A very simple bare minimum circuit for a transistor to work as an amplifier is shown below. So if you are looking for an NPN transistor for you amplifier circuit, then this transistor might be the right choice.Īs told earlier the 2N5551 NPN transistor is widely used for amplification.
It also has decent switching characteristics (Transition frequency is 100MHz) hence can amplify low-level signals.ĭue to this feature, the transistor is commonly used for amplification of audio or other low power signals. The 2N5551 is an NPN amplifier Transistor with an amplification factor (hfe) of 80 when the collector current is 10mA. Current Drains out through emitter, normally connected to groundĬontrols the biasing of transistor, Used to turn ON or OFF the transistorĬurrent flows in through collector, normally connected to load
