Author Topic: Found a stash of Motorola DPC202F. What is it?  (Read 1514 times)

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Offline YansiTopic starter

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Found a stash of Motorola DPC202F. What is it?
« on: March 17, 2020, 05:01:13 pm »
During a little cleanup I have found a stash of these Motorola DPC202F. Seems to be NPN transistors. But I could not find any datasheet for them. Likely custom labeled?

950998-0
 

Offline YansiTopic starter

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #1 on: March 17, 2020, 06:13:09 pm »
Well, from the date code it is 1974 so I wouldn't suspect germanium. (They are indeed silicon based).

I have tried to measure Vcbo, but failed. I do not have currently a high voltage source on hand,  but Vcbo seems to be way above 100V, as there was no current flow even at 100V, which is the maximum my PSUs will give combined. 
 

Offline Stray Electron

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #2 on: March 17, 2020, 06:20:34 pm »
   Those look like pulls so they're probably of little resale value. Also given the date code there are much better parts available now.
 

Offline duak

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #3 on: March 17, 2020, 06:46:10 pm »
Here's a tenuous connection:

Look for 'DPC202'  in https://archive.org/stream/bitsavers_decfieldSeceTechnicalManualDec74_38830089/1974_Field_Service_Technical_Manual_Dec74_djvu.txt

House numbered version of 2N4233 or 2N3054 and were used in printers.

These look like TO-66 cases.  Since they are pulls, one source would be a printer driver assembly rendered for parts.
 

Offline YansiTopic starter

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #4 on: March 17, 2020, 06:50:07 pm »
Well, I haven't said I want to sell them. That was you.

I am just interested as what these may be. And sure, they are pulls.
 

Online Benta

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #5 on: March 17, 2020, 06:51:00 pm »
TO-66 cases. Custom labeling is very likely, Motorola used to do that a lot in those days.

 

Offline YansiTopic starter

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #6 on: March 17, 2020, 06:56:47 pm »
Here's a tenuous connection:

Look for 'DPC202'  in https://archive.org/stream/bitsavers_decfieldSeceTechnicalManualDec74_38830089/1974_Field_Service_Technical_Manual_Dec74_djvu.txt

House numbered version of 2N4233 or 2N3054 and were used in printers.

These look like TO-66 cases.  Since they are pulls, one source would be a printer driver assembly rendered for parts.

Thanks, it seems you have nailed it, thanks. Likely a 2N4233, a 90V 3A NPN. Explains why nothing was happening still at 100V.

So nothing interesting, really.
 

Offline duak

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #7 on: March 17, 2020, 06:59:41 pm »
I used to work with DEC stuff integrating them into our systems and sort of remember a company called Dataproducts and one of their printers.  https://en.wikipedia.org/wiki/Dataproducts  Their symbol is familiar.  Could DPC be an abbreviation for Data Products Company/Corporation?  Coincidence?  You decide!
 
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Offline ETITsynthesizer

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Offline ArthurDent

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Re: Found a stash of Motorola DPC202F. What is it?
« Reply #9 on: March 17, 2020, 09:02:38 pm »
Back when the 2N3054 were used in power supplies to drive the 2N3055 pass transistors or alone where far less power was required.
 

Offline YansiTopic starter

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