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. 724-1532
FabrikantnummerBLM21PG221SN1D
FabrikantMurata
€ 0,059
Each (In a Pack of 25)
Aantal stuks
0805 (2012M) - 220Ω - - - 2A Chip Ferrite Bead 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - EMI Suppression Filter, Power Supplies
RS-stocknr. 144-9802
Fabrikantnummer742792042
FabrikantWurth Elektronik
€ 608,61
1 Reel of 4000
Reel(s)
805 - 600Ω - - - 200mA 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. 104-8549
FabrikantnummerBLM41PG600SH1L
FabrikantMurata
€ 0,191
Each (In a Pack of 10)
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1806 (4516M) - 60Ω - - - 6A Chip Bead 4.5 x 1.6 x 1.6mm 4.5mm 1.6mm 1.6mm - Automotive, Powertrain, Safety
RS-stocknr. 166-9764
FabrikantnummerBLM21BD601SN1D
FabrikantMurata
€ 127,15
1 Reel of 4000
Reel(s)
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
RS-stocknr. 888-3507
Fabrikantnummer28C0236-0EW-10
€ 0,314
Each (In a Pack of 100)
Aantal stuks
Axial 620Ω 998Ω - - 205Ω 5A Ferrite Bead on Wire 6 (Dia.) x 10mm 10mm - - 6mm Automotive, EMI Suppression, LCD-TV, Power Line, Telecom, Test Equipment
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
RS-stocknr. 669-4002
Fabrikantnummer74279263
FabrikantWurth Elektronik
€ 0,176
Each (In a Pack of 10)
Aantal stuks
0603 (1608M) - 220Ω - - - 500mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 125-3159
FabrikantnummerBL01RN1A1D2B
FabrikantMurata
€ 0,064
Each (On a Reel of 500)
Aantal stuks
Axial - - - - - 7A EMI Suppression 3.6 (Dia.) x 5mm 5mm - 5mm 3.6mm -
RS-stocknr. 144-9838
Fabrikantnummer74279263
FabrikantWurth Elektronik
€ 523,49
1 Reel of 4000
Reel(s)
0603 - 220Ω - - - 500mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 888-3257
FabrikantnummerMI0805K400R-10
€ 0,052
Each (In a Pack of 500)
Aantal stuks
0805 (2012M) 19Ω 40Ω - - 63Ω 1.5A Chip Bead 2 x 1.25 x 0.9mm 2mm 1.25mm 0.9mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS-stocknr. 724-1605
FabrikantnummerBL01RN1A1D2B
FabrikantMurata
€ 0,108
Each (In a Pack of 25)
Aantal stuks
Axial - - - - - 7A EMI Suppression 3.6 (Dia.) x 5mm 5mm - 5mm 3.6mm -
RS-stocknr. 239-589
FabrikantnummerBL01RN1A1F1J
FabrikantMurata
€ 0,104
Each (In a Pack of 10)
Aantal stuks
Axial - - - - - 7A Bead 3.6 (Dia.) x 5mm 5mm - - 3.6mm General Electronics
RS-stocknr. 163-3546
Fabrikantnummer7427923
FabrikantWurth Elektronik
€ 319,20
1 Reel of 2000
Reel(s)
1210 (3225M) - 90Ω - - - 400mA EMI Suppression 3.2 x 2.5 x 1.3mm 3.2mm 2.5mm 1.3mm - Suppression Components
RS-stocknr. 125-3148
FabrikantnummerBLM18EG601SN1D
FabrikantMurata
€ 210,45
1 Reel of 4000
Reel(s)
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. 669-4147
Fabrikantnummer7427923
FabrikantWurth Elektronik
€ 0,378
Each (In a Pack of 10)
Aantal stuks
1210 (3225M) - 90Ω - - - 400mA EMI Suppression 3.2 x 2.5 x 1.3mm 3.2mm 2.5mm 1.3mm - Suppression Components
RS-stocknr. 888-3503
Fabrikantnummer28C0236-0BW-10
€ 0,295
Each (In a Pack of 100)
Aantal stuks
Axial 500Ω 835Ω - - 220Ω 5A Ferrite Bead on Wire 6 (Dia.) x 10mm 10mm - - 6mm Automotive, EMI Suppression, LCD-TV, Power Line, Telecom, Test Equipment
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. 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. 144-9839
Fabrikantnummer74279262
FabrikantWurth Elektronik
€ 313,60
1 Reel of 4000
Reel(s)
0603 - 120Ω - - - 500mA EMI Suppression 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Suppression Components
RS-stocknr. 888-3333
Fabrikantnummer28A0640-0A2
€ 0,823
Each (In a Pack of 50)
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0640 105Ω 240Ω 390Ω - - - Cylindrical EMI Core 22.28 x 32.77 x 21.84mm 22.28mm 32.77mm 21.84mm - EMI Suppression
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