SMD idenfication - Page 1
Forum section: electronics / beginners

author: ajdgilbert
author_rank: Newbie
timestamp: January 19, 2018, 12:37:51 pm
content: 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

author: zvonex66x
author_rank: Contributor
timestamp: January 19, 2018, 04:30:27 pm
content: it's the PTC resetablle fuse

author: soubitos
author_rank: Frequent Contributor
timestamp: January 19, 2018, 05:15:11 pm
content: What was said above... actually, another same part is to the left of the connector

author: ajdgilbert
author_rank: Newbie
timestamp: January 19, 2018, 06:12:50 pm
content: 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?

author: soubitos
author_rank: Frequent Contributor
timestamp: January 19, 2018, 06:58:06 pm
content: 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 availablehttp://www.littelfuse.com/~/media/electronics_technical/application_notes/resettable_ptcs/ec327-e_polyfuse_ptc.pdfAlso, is it 269S or S692 ?

author: Neomys Sapiens
author_rank: Super Contributor
timestamp: January 20, 2018, 12:38:20 am
content: Quote from: soubitos on January 19, 2018, 06:58:06 pmI would also say it reads as S692!

author: zvonex66x
author_rank: Contributor
timestamp: January 21, 2018, 06:33:14 pm
content: It's BOURNS Multifuse MF-MSMF260 2.6A, 9V

author: soubitos
author_rank: Frequent Contributor
timestamp: January 21, 2018, 07:19:19 pm
content: Quote from: zvonex66x on January 21, 2018, 06:33:14 pmSo, 269S is ... 2,6A 9V!Nice coding!Good shot zvonex66x

author: Nusa
author_rank: Super Contributor
timestamp: January 21, 2018, 07:34:44 pm
content: Quote from: soubitos on January 21, 2018, 07:19:19 pmExcept that MF-MSMF260 is a 6V part, so that decoding doesn't seem quite right.

author: soubitos
author_rank: Frequent Contributor
timestamp: January 21, 2018, 07:45:16 pm
content: Quote from: Nusa on January 21, 2018, 07:34:44 pmLOL.. back to ground level!I am really curious if anybody nails this one! google doesnt show anything of the short

author: zvonex66x
author_rank: Contributor
timestamp: January 21, 2018, 08:31:47 pm
content: It's 260 series, but the last digit 26(9)s telling you that is rated for 9V

author: Nusa
author_rank: Super Contributor
timestamp: January 21, 2018, 08:50:16 pm
content: Quote from: zvonex66x on January 21, 2018, 08:31:47 pmhttps://www.bourns.com/pdfs/mfmsmf.pdfMF-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.

author: zvonex66x
author_rank: Contributor
timestamp: January 21, 2018, 09:03:45 pm
content: Ok, then you can see those two capacitors, and you can conclude rated voltage for this pptc fuse

author: ajdgilbert
author_rank: Newbie
timestamp: January 22, 2018, 07:41:30 pm
content: Thanks for the input everyone, I think I'm going to go with zvonex66x on this one.I'll post the result!