One with the same physical size, wire gauge and same number of turns should be functionally close enough

Thanks, I'll look into that!

agree ! Might help if you told us the motherboard make/model ;p

Why does it need to be replaced?

majestyk wrote on 2022-10-24, 05:40:

Why does it need to be replaced?

Maybe he mean a broken core, I think.

With some luck, the inductance tolerances in that particular application aren't too tight. Would guess it's power supply filtering given the size of the thing. You could try to reshape the coil and glue the core back together. Use the thinnest cyanoacrylate glue you can find, to minimize the "air gaps". Precision is key.

Otherwise, do as Sphere478 suggests 😀

Ydee wrote on 2022-10-24, 10:12:

majestyk wrote on 2022-10-24, 05:40:

Why does it need to be replaced?

Maybe he mean a broken core, I think.

o.k., now I see the crack at the bottom.

When it comes to ferrite materials, sometimes the colour stands for certain electromagnetic charakteristics.

It's an ASK ATX55C (pretty unknown).

Agree on the colour - should identify the material used - and on finding one with similar size and wire gauge.

Thanks all!

I saw the model name and thought wait a minute, I know someone recently struggling with that exact board model, I should link you the video ... haha

1 You can desolder the other still intact inductor and measure with Your LCR-T4. Btw I love my LCR-T4, such an underappreciated piece of gear for ~$12.
2 You can go geeky, measure switching frequency and plug numbers into https://fscdn.rohm.com/en/products/databook/a … ion_appli-e.pdf
3 You can eyeball it and just slap 20-40uH in there
4 you can leave it alone as its clearly working 😀

ahaha love that! Thanks for watching BTW!

My component tester can measure inductance? Amazing! Yes such an impressive tool for so little.

I like all the points, can probably do 1 and 2 just for fun! 😀 (and make a video about that! 😀 )

Thanks!

My LCR-T4 (or whatever clone I've got) does not measure that inductor - maybe too low in value? Using EEVBLOG method also yields no reading (1/capacitance).

I checked here http://www.nessengr.com/technical-data/toroid … and-calculator/ and input the data and I get 0.1288 micro-Henrys?

On another calculator I get 87 microHenry though.
https://coil32.net/online-calculators/ferrite … calculator.html

I can find a 1mm diameter wire on RS components which seems to match the 88uH figure I got from the second calculator.

https://uk.rs-online.com/web/p/leaded-inductors/1633637

Any feedback?

Thanks for your help!

It should be able to measure from 10uH up
you could try connecting both intact and cracked one in series and measuring that (inductance adds up), or find a bigger known value inductor and use it in same serial connection way
Would be interesting to see if/how much the crack influenced inductance of that inductor.

I read online of that trick. I'll see if I have another inductor somewhere.

Yes, it would be nice to know indeed!

Thanks!
Tony

tony359 wrote on 2022-10-23, 19:30:

I would like to replace a smashed inductor on a socket 7 motherboard, this is for CPU VCC2 if not mistaken. Would someone be able to help me selecting a suitable one?

Because of the colors (Yellow/White) and the sizes I think the inductor has an iron powder core "T50-26" μ0=75 . Although I can't help to find a suitable inductor.
Micrometals Iron Powder Cores for Power Conversion Catalog - Issue L 2007