Identify a component - Page 1
Forum section: electronics / beginners

author: rylim
author_rank: Newbie
timestamp: July 25, 2016, 05:30:29 pm
content: Hi, I'm a newbie in this forum, and I'm seeking help to identify a component inside the red circle of picture below.

author: pyroesp
author_rank: Regular Contributor
timestamp: July 25, 2016, 06:25:47 pm
content: Looks like some sort of voltage regulator, you seem to have a 10µF 25V capacitor to the output (if I'm not mistaken).Is there any indication on the PCB of what the voltage could be ? Maybe following the trace can lead to some silkscreen text...I suppose you don't have or can't find the schematic of the board ?

author: Neilm
author_rank: Super Contributor
timestamp: July 25, 2016, 06:30:11 pm
content: Could be a PBSS5330X - a 30V PNP transistor. Data sheethttp://www.nxp.com/documents/data_sheet/PBSS5330X.pdf. Small P indicates made in Hong Kong

author: Signal32
author_rank: Frequent Contributor
timestamp: July 25, 2016, 06:36:07 pm
content: Quote from: Neilm on July 25, 2016, 06:30:11 pmSeems you are right, looks very similar tohttp://www.aliexpress.com/item/PBSS5330X/32532041468.html(2nd pic)

author: pyroesp
author_rank: Regular Contributor
timestamp: July 25, 2016, 06:40:56 pm
content: Quote from: Neilm on July 25, 2016, 06:30:11 pmI was wondering about that, nice to know.

author: rylim
author_rank: Newbie
timestamp: July 26, 2016, 05:15:03 am
content: Quote from: pyroesp on July 25, 2016, 06:25:47 pmUnfortunately I don't have the PCB schematic, and I believe the voltage is around 12VdcQuote from: Neilm on July 25, 2016, 06:30:11 pmI'm wondering how did you figure out it is a 30V PNP transistor? I have been googling for that component, as well as looking up many transistor coding books.

author: rylim
author_rank: Newbie
timestamp: July 26, 2016, 05:17:44 am
content: Quote from: Signal32 on July 25, 2016, 06:36:07 pmThanks for the time of posting the link.By the way, the transistor in the picture is P02, whereas mine is P06 and I'm wondering if it makes any different?

author: Signal32
author_rank: Frequent Contributor
timestamp: July 26, 2016, 08:02:42 am
content: Quote from: rylim on July 26, 2016, 05:17:44 amThe 2nd marking isn't mentioned by the datasheet. I'm thinking it's either a date code or serial number. So, no, yours is just part of a different batch.

author: Refrigerator
author_rank: Super Contributor
timestamp: July 26, 2016, 08:32:31 am
content: "Q9" on PCB next to the part means it's a transistor, now you can use a diode tester to test it or use that as reference point when looking for a replacement.Q or T means a transistor. U or IC means an integrated circuit, if this was a voltage regulator it would be marked that way.Edit: use this site ( or similar ) when looking for SMD parts :http://www.s-manuals.com/smd.

author: PA4TIM
author_rank: Super Contributor
timestamp: July 26, 2016, 10:18:06 am
content: These sites can help:http://www.s-manuals.com/smdhttp://www.systek.ru/marking.php?marking=4eEdit, I now see the link is already given.I have to do this almost every day and although I'm getting good at it, it still is no fun.If you google it is handy to add : smd marking to the search parameters. Also the type of package can help and sometimes datasheet.fi something like : AH sot-89 smd marking datasheet And sometimes it helps to add things like mosfet.Could be a 2SD2413 that has marking 1S for sot-89 then 06 could be the years code ?Besides that I use a pdf from a book that is over 2000 pages and states all smd markings. It is a commercial yearly publication from Turuta. Called the smd-codes databook.There also is a free pdf named the smd codebook

author: djQUAN
author_rank: Frequent Contributor
timestamp: July 26, 2016, 12:40:04 pm
content: Quote from: Refrigerator on July 26, 2016, 08:32:31 amNot going to work in this case as the part is blown and cracked, split in half

author: Neilm
author_rank: Super Contributor
timestamp: July 26, 2016, 06:24:43 pm
content: Quote from: rylim on July 26, 2016, 05:15:03 amGoogled " SOT-89 marking p1S". Quick sort through the results concentrating on manufacturer sites

author: rylim
author_rank: Newbie
timestamp: July 29, 2016, 08:53:58 pm
content: Many thanks to all of you. I have ordered the component (PBSS5330X), and hope that the label of second line is the date of production