# PNP vs NPN

--weezl--
Member - Posts: 44
Joined: September 12, 2011
Posted: January 19, 2018 at 9:54 AM / IP Logged
I'm doing my level 2 heavy duty course right now, electronics section, instructor is talking about PNP vs npn transistors (I know they aren't relays, but they are similar in many ways) instructor says he has a very easy way to remember npn vs PNP, but can't tell us because it's offensive and he could get in a LOT of trouble...
Does anyone have any idea what this method would be?
I found a lot of things that say
PNp means
Pointing iN
NPN means
Not Pointing iN
But this is bugging the whole class, as to what the "dirty" version is.
Thanks!
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lmlisak
Member - Posts: 3
Joined: September 02, 2016
Location: Illinois, United States
Posted: January 22, 2018 at 6:00 PM / IP Logged
???
I was not taught that...
I dont want to imagine an instructors take on a xistor..
xyzzy
astuff
Member - Posts: 7
Joined: January 07, 2017
Location: Pennsylvania, United States
Posted: January 27, 2018 at 12:21 AM / IP Logged
Left off a word:    PNP = Pointing iN Please
jaybonez
Member - Posts: 4
Joined: March 06, 2018
Location: Arizona, United States
Posted: April 07, 2018 at 7:47 PM / IP Logged
Pnp means positive negative positive and npn negative positive negative and I am almost one hundred percent that this refers to the leads that come out of the bottom so the pnp would mean the first lead is positive and the middle lead is negative and the third lead is positive .and vise versa or the npn
%Pattonz~pleasure~palace%
i am an idiot
Platinum - Posts: 13,334
Joined: September 21, 2006
Location: Louisiana, United States
Posted: April 07, 2018 at 8:17 PM / IP Logged
On a schematic diagram, the symbol for a transistor has an arrow on it. The arrow points to the negative junction. Symbol for npn
symbol for pnp
NPN not pointing in. The arrow points away from the center.
PNP pointing in Please The arrow points to the center junction. (Known as the Base)

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