2n5088 leg no? Confused?

[Izzy]

Hi,
I looked at transistors article and it says thansistors legs are numbered, 1,2,3 from left to right when the fransistor in upside down position with legs facing at you. Then In that article its says 2n5088 is also no.the same way 1,2,3 = c,b,e.
But when I looks at the data sheet its the other way around.  dont know which one am I supposed to follow?
http://www.onsemi.com/pub/Collateral/2N5088-D.PDF

help me out here.

[markm]

Could be the data sheet is incorrect or the ON 5088 has a different pinout but, all of the 5088's I've encountered have a pinout
the opposite of what that data sheet shows.

[bent]

the data sheet of futurlec give the same pin-out

http://www.futurlec.com/Transistors/2N5088.shtml


bent

[markm]

Interesting 
I hope JD doesn't mind me posting this but, here's a Very Good guide to transistors in general ( no pun intended!)
http://www.generalguitargadgets.com/pdf/ggg_intro_transistors.pdf

[Izzy]

yes thats exactly the article I was following . Did you notice that article has mentioned leg in one direction and the data sheet has in another direction?
WHich one is corerct?

[RLBJR65]

I have 2N5088's from 3 different manufacturers, with flat up 1 is e,b,c the other 2 are c,b,e. Also have some 2N2222, 2N3904 and 2N3906 that are "backwards" Try to find the data sheet for the brand you have.

You can build this simple transistor checker if you don't have a DMM that will test transistors (bottom of page) http://aronnelson.com/gallery/album81/test?full=1 it will tell you the pinout.

This is a good reason to always use sockets, then you don't have to worry about it in most cases

[markm]

I've used JD's reference for quite a long time and he hasn't steered me wrong yet.....and I've used all different brands
of transistors without a problem.

[Izzy]

Yes I dod have transistor tester in my DMM. But dont know how to use it 

[Izzy]

by the way this is the one I bought.

http://www.smallbearelec.com/Detail.bok?no=292

[RLBJR65]

Yes I dod have transistor tester in my DMM. But dont know how to use it 

Simple turn the meter to the hfe setting, turn it on, plug the transistor into the NPN side either e,b,c or c,b,e. If you have it in right you should get an hfe reading of 350 - 1400.

[Izzy]

Thanks. I havent receieved my items yet, so in a mean time...
how are Small bear's 2n5088 transistors marked when we view them from the bottom?

Are they 1,2,3 = c,b,e

[Izzy]

Hi I am still confused about the transistor leg no. of this 2n5088 that I got from Small bear. Does anyone know?

Its says 2n5088 E - 27 in the transistor. I tried cheking with my crappy Multimeter. When I put that to NPN at C B E as 1 , 2 , 3 it gives me erading of .001
when I put  it at E, B ,C as 1,2,3 it gives me reading of .009.
I am confused. Does anyone knows the leg of this transistor from small bear?

[Izzy]

Anyone?

[ubersam]

I say, forget about the pin numbers and just concentrate on the actual functions. With the transistor's flat side facing you, and the pins pointing down, pins from left to right: E - B - C

Other than that, just get in touch with smallbear and ask him who manufactured the 2n5088 that you received, then find the datasheet to verify the pin IDs.

[Gilles C]

It's the pin-out I always used with mine too.

I would suggest that you test your transistor first with your meter on ohms (diode check scale ) to find the E, B and C pins, and make sure that the transistor is good first. That's the first thing to do. Then check the hfe with the hfe tester of your meter.

http://www.kpsec.freeuk.com/components/tran.htm

http://www.kpsec.freeuk.com/multimtr.htm


Gilles