"Charles the ****wit "
http://www.electronics-radio.com/art..._numbering.php
** Some just as dopey as "Charles" must have written the above drivel.
Fraid it is just plain WRONG !!
2N5459 = j-fet.
2N4444 = SCR
2N5446 = triac
Hard to decipher some semiconductor part numbers, these days.
1N, 2N, 3N devices are well defined...
** Like hell they are.
..... Phil