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Questions tagged [ferrite-bead]

A ferrite bead is a passive electric component, which is commonly used for suppressing high frequency noise in electronic circuits.

A ferrite bead is a passive electric component, which is commonly used for suppressing high frequency noise in electronic circuits.

enter image description here
(a) Simplified circuit model
(b) Tyco Electronics BMB2A1000LN2 measured ZRX plot
source: Analog Devices article Ferrite Beads Demystified

150 questions
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Ferrite Beads Design

Currently learning about ferrite beads. I have noticed that on the data sheets they have graphs of impeadance vs frequency. to ensure you have the best ferrite for the job I assume you want to get the greatest impeadance at the frequency you are…
Stuart S
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Purpose of high resistance ferrite beads?

Sorry, if this is obvious or stupid, but what is the point of ferrite beads with more than \$Z\approx100\space\Omega\$ of impedance? I mainly see their application as serial filters in either power lines (impedance usually \$Z\approx10\space\Omega\$…
tobalt
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Ferrite beads for high currents

In the EVM datasheet schematic, two input beads and 2 output beads are used. In my application, I drive 56V 5A COB LED. Input voltage is 22-50V, so input current can be ~6-13A. I read on Internet, that beads saturate and lose their filtering…
Roman Simonyan
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Ferrite Beads - Maximum DC current and resistance

I'm building a PupDAC (http://www.diyforums.org/PupDAC) and am looking into two different Ferrite beads. The plan for the PupDAC calls for this Vishay/Dale model (link 1) while I'm looking into this Bourns model (link 2) which is cheaper. Both are…
user25603
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Value of Ferrite Bead

How do I deduce the value of the ferrite bead between pin 2 and 16 as shown in the schematic.
BlackHawk
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Using ferrite bead instead of inductor for differential-mode filter

At high frequencies sometimes ferrite beads are used instead of inductors as normal/differential-mode filters. I drew Figure 1 and Figure 2 below showing LC and ferrite bead C differential filters: Let’s assume we want to quantify the voltage…
cm64
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Amplifier buzz caused by new electric room heater, set to medium only!

My Marantz receiver has never had this problem before. I have installed a new replacement MVH heater with 3 output settings: low, med and high (just like original). Suddenly when this is on and set to Med the Marantz has a loud buzz. By adding…
Doug Kerr
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importance of ferrite bead impedance?

Would it be safe to replace a ferrite bead that had a rating of 47 ohm @ 100MHz 5A with one that is 70 Ohms @ 100MHz 6A? I can't seem to find an exact replacement. https://www.amigawiki.org/dnl/schematics/A4000_Rb.pdf - fb177 for example.
Oggie
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ferrite bead selection for GSM application

I am trying to get a better understanding of a good method for selecting ferrite beads from those available. I have a CLC filter, with 1uF x7r ceramics for each C, L being a ferrite bead in a 0805 package. Following this a LDO regulator that may…
user121354
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Leaded Ferrite bead good choice for winding my own coils?

I have never designed directly with a ferrite bead: I want to wind my own inductor coils, and these seems useful for the fact that it has a ferrite core and some hefty leads coming out. I'd wrap my magnetic coil around the core and then solder the…
user2913869
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Best way to filter VCC to Radio Micro

My project has two micros. One is an ESP8266 - WiFi radio and the other a general purpose micro. The power to the ESP needs to be clean. I initially looked at a pi filter using a ferrite bead but then found several articles that state the bead…
JHinkle
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How to select appropriate ferrite beads for power supply rails

I'm making a camera board using IMX225LQR image sensor. For this sensor you need 3.3V analog power supply and 1.8V, 1.2V digital power supplies. Also, the 1.8V power pins are close to the 3.3V analog pins. Thus I'd like to use ferrite bead to…
SD11
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Ferrite bead cases

I am migrating a design (RF) to a space grade/Hi rel design. My board has a lot of RFI or EMI filters. In my previous BOM they were of conventional dimensions (0603 and such). Now, I have to go for Hi Rel components. The component I selected belongs…
Board-Man
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