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

DVDs

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. 124-1844
Fabrikantnummer742792662
FabrikantWurth Elektronik
€ 0,139
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. 669-3992
Fabrikantnummer742792653
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€ 0,157
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0603 (1608M) - 600Ω - - - 300mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
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FabrikantnummerMPZ2012S331AT
FabrikantTDK
€ 0,039
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Aantal stuks
0805 (2012M) - - - - - - - 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - -
RS-stocknr. 167-4982
FabrikantnummerBLM18HE601SN1D
FabrikantMurata
€ 0,025
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. 144-9837
Fabrikantnummer742792653
FabrikantWurth Elektronik
€ 0,078
Each (On a Reel of 4000)
Aantal stuks
0603 - 600Ω - - - 300mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 166-9558
FabrikantnummerBLM15EG221SN1D
FabrikantMurata
€ 0,037
Each (On a Reel of 10000)
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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. 792-6268
FabrikantnummerBLM18HE601SN1D
FabrikantMurata
€ 0,08
Each (In a Bag of 25)
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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. 166-9709
FabrikantnummerBLM21BD222SN1L
FabrikantMurata
€ 0,048
Each (On a Reel of 3000)
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. 144-9845
Fabrikantnummer742792031
FabrikantWurth Elektronik
€ 0,114
Each (On a Reel of 4000)
Aantal stuks
0805 - 300Ω - - - 3A EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS-stocknr. 202-3667
FabrikantnummerBLM21BD222SN1L
FabrikantMurata
€ 0,134
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0805 (2012M) - - - - - - Chip Ferrite Bead 2 x 1.25 x 1.25mm 2mm 1.25mm 1.25mm - EMI Suppression Filter, High Speed Signal Lines
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FabrikantMurata
€ 0,074
Each (On a Reel of 3000)
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RS-stocknr. 177-6254
FabrikantnummerBLM41PG750SN1L
FabrikantMurata
€ 0,101
Each (On a Reel of 4000)
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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. 124-1837
Fabrikantnummer742792096
FabrikantWurth Elektronik
€ 0,191
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. 124-1839
Fabrikantnummer742792040
FabrikantWurth Elektronik
€ 0,193
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. 144-9788
Fabrikantnummer742792040
FabrikantWurth Elektronik
€ 0,114
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
€ 0,061
Each (On a Reel of 4000)
Aantal stuks
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. 125-3119
FabrikantnummerBLM41PG750SN1L
FabrikantMurata
€ 0,101
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
€ 0,15
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. 188-8659
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€ 0,26
Each (In a Pack of 10)
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