transistor equivalent

[subzero349]

hello, I have a circuit that calls for a MPSA40 NPN transistor.... can somebody suggest an equivalent transistor?

 

[sinan mohammed]

hello i have a book for equivalents and i did not find it

but could you tell me the type if the trans.(NPN PNP)

and the type of the cct.

this could be able me to suggest the equ.

 

[seeker]

Hi subzero,

I found this : https://www.electro-tech-online.com/custompdfs/2003/08/AN-3006-1.pdf
(figure 3)
It appears to be a small-signal, NPN general purpose transistor such as 2N3904 as it's used in that circuit.

Hope this helps

 

[Roff]

That's funny, Subzero. He found your app note. MPSA40 must be a typo. I already told you a 2N3904 would work. Didn't believe me, huh? :twisted:

 

[Roff]

This was a duplicate post. I would delete if if I could - but no!