unknown component help

[Vincenzo]

It measures as a Si NPN BJT with base in the middle. I need help finding it's datasheet. Tried the famous websites.

[bob91343]

Where did it come from?

[Vincenzo]

If I knew, problem solved, but I don't. It's from a salvaged components I had for a long time

[bob91343]

How many do you have?  If only one or two, I would scrap them.  But if you have a drawer full, it might pay to investigate further.

[Doctorandus_P]

You can do some measurements yourself.
It you've got an adjustable high voltage source, you can use a series resistor to find it's breakdown voltage (It will start acting as a zener about 20% or 30% over it's rated voltage.)

If you puch too much current through it then Hfe will start decreasing.
 Dong a few of such measurements can be educational, but for other purposes, why bother? You can get assortments of some 600 transistors for EUR10 or less.

[bdunham7]

Perhaps a Motorola (now Freescale) SPS233 aka 2N3643.

https://datasheetspdf.com/pdf-file/571071/CentralSemiconductor/2N3643/1

Medium-voltage NPN 250MHz hFE 100-ish.

[Vincenzo]

How many do you have?  If only one or two, I would scrap them.  But if you have a drawer full, it might pay to investigate further.

I don't scrap anything. I love my stuff 
(It's not about this specific component, but I am hoping that someone out there has a general advice....other than throwing stuff away)

[Vincenzo]

You can do some measurements yourself.
It you've got an adjustable high voltage source, you can use a series resistor to find it's breakdown voltage (It will start acting as a zener about 20% or 30% over it's rated voltage.)

If you puch too much current through it then Hfe will start decreasing.
 Dong a few of such measurements can be educational, but for other purposes, why bother? You can get assortments of some 600 transistors for EUR10 or less.

Who is EUR10, is that the name of a star trek spaceship?

The main use for a discrete component (for me) is to know the maxima (power, frequency, ...etc) and those cannot be measured because if you exceed them, you will damage the component

Thanks

[Vincenzo]

Perhaps a Motorola (now Freescale) SPS233 aka 2N3643.

https://datasheetspdf.com/pdf-file/571071/CentralSemiconductor/2N3643/1

Medium-voltage NPN 250MHz hFE 100-ish.

Ah, so you took the 3 digit number (just curious). The four digit one is a date? there were no transistors in the twenties and thirties, there was vacuum tubes and communism and fascism (too small to be a tube  )

[Hydrawerk]

Hello, can someone recognise this? Is it a LED module or what? I saw it in a clearance sale, I did not buy it so I cannot do any measurements. Google did not help.
EDIT: There are only four pins!

[amyk]

^ Yes, some info here (may need to use translator): https://teron.online/index.php?showtopic=2024703