• Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.

Transistor base voltage/current?

Not open for further replies.


I have downloades a couple datsheets to transistors that i have, and now i'm a bit confused. I want to know what is the MIN/MAX current/voltage the base can take so that the transistor starts to lead/doesn't break.

Is it the Emitter-Base voltage? the Base-Emitter on voltage? Base Current? (in the datasheet)

And what does "cutoff current" mean?

Any help is welcome :)


Active Member
To turn on a transitor the difference betwwen base and emitter voltage (Vbe_min) should be 0.7V for silicon transistor and 0.3V for germanium. Normally base current of transistor is of the order of uA, giving more base current will saturate the transistor and may lead to junction breakdown.
Not open for further replies.

Latest threads

EE World Online Articles