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TO-105 and TO-106 transistor cases

Arran Cameron
Does anybody remember transistors with TO-105 and TO-106 cases? They were circular plastic (on a ceramic base) with a dome top.


Were they the predecessor of the ubiquitous TO-92?
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    I always got the impression that the TO-105 was the plastic version of the TO-5 metal can with the same lead spacings, so transistors with both packages would be interchangeable on the same PCB.


    Two other oddities are Mullard / Philips transistors with the lockfit or X09 case, and Ferranti / Zetex transistors with the e-line or X11 case.


    When exactly were devices in the TO-92 package first produced?


     

     


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  • 0
    I always got the impression that the TO-105 was the plastic version of the TO-5 metal can with the same lead spacings, so transistors with both packages would be interchangeable on the same PCB.


    Two other oddities are Mullard / Philips transistors with the lockfit or X09 case, and Ferranti / Zetex transistors with the e-line or X11 case.


    When exactly were devices in the TO-92 package first produced?


     

     


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