Electronics > Repair

Need help to identify burned smd component

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Alex_ulli:

--- Quote from: pcprogrammer on November 01, 2024, 07:07:17 am ---And one that can handle a lot more current. The STL56N3LLH5 can handle 56A. This does not mean that this current is actually flowing, but they did choose these MOSFET's for a reason.

The Vishay SI4497DY-T1-GE3 might be a better match. https://www.vishay.com/docs/65748/si4497dy.pdf

--- End quote ---

Thanks, ordered them also.

Alex_ulli:

--- Quote from: fzabkar on October 31, 2024, 07:28:51 pm ---STL56N3LLH5

https://www.st.com/resource/en/datasheet/stl56n3llh5.pdf

--- End quote ---

Yeah, and can somebody advise where I can buy them? I found on ebay from 1 seller for 10$ each, I need 2 and it seems like too much for an experiment.

first 20 links in google - they are not sellers actually, I even made an order here https://www.newark.com/stmicroelectronics/stl56n3llh5/mosfet-n-ch-30v-56a-150deg-c-62/dp/69AH2760?CMP=e-email-sys-orderack-GLB, but it turned out that they don't have item in stock, and it can be shipped only next year;)

Sensorcat:

--- Quote from: Alex_ulli on November 01, 2024, 03:26:39 pm ---Yeah, and can somebody advise where I can buy them? I found on ebay from 1 seller for 10$ each, I need 2 and it seems like too much for an experiment.

--- End quote ---
https://www.digikey.com/en/products/detail/stmicroelectronics/STL56N3LLH5/2756447?s=N4IgTCBcDaIMoBUAyBWAbAOQMxKQCRRAF0BfIA


--- Quote from: Alex_ulli on November 01, 2024, 03:26:39 pm ---first 20 links in google - they are not sellers actually, ...

--- End quote ---
Google search is not ideal if you already know manufacturer and part number, better go directly to a distributor, like in the example link above. Using an industry distributor has the advantage that you can be quite sure to get the genuine part, unlike ebay and other platforms where anybody can set up a small business to sell anything.

Alex_ulli:

--- Quote from: Sensorcat on November 01, 2024, 09:42:23 pm ---https://www.digikey.com/en/products/detail/stmicroelectronics/STL56N3LLH5/2756447?s=N4IgTCBcDaIMoBUAyBWAbAOQMxKQCRRAF0BfIA

Google search is not ideal if you already know manufacturer and part number, better go directly to a distributor, like in the example link above. Using an industry distributor has the advantage that you can be quite sure to get the genuine part, unlike ebay and other platforms where anybody can set up a small business to sell anything.

--- End quote ---

Yes, thank you. I already placed an order here. Earlier today, I had some trouble with them; for some reason, they were canceling my orders. But I resolved it over the phone. I was hoping there was a faster way, than a week of expectation.

Alex_ulli:
Good news, guys!
Thanks everyone for help one more time!

So, I received first ordered item - IRF7404 Mosfet P-Channel 20V 6.7A. Yes, I understand that 20V is too close to 18, and I will replace this Mosfet after I will receive the recommended one. I just wanted to test without full load, and I assumed it should work. And it did!

Now, I can switch on my machine and everything seems to be working, except, of course, one bottom motor, which I didn't connect.

What I've noticed is that in this circuit for the bottom motor - something is heating very fast, in one second after switching on. It seems like this part, that I circled on the photo. What might it be? Do you think it is because of the burned components in this circuit? Don't want to have new components to burn again.

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