# High base-emitter voltage NPN transistor

I just bought some NPN transistors for my project. I didn't notice before buying them, that the specification said the transistor had a emitter base voltage $V_{be}$ of 9 volts. Can this be true? This value is normally 0.7 Volts right?

Here are a screenshot of the specifications:

• What SP said - but note this is not a value you would usually get near in most circuits - it's just a limit. – Russell McMahon Aug 17 '14 at 13:46

## 1 Answer

You're thinking of the base-emitter voltage (forward biased). The datasheet specification is for the emitter-base voltage, which is the reverse breakdown voltage (guaranteed minimum) of the emitter-base junction.

Most BJTs have a rating in the 5-9V range, a few have breakdown voltages similar to the collector-base breakdown voltage.