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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Description Price 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 Stock No. 888-3327
Mfr. Part No.28A0434-0A2
SGD1.081
Each (In a Pack of 50)
units
0434 111Ω 277Ω 449Ω - - - Snap-On EMI Core, Split EMI Core 14.71 x 433mm 433mm - - 14.71mm EMI Suppression
RS Stock No. 888-3553
Mfr. Part No.HFA150068-0A2
SGD3.28
Each (In a Pack of 10)
units
150068 - - 275Ω - - Snap-On EMI Core, Split EMI Core 21 x 41.7 x 21mm 21mm 41.7mm 21mm - EMI Suppression
RS Stock No. 888-3339
Mfr. Part No.28A0593-0A2
SGD1.044
Each (In a Pack of 50)
units
0593 186Ω 407Ω 575Ω - - - Snap-On EMI Core, Split EMI Core 18.75 x 52.91mm 52.91mm - - 18.75mm EMI Suppression
RS Stock No. 786-5025
Mfr. Part No.MMZ1608S400AT
BrandTDK
SGD0.036
Each (In a Bag of 100)
units
0603 (1608M) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 888-3355
Mfr. Part No.28A2025-0A2
SGD0.743
Each (In a Pack of 50)
units
2025 130Ω 320Ω 510Ω - - - Snap-On EMI Core, Split EMI Core 18.15 x 32.5 x 18.9mm 18.15mm 32.5mm 18.9mm - EMI Suppression
RS Stock No. 161-8051
Mfr. Part No.BLM18PG600SN1D
BrandMurata
SGD76.39
1 Reel of 4000
Reel(s)
0603 (1608M) - 60Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, Power Supplies
RS Stock No. 724-1429
Mfr. Part No.BLM18PG600SN1D
BrandMurata
SGD0.07
Each (In a Pack of 25)
units
0603 (1608M) - 60Ω - - - 500mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, Power Supplies
RS Stock No. 888-3342
Mfr. Part No.28A0807-0A2
SGD1.556
Each (In a Pack of 50)
units
0807 160Ω 348Ω 514Ω - - - Snap-On EMI Core, Split EMI Core 24.82 x 55.91mm 55.91mm - - 24.82mm EMI Suppression
RS Stock No. 888-3106
Mfr. Part No.HR2220V801R-10
SGD1.47
Each (In a Pack of 50)
units
2220 (5650M) 150Ω 800Ω - - 75Ω 8A Chip Bead 5.59 x 5.08 x 3.61mm 5.59mm 5.08mm 3.61mm - Automotive, DSC, Energy and Utilities, General Electronics, Laptop, LCD-TV, Networking Devices, PC, Portable Devices etc., Security
RS Stock No. 724-1309
Mfr. Part No.BLM18BB121SN1D
BrandMurata
SGD0.06
Each (In a Pack of 25)
units
0603 (1608M) - 120Ω - - - 550mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, High Speed Signal Lines
RS Stock No. 741-3191
Mfr. Part No.MPZ2012S331AT
BrandTDK
SGD0.069
Each (In a Bag of 100)
units
0805 (2012M) - - - - - - - 2 x 1.25 x 0.85mm 2mm 1.25mm 0.85mm - -
RS Stock No. 144-9791
Mfr. Part No.742792662
SGD542.40
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 Stock No. 144-9788
Mfr. Part No.742792040
SGD0.199
Each (On a Reel of 4000)
units
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 Stock No. 124-1839
Mfr. Part No.742792040
SGD0.308
Each (In a Pack of 50)
units
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 Stock No. 724-1299
Mfr. Part No.BLM18AG601SN1D
BrandMurata
SGD0.058
Each (In a Pack of 25)
units
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 Stock No. 172-9972
Mfr. Part No.2944666651
BrandFair-Rite
SGD0.401
Each (In a Box of 200)
units
Radial - 600Ω - - - - Bead 6 (Dia.) x 10mm 10mm - - 6mm EMI Suppression
RS Stock No. 888-3351
Mfr. Part No.28A2025-0A0
SGD1.007
Each (In a Pack of 50)
units
2025 130Ω 320Ω 510Ω - - - Cylindrical EMI Core 18.15 x 32.5 x 18.9mm 18.15mm 32.5mm 18.9mm - EMI Suppression
RS Stock No. 124-1844
Mfr. Part No.742792662
SGD0.232
Each (In a Pack of 100)
units
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 Stock No. 604-1631
Mfr. Part No.MMZ1608R300AT
BrandTDK
SGD0.064
Each (In a Pack of 10)
units
0603 (1608M) - - - - - - Chip Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - Signal Line
RS Stock No. 166-9844
Mfr. Part No.BLM18BB121SN1D
BrandMurata
SGD0.03
Each (On a Reel of 4000)
units
0603 (1608M) - 120Ω - - - 550mA Chip Ferrite Bead 1.6 x 0.8 x 0.8mm 1.6mm 0.8mm 0.8mm - EMI Suppression Filter, High Speed Signal Lines
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