From: "Michael A. Terrell"
Subject: Re: Looking for equivalent of weird transistors
Date: Wed, 11 Dec 2002 19:14:41 -0500
Organization: Have you seen my bench? No, really! Where is it?
X-Mailer: Mozilla 4.61 [en]C-CCK-MCD (Win95; U)
Spehro Pefhany wrote:
> On Wed, 11 Dec 2002 15:32:44 -0500, the renowned "Michael A. Terrell"
> >Industry Number : 2SA1248
> >NTE Device Number: NTE374
> >T-PNP,SI-AF DRIVER,TO-126
> >Industry Number : 2SC3116
> >NTE Device Number: NTE373
> >T-NPN,SI-AF DRIVER,TO-126
> >Download their cross reference software at:
> Danger, Will Robinson! The NTE "data sheets" are the
> sketchy and are the specs for their subsitute parts, not
> for the original parts. There are often, as in this case,
> subtle differences between the original and the substitute,
> though they are usually close enough for repair work.
> You may not have much of a choice if you can't source
> the originals.
> Best regards,
> Spehro Pefhany
> "it's the network..." "The Journey is the reward"
> email@example.com Info for manufacturers: http://www.trexon.com
> Embedded software/hardware/analog Info for designers: http://www.speff.com
That is often the case for older 2SC XXXX transistors. It does give
you an idea of the what the original part was, and then you can choose a
part with better specs. I have had to use countless SK, HEP, ECG, and
NTE replacements in the past 35 years, and while you can run into
problems, I have in less than 1% of replacements. I prefer the original
part whenever possible, but sometimes you have to scratch in the cracks
at the bottom of the barrel for some type of information. i use the NTE
reference to file small quantities of semi's. 35 cross to one number,
so a single drawer holds them, rather than a full cabinet of similar
parts. I have over 1200 drawers full of components sorted so I can find
something when I need it. When you have trouble standing for very long
you have to be creative.
Michael A. Terrell