a Reel of 4000)
Aantal stuks
1806 - 75Ω - - - 3.5A Filter 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - EMI Suppression, Power Line
RS-stocknr. 166-9827
FabrikantnummerBLM31PG601SN1L
FabrikantMurata
€ 0,082
Each (On a Reel of 3000)
Aantal stuks
1206 (3216M) - 600Ω - - - 1.5A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Power Supplies
RS-stocknr. 144-9788
Fabrikantnummer742792040
FabrikantWurth Elektronik
€ 0,129
Each (On a Reel of 4000)
Aantal stuks
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-stocknr. 144-9786
Fabrikantnummer742792096
FabrikantWurth Elektronik
€ 563,20
1 Reel of 4000
Reel(s)
805 - 1000Ω - - - 1A 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-stocknr. 188-8659
FabrikantnummerBLM41PG750SN1L
FabrikantMurata
€ 0,186
Each (In a Pack of 10)
Aantal stuks
1806 (4516M) - 75Ω - - - 3.5A Chip Ferrite Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Power Supplies
RS-stocknr. 124-1839
Fabrikantnummer742792040
FabrikantWurth Elektronik
€ 0,186
Each (In a Pack of 50)
Aantal stuks
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-stocknr. 125-3119
FabrikantnummerBLM41PG750SN1L
FabrikantMurata
€ 0,098
Each (On a Reel of 2500)
Aantal stuks
1806 (4516M) - 75Ω - - - 3.5A Chip Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Power Supplies
RS-stocknr. 724-1582
FabrikantnummerBLM31PG601SN1L
FabrikantMurata
€ 0,157
Each (In a Pack of 25)
Aantal stuks
1206 (3216M) - 600Ω - - - 1.5A Chip Ferrite Bead 3.2 x 1.6 x 1.1mm 3.2mm 1.6mm 1.1mm - Power Supplies
RS-stocknr. 230-3828
FabrikantnummerBLM21BD601SN1D
FabrikantMurata
€ 0,079
Each (In a Pack of 20)
Aantal stuks
0805 (2012M) - 600Ω - - - 200mA Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, High Speed Signal Lines
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