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Groups > sci.electronics.basics > #46215
| Subject | Re: Transistor identification? |
|---|---|
| Newsgroups | sci.electronics.basics, sci.electronics.components, sci.electronics.design, sci.electronics.repair, alt.engineering.electrical |
| References | <0001HW.1B9B87FD00098A2611E4F83CF@news.eternal-september.org> <msgncj$omu$1@dont-email.me> |
| From | John Robertson <spam@flippers.com> |
| Date | 2015-09-07 13:29 -0700 |
| Message-ID | <i7KdnQVeVIs3bnDInZ2dnUU7-LGdnZ2d@giganews.com> (permalink) |
Cross-posted to 5 groups.
On 09/05/2015 11:46 PM, N_Cook wrote:
> On 05/09/2015 21:28, DaveC wrote:
>> Help with identifying a TO-92 transistor?(at least I think it’s a
>> transistor…)
>>
>> Pretty vanilla-looking with National Semi logo. Marked:
>>
>> NS 444
>> ST
>> 13903
>>
>> (The “NS” is the logo.)
>>
>> Not enough 4’s to make up a standard 2N number, and 13903 looks like a
>> date
>> code?
>>
>> Ideas?
>>
>> Thanks,
>>
>
> Or maker ST and date code for 1994 or 2004 or whatever goes with NS as
> plant/batch code for a particular decade
His next post gave a link to a photo of the transistor. Sure looks like
National Semiconductor to me. My guess is the date is from the 90s based
on the edge of the capacitor shown in the same photo - makes the date
1994 and 44th week.
It will be Silicon then and Ted's recent post in this thread gave a very
good explanation on how to identify its parameters using an identical
transistor.
The OP could tell us if there are other transistors using the 13903, but
a different code beside the NS symbol - that would pretty much show that
three digit number is the date code if it is something like 4xx, 3xx, or
5xx which would be a reasonable spread for date codes for a special run.
John :-#)#
--
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Back to sci.electronics.basics | Previous | Next — Previous in thread | Next in thread | Find similar
Transistor identification? DaveC <not@home.cow> - 2015-09-05 13:28 -0700
Re: Transistor identification? DaveC <not@home.cow> - 2015-09-05 14:18 -0700
Re: Transistor identification? DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-09-05 20:03 -0400
Re: Transistor identification? John Robertson <spam@flippers.com> - 2015-09-05 21:52 -0700
Re: Transistor identification? DaveC <not@home.cow> - 2015-09-05 23:05 -0700
Re: Transistor identification? John Robertson <spam@flippers.com> - 2015-09-06 00:05 -0700
Re: Transistor identification? piglet <erichpwagner@hotmail.com> - 2015-09-06 08:11 +0100
Re: Transistor identification? "Tim Williams" <tmoranwms@charter.net> - 2015-09-05 20:52 -0500
Re: Transistor identification? DaveC <not@home.cow> - 2015-09-05 21:40 -0700
Re: Transistor identification? "Tim Williams" <tmoranwms@charter.net> - 2015-09-06 13:03 -0500
Re: Transistor identification? "Ian Field" <gangprobing.alien@ntlworld.com> - 2015-09-17 20:16 +0100
Re: Transistor identification? krw <krw@nowhere.com> - 2015-09-17 20:05 -0400
Re: Transistor identification? Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net> - 2015-09-18 10:50 -0400
Re: Transistor identification? Jeroen Belleman <jeroen@nospam.please> - 2015-09-18 09:08 +0200
Re: Transistor identification? N_Cook <diverse@tcp.co.uk> - 2015-09-06 07:46 +0100
Re: Transistor identification? John Robertson <spam@flippers.com> - 2015-09-07 13:29 -0700
Re: Transistor identification? DecadentLinuxUserNumeroUno <DLU1@DecadentLinuxUser.org> - 2015-09-07 16:35 -0400
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