Questions tagged [ferrite]

Question 1

I remember in the early 2000s, ferrite cores seemed to be all over. They were on the Playstation conttoller's cable, on USB cables, TVs would come with clip-on ferrite to put on your cables, it seemed ...

Question 2

I am driving passive LEDs (24 V, 1 A) through two transistors activated by a ~10 kHz PWM signal. The power goes through a shielded cable from the PCB to the LED module. My wider setup should be CE-...

Question 3

I seem to have confused the concepts of beads and chokes. Bead: Operates as an R due to LC resonance, causing heat loss and acting as a filter (hysteresis loss/eddy current loss). Choke: Generates ...

Question 4

I've had some electrical issues in my home over the last few years from nearby lightning strikes. I first focused on voltage protection devices (SPDs), but this didn't really help at all. Then I ...

Question 5

Might sound like a silly question but I was reading on transformers: What causes ferrite cores to be less suitable for transforming voltages at low frequencies (say 50 Hz) compared to iron cores? And ...

Question 6

I am calculating inductors for buck circuits, I found this article that is what I want, but is the formula for calculating Emin and Ecore appropriate, I asked ChatGPT and it said Ecore is wrong, I use ...

Question 7

I been trying to make a LC circuit for mw band or sw band for now I only have a 3-18 pF trimmer capacitor and this small ferrite rod. What gauge of wire and how many turns would I need for LC circuit ...

Question 8

I am installing some equipment and the manufacturer instructs to loop the communications wire several times on a ferrite core, problem is we are using a slightly different communications wire where ...

Question 9

I designed an inductor using a PQ2625 ferrite core. I don’t want the core to go into saturation during operation, so I determined a minimum required number of turns. However, this number of turns is ...

Question 10

I have some old 300 ohm to 75 ohm baluns, probably from the 1970s: What is the expected cutoff frequency (-3dB loss) for old (1970s) and modern (2020s) baluns of this form? What loss is expected for ...

Question 11

What is the purpose of these pieces of coax woven through a ferrite bead? In this case I am talking specifically for use within RF-amplifiers. I have seen them before, both before and after power ...

Question 12

I have been measuring a CM choke intended to be installed on DC busbars and I am seeing something that I cannot quite understand. I expected a CM choke to be inductive in this range, but just above ...

Question 13

I want to calculate the losses of a ferrite core. I don't want to rely on TDK limited charts and numbers. Here Magnetics INC has a calculation with constant numbers which is very useful I am looking ...

Question 14

During an EMC seminar (by Würth, I believe) some years ago, I remember learning that if you are going to put multiple ferrite clamps after each other on a cable, they should be separated by some ...

Question 15

We use ferrite beads with BK2125LM252-T code in projects. In the datasheet it says 200 mA rated current. but we draw a current between 2-3 A from the line to which this bead is connected. How does ...

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Questions tagged [ferrite]

Why are ferrite cores on cables less common in consumer electronics?

PWM controlled load: EMI best practices

Bead vs choke characteristics

ferrite core in common mode configuration on AC mains - does ground wire also going through the core have any effect?

Limitations of ferrite cores at low frequencies

Ferrite core calculation formula for buck circuit

How much inductance and turns would I need for a LC circuit for mw band?

Can I change a ferrite core to a slightly larger one without problems?

How should I sand down the inductor core to achieve the desired air gap?

How effective are my old TV baluns?

Coax through ferrite in RF amplifier

Capacitive behavior of a CM choke

Ferrite Core Losses calculate

Does the spacing of ferrite clamps affect their performance?

How should the current value be when choosing a ferrite bead

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