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What is this SOT-23 part?

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In cleaning up my office, I found a strip of SOT-23 parts that got separated from their identifications. The only markings are "R12":

I suspect it is a voltage regulator or reference, but it could be anything. I looked at a few datasheets, but none of them mentioned this marking or anything close to it. What is this?

In general, how does one get the full part number from abbreviated markings like this? Datasheets tell you markings from the part number, but manufacturers don't seem to have lists that do the reverse. Other than getting lucky and finding the right datasheet, how do you find the manufacturer and part number in a case like this?

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posted 7 months ago

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Olin Lathrop‭

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Manufacturer lists (1 comment)

There's no general algorithm for finding a useful IC part number from SOT23 markings. (2 comments)

Lundin‭ wrote 7 months ago

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but manufacturers don't seem to have lists that do the reverse

Generally they don't but here I have to give credit to one of my favorite manufacturers Vishay - they actually do this for every type of component they ever sold. You do have to know the type (diode, capacitor etc) then go to https://www.vishay.com/en/how/onlineliterature/online-libraries/ and search for markings. They have great lists as pdf and even cover old parts from General Semi and other mergers.

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Comments on What is this SOT-23 part?

What is this SOT-23 part?

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