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Transistor ID help find

ken2028

Feb 25, 2013
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Hello,

I am looking for this Motorola Transistor..

I drew an exact picture on the transistor..

Can someone help me please identify this transistor?

So I can find a replacement

thank you...
 

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davenn

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Sep 5, 2009
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HI Ken
welcome to the forums :)

I tried 2N7929 without much success
there is sure to be a prefix .... manufacturers often leave them off the package grrrr

what is the device out of ?
do you know for sure that it is faulty?

a little more info from you :)

Dave
 

ken2028

Feb 25, 2013
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here

I took a picture
 

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ken2028

Feb 25, 2013
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another picture

did a resistance and polarity check
 

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shrtrnd

Jan 15, 2010
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Motorola no longer exists.
(They''re now 'ON Semiconductor')
This may not help, but when I need to know On Semi full part numbers, I've gone
to the On Semiconductor website, and used their 'Contact' selection to send my
inquiry. So far, with ON Semi devices, they've replied to my request with the full
part number. Maybe they'd do it for old Motorola part numbers?
 

ken2028

Feb 25, 2013
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:(

I cant believe its so hard to find a replacement :(

I dont know what to do

Can't I use a substitute PNP?
 

(*steve*)

¡sǝpodᴉʇuɐ ǝɥʇ ɹɐǝɥd
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Jan 21, 2010
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Without specs, or perhaps the schematic so we can see what is required, yes it can be hard.

It's a bit like having a bolt and looking for a replacement without knowing the size, thread type, length, material, etc.

edit: If the circuit os not very demanding of any particular parameter, then yes, you may be able to replace it with something that is not a direct replacement. Of course we don't know it's actually a PNP transistor (presumably you do)
 

ken2028

Feb 25, 2013
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I dont have a transistor analyzer.. I wish I had a DCA55 analyser
 

duke37

Jan 9, 2011
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Depending on what your meter does, it may be a germanium transistor with about 0.25 drop across the junctions. The base is the middle pin. You can find which is the emitter and collector by measuring the gain either way round. The measurements you have made would indicate that it is OK.

What is the age of the equipment?
 

ken2028

Feb 25, 2013
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Look what I recieved

Thank you for contacting ON Semiconductor



Your part number is most likely customer special part SPS9599 which has been discontinued. We can not disclose any information regarding custom part numbers. Sorry for any inconvenience caused.

Regards, Martin
ON Semiconductor
Technical Support Center

Subject: here is the actual transistor

Description of customer request:

I need your please. I am looking for this part or a substitute for it.. I am sending you a picture..

Thank you so much...
 

shrtrnd

Jan 15, 2010
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Well, it's difficult finding data on your transistor because it's a proprietary part number.
At least you now know that much.
 

ken2028

Feb 25, 2013
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Feb 25, 2013
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I bought this
LCM3 ESR C,L meter,tester/ 90 kHz and Semiconductor tester
 
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