Author Topic: SMD idenfication  (Read 1353 times)

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Offline ajdgilbert

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SMD idenfication
« on: January 19, 2018, 12:37:51 pm »
Hello everyone,

I have an old sff PC on which the front panel USB header does not work, I have found that a SMD on the motherboard has burnt out but I have no idea of what it is and where to get one, google is not my friend today. Hoping someone can help as this will actually be my first attempt at a motherboard repair!

See attached pic, its a 269S apparently.

Thank you
 

Offline blueskull

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Re: SMD idenfication
« Reply #1 on: January 19, 2018, 12:40:09 pm »
A fuse, more likely a polyfuse.
 

Offline zvonex66x

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Re: SMD idenfication
« Reply #2 on: January 19, 2018, 04:30:27 pm »
it's the PTC resetablle fuse
 

Offline soubitos

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Re: SMD idenfication
« Reply #3 on: January 19, 2018, 05:15:11 pm »
What was said above... actually, another same part is to the left of the connector
 

Offline ajdgilbert

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Re: SMD idenfication
« Reply #4 on: January 19, 2018, 06:12:50 pm »
Thanks guys, there are in fact quite a few of these on this particular board.

Unfortunately I still cannot find any like this for sale, any ideas on what I could use as an alternative?
 

Offline soubitos

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Re: SMD idenfication
« Reply #5 on: January 19, 2018, 06:58:06 pm »
Unless you know its rated amperes it is next to impossible to look at a replacement... then you need its dimensions.
An example of what is available http://www.littelfuse.com/~/media/electronics_technical/application_notes/resettable_ptcs/ec327-e_polyfuse_ptc.pdf

Also, is it 269S or S692 ?
 

Online Neomys Sapiens

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Re: SMD idenfication
« Reply #6 on: January 20, 2018, 12:38:20 am »
Unless you know its rated amperes it is next to impossible to look at a replacement... then you need its dimensions.
An example of what is available http://www.littelfuse.com/~/media/electronics_technical/application_notes/resettable_ptcs/ec327-e_polyfuse_ptc.pdf

Also, is it 269S or S692 ?
I would also say it reads as S692!
 

Offline zvonex66x

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Re: SMD idenfication
« Reply #7 on: January 21, 2018, 06:33:14 pm »
It's BOURNS Multifuse MF-MSMF260 2.6A, 9V
 

Offline soubitos

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Re: SMD idenfication
« Reply #8 on: January 21, 2018, 07:19:19 pm »
It's BOURNS Multifuse MF-MSMF260 2.6A, 9V

So, 269S is ... 2,6A 9V!
Nice coding!
Good shot zvonex66x
 

Online Nusa

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Re: SMD idenfication
« Reply #9 on: January 21, 2018, 07:34:44 pm »
It's BOURNS Multifuse MF-MSMF260 2.6A, 9V

So, 269S is ... 2,6A 9V!
Nice coding!
Good shot zvonex66x

Except that MF-MSMF260 is a 6V part, so that decoding doesn't seem quite right.
 

Offline soubitos

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Re: SMD idenfication
« Reply #10 on: January 21, 2018, 07:45:16 pm »
It's BOURNS Multifuse MF-MSMF260 2.6A, 9V

So, 269S is ... 2,6A 9V!
Nice coding!
Good shot zvonex66x

Except that MF-MSMF260 is a 6V part, so that decoding doesn't seem quite right.

LOL.. back to ground level!
I am really curious if anybody nails this one! google doesnt show anything of the short
 

Offline zvonex66x

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Re: SMD idenfication
« Reply #11 on: January 21, 2018, 08:31:47 pm »
It's 260 series, but the last digit 26(9)s telling you that is rated for 9V
 

Online Nusa

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Re: SMD idenfication
« Reply #12 on: January 21, 2018, 08:50:16 pm »
It's 260 series, but the last digit 26(9)s telling you that is rated for 9V
https://www.bourns.com/pdfs/mfmsmf.pdf

MF-MSMF is the series. MF-MSMF260 looks to be a specific part, rated at 6V.

The last two digits on MS-MSMF parts are a date code. So if we assume 9S is a date code, we're happy again.
 

Offline zvonex66x

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Re: SMD idenfication
« Reply #13 on: January 21, 2018, 09:03:45 pm »
Ok, then you can see those two capacitors, and you can conclude rated voltage for this pptc fuse
 

Offline ajdgilbert

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Re: SMD idenfication
« Reply #14 on: January 22, 2018, 07:41:30 pm »
Thanks for the input everyone, I think I'm going to go with zvonex66x on this one.

I'll post the result!
 


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