2N3904 NPN Transistor – General-Purpose Switching & Amplification

The 2N3904 is an NPN bipolar junction transistor (BJT) known for its versatility in switching and amplification applications. It has a collector-emitter voltage of 40V, a collector current of 200mA, and a transition frequency of 300MHz, making it suitable for use in low-power amplifiers, logic circuits, and general switching applications. Its fast switching speed and low saturation voltage make it a preferred choice in digital and analog circuits, including microcontroller projects and signal processing applications.