Transistor from USB HUB

delir66

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Join Date: Aug 2022

Posts: 7

Country: Spain
#1

Transistor from USB HUB

10-14-2022, 04:21 PM

Hi all!
Yesterday my usb hub started smoking after I pluged in a pad controller.... It has performed great for a couple of years.
There is a burnt smd transistor, but the code is unreadable. It's a Sot-23 package. I read somewhere that smd transistors starting with "A" are MOSFET.

Don't know if P or N.
5v from usb goes straight to the single pin side, which might be Drain...
Only data i have is package, usb operation voltage.
No max current draw on the label.... it has 7 usb ports.

Don't know about transistor specs. Any advise on a possible substitute?

Thanks.
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lotas

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Join Date: Jan 2016

Posts: 4459

Country: Russia
#2

10-14-2022, 06:21 PM

Re: Transistor from USB HUB

A79T (AO3407) - P Ch.
A19T (AO3401) - P Ch.
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delir66

New Member

Join Date: Aug 2022

Posts: 7

Country: Spain
#3

10-15-2022, 12:40 AM

Re: Transistor from USB HUB

Hi Iotas!
Thanks so much for this.
Will let know how everything went

Best!
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delir66

New Member

Join Date: Aug 2022

Posts: 7

Country: Spain
#4

11-12-2022, 03:39 AM

Re: Transistor from USB HUB

Hi Iotas. So I replaced the transistor and everything working again.
Thanks a lot for your help!
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Transistor from USB HUB

Transistor from USB HUB

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