transistor

[anton12]

Hi i need some low power transistor that his  base curent somthink about 30-40 ma  and the collector  curent  200-300ma.can somone help me?

 

[audioguru2]

A transistor with a 300mA collector current and a 40mA base current has a current gain of only 7.5. This is an extremely low gain number for a low power transistor.
I would use a 2N4401 NPN transistor for a 300mA collector current. Its base current will be somewhere between 1.5mA and 6mA.

 

[anton12]

thank you i will try