OT: Difference between PN2222 and PN2222A?

[Ben Hofmann K1NT]

What's the difference between a PN2222 and a PN2222A transistor?  When used as a switch, can a PN2222 be used as a substitute for the PN2222A?  Thanks.
   
  -Ben  K1NT
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[John Bahun]

This will give you the story - They are slightly different....


http://www.ece.utexas.edu/~valvano/EE345L/DataSheets/PN2222-D.pdf


73,

Jb - N6API




John J. Bahun
DTS Engineer
CoreOS/Hardware
Apple Computer Inc.
3 Infinite Loop - Mail Stop 303-2T
Cupertino, California  95014



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On Jul 25, 2006, at 11:28 AM, Ben Hofmann KB1AHR wrote:

> What's the difference between a PN2222 and a PN2222A transistor?  
> When used as a switch, can a PN2222 be used as a substitute for the  
> PN2222A?  Thanks.
>
>   -Ben  K1NT
> _______________________________________________
> Elecraft mailing list
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> You must be a subscriber to post to the list.
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[Stuart Rohre]

Looking at the A suffix 2222, it appears they are graded units having a
higher breakdown voltage across the elements.  It should work anywhere a
2222 without suffix is specified.

The PN 2222 should work in PN 2222A circuits that do not exceed its element
voltage ratings, which if you are building to a 12 volt or less supply
source, would be any application.

-Stuart
K5KVH


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[Alexandra Carter]

My understanding is the 2222A is the military spec version. Maybe I'm  
wrong, but it's got to be something like that, either that or a  
slightly later version...... you might try googling a bit, spec  
sheets for common parts can be pretty easy to find, I'm always  
looking up the simple stuff myself. 73 de Alex NS6Y.

On Jul 25, 2006, at 11:28 AM, Ben Hofmann KB1AHR wrote:

> What's the difference between a PN2222 and a PN2222A transistor?  
> When used as a switch, can a PN2222 be used as a substitute for the  
> PN2222A?  Thanks.
>
>   -Ben  K1NT
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
>  http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

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