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. 177-6255
FabrikantnummerBLM41PG600SN1L
FabrikantMurata
€ 0,103
Each (On a Reel of 10000)
Aantal stuks
1806 - 60Ω - - - 6A Chip Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - General Electronics
RS-stocknr. 188-8665
FabrikantnummerBLM41PG600SN1L
FabrikantMurata
€ 0,182
Each (In a Pack of 10)
Aantal stuks
1806 (4516M) - 60Ω - - - 6A Chip Ferrite Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - EMI Suppression, Power Supplies
RS-stocknr. 888-3333
Fabrikantnummer28A0640-0A2
€ 0,823
Each (In a Pack of 50)
Aantal stuks
0640 105Ω 240Ω 390Ω - - - Cylindrical EMI Core 22.28 x 32.77 x 21.84mm 22.28mm 32.77mm 21.84mm - EMI Suppression
RS-stocknr. 125-3120
FabrikantnummerBLM41PG600SN1L
FabrikantMurata
€ 0,103
Each (On a Reel of 2500)
Aantal stuks
1806 (4516M) - 60Ω - - - 6A Chip Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - EMI Suppression, Power Supplies
RS-stocknr. 724-1508
FabrikantnummerBLM21BB600SN1D
FabrikantMurata
€ 0,072
Each (In a Pack of 25)
Aantal stuks
0805 (2012M) - 60Ω - - - 800mA Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, High Speed Signal Lines
RS-stocknr. 888-3364
Fabrikantnummer28A2026-0A2
€ 0,754
Each (In a Pack of 50)
Aantal stuks
2026 95Ω 270Ω 460Ω - - - Snap-On EMI Core, Split EMI Core 21 x 41.7 x 21mm 21mm 41.7mm 21mm - EMI Suppression
RS-stocknr. 144-9785
Fabrikantnummer742792651
FabrikantWurth Elektronik
€ 0,086
Each (On a Reel of 4000)
Aantal stuks
603 - 600Ω - - - 1A 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. 724-1337
FabrikantnummerBLM18EG601SN1D
FabrikantMurata
€ 0,086
Each (In a Pack of 25)
Aantal stuks
0603 (1608M) - 600Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS-stocknr. 747-4714
FabrikantnummerBLM18KG221SN1D
FabrikantMurata
€ 0,029
Each (In a Bag of 100)
Aantal stuks
0603 (1608M) - 220Ω - - - 2.2A 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-stocknr. 166-9870
FabrikantnummerBLM21PG600SN1D
FabrikantMurata
€ 0,018
Each (On a Reel of 4000)
Aantal stuks
0805 (2012M) - 60Ω - - - 3A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS-stocknr. 125-3148
FabrikantnummerBLM18EG601SN1D
FabrikantMurata
€ 0,027
Each (On a Reel of 4000)
Aantal stuks
0603 (1608M) - 600Ω - - - 500mA Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS-stocknr. 124-1835
Fabrikantnummer742792651
FabrikantWurth Elektronik
€ 0,148
Each (In a Pack of 50)
Aantal stuks
0603 (1608M) - 600Ω - - - 1A 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. 787-9995
Fabrikantnummer742792625
FabrikantWurth Elektronik
€ 0,157
Each (In a Bag of 10)
Aantal stuks
0603 (1608M) - 120Ω - - - 2A EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 669-4080
Fabrikantnummer742792063
FabrikantWurth Elektronik
€ 0,193
Each (In a Pack of 10)
Aantal stuks
0805 (2012M) - 60Ω - - - 3A EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS-stocknr. 163-3537
Fabrikantnummer74279208
FabrikantWurth Elektronik
€ 0,158
Each (On a Reel of 4000)
Aantal stuks
0805 (2012M) - 40Ω - - - 500mA EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS-stocknr. 741-3131
FabrikantnummerMMZ1608R301AT
FabrikantTDK
€ 0,029
Each (In a Bag of 100)
Aantal stuks
0603 (1608M) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS-stocknr. 144-9839
Fabrikantnummer74279262
FabrikantWurth Elektronik
€ 0,078
Each (On a Reel of 4000)
Aantal stuks
0603 - 120Ω - - - 500mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 669-4058
Fabrikantnummer74279208
FabrikantWurth Elektronik
€ 0,193
Each (In a Pack of 10)
Aantal stuks
0805 (2012M) - 40Ω - - - 500mA EMI Suppression 2 x 1.2 x 0.9mm 2mm 1.2mm 0.9mm - Suppression Components
RS-stocknr. 724-1328
FabrikantnummerBLM18EG221SN1D
FabrikantMurata
€ 0,09
Each (In a Pack of 25)
Aantal stuks
0603 (1608M) - 220Ω - - - 2A Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, GHz Band General Use (Low DC Resistance Type)
RS-stocknr. 166-9867
FabrikantnummerBLM21BB600SN1D
FabrikantMurata
€ 0,032
Each (On a Reel of 4000)
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