Packages TO-92 TO-92-3 3-TO-92

hi 3v0

Perhaps this will help.

eric
 
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Having all those different packages seems pretty pointless; I don't know why the manufacturers just don't stick with the plain old TO-92.
 
The different style of pinouts allow board manufactors to tune their PCBs better, some board layouts might cause a standard TO-92 to require a via or jumper to connect it to it's proper spot. Change the pinout and the leads will route correctly and more neatly.
 
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