Component identification & spec sheet - Page 1
Forum section: electronics / beginners

author: KILLSWITCH
author_rank: Contributor
timestamp: April 26, 2018, 02:26:22 am
content: I have been pulling parts from old equipment and running into components with no hits on a search engine.It seems to me there is no standard (or I don't understand the standard) for part numbers.Some parts have multiple lines of letters and/or numbers.Some have no manufacturer markings leaving me guessing where to find the spec sheet. Do some parts simply have no spec sheet available?Is there some part number standard I should know?Examples:

author: KILLSWITCH
author_rank: Contributor
timestamp: April 26, 2018, 02:27:42 am
content: Example 2:

author: KILLSWITCH
author_rank: Contributor
timestamp: April 26, 2018, 02:28:57 am
content: Example 3:

author: RomDump
author_rank: Regular Contributor
timestamp: April 26, 2018, 03:44:50 am
content: Quote from: KILLSWITCH on April 26, 2018, 02:26:22 amhttps://www.mouser.com/ds/2/149/SS8050-117753.pdf

author: RomDump
author_rank: Regular Contributor
timestamp: April 26, 2018, 03:49:41 am
content: Quote from: KILLSWITCH on April 26, 2018, 02:28:57 amhttp://store.alhekma4u.com/content/Diodes/uPC574_u574.pdf

author: Jwillis
author_rank: Super Contributor
timestamp: April 26, 2018, 04:53:06 am
content: Can't see what kind of package the second picture is.

author: GerryBags
author_rank: Frequent Contributor
timestamp: April 26, 2018, 04:53:24 am
content: Example 1 is a 2N8050, 2 Amps, 800 Volts N-CHANNEL POWER MOSFEThttp://www.alldatasheet.com/view_datasheet.jsp?Searchword=2N8050The 2N stands for 2 p-n junctions, you'll notice diodes are 1Nxxxx, and as it's obviously a three terminal device many manufacturers leave off that part and just have the rest of the number. You'll find the same thing with 2SC prefixed transistors, like the 2SC741, which will just have the 741 on it.

author: KILLSWITCH
author_rank: Contributor
timestamp: April 26, 2018, 03:07:11 pm
content: Quote from: GerryBags on April 26, 2018, 04:53:24 amVery useful information, thank you.*you may have mistakenly linked to the 2n80*Quote from: RomDump on April 26, 2018, 03:44:50 amThis illustrates the point I was trying to get at. How do you know what you have with so little information?I have several of these and know two things about them.1. The base is on pin 32. The gain is about 30-33 with Ib from <40uA-80uA and began to fall off above 80uANo spec sheet I could find matches what I know about this transistor.I also noticed there are A, B, C and D variants. Is that what the C in the lower left corner means? Does the C mean collector?

author: Jwillis
author_rank: Super Contributor
timestamp: April 27, 2018, 01:26:26 am
content: Google is the compendium of electronic knowledge.. Search 8050 transistor and you'll get lots of information to browse.Generally the suffix letter is a variation of tolerance for the same type of transistor. For example the 2n2222 and 2n2222A very common transistorhttps://www.electroschematics.com/wp-content/uploads/2009/04/2n2222-datasheet.pdf.

author: RomDump
author_rank: Regular Contributor
timestamp: April 29, 2018, 11:35:11 pm
content: Quote from: KILLSWITCH on April 26, 2018, 03:07:11 pmI don't know if the datasheet was a match for your device. I used the Package type and the base number you gave me to narrow it down.Most of my knowledge comes from searching for part information when I was fixing something. I looked where it was in the circuit and what it did.Quote from: KILLSWITCH on April 26, 2018, 03:07:11 pmNot necessarily.Some hints:Look for manufacture logos.Transistors are broken into three Market regions, Americas, Europe, and Japan. So they usually abbreviate just the base number.BTW: I wouldn't use random salvage parts for any of my projects. I would just buy a bunch of jelly bean components and buy special components when required.For repairs I would just use ECG/NTE cross-reference components, (grab a NTE Cross Reference Book as a reference guide).As you look at more components you will get the hang of it.