2n3819 fet

Thread Starter

tibbles

Joined Jun 27, 2008
249
while looking this fet up on the data sheets from 2 different manufacturers, the pinouts seemed to be different, am i going mad.?one had pin 1 for drain, one had pin 3

regards
dougal
 

beenthere

Joined Apr 20, 2004
15,819
Yep, Fairchild sez DGS, ON has SDG. This was a wonderful problem with TO-92 packaged devices for years - you had to know who made the device to have the correct pinout, or else you test each transistor.

The cure is to purchase from only one source and figure out which pinout you have.
 

Audioguru

Joined Dec 20, 2007
11,248
Many Jfets like the 2N3819 are symmetrical. Their drain and source can be connected backwards with no difference in performance.
 
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