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Old 29th Mar 2023, 5:40 pm   #10
kalee20
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Join Date: Feb 2007
Location: Lynton, N. Devon, UK.
Posts: 7,059
Default Re: Silicon transistor failure

Quote:
Originally Posted by G6Tanuki View Post
Personally I never really liked TO92; I always specified TO18 in things I designed, though sometimes had to use the little TO92-alike Ferranti transistors [the ZTX series] for commercial reasons. ZTX ones always seemed reliable.
I went for TO18, TO5 (=TO39) too, but TO92 seemed to be the package of choice for manufacturers!

I also liked the silicone E-line ZTX range, but these went obsolete, which was a great shame.

I'm rather watching this thread - TO92 doesn't have a particularly impressive temperature range, but I didn't know there was a life-limiting mechanism.

One of the longest-life packages was the Mullard/Philips glass encapsulation as used for OC71 etc. The later metal TO7... well we all know what happens to AF117's...
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