MICROCHIP TECHNOLOGY 2N4903 is a general-purpose NPN bipolar junction transistor (BJT) in a TO-92 package. This silicon transistor is suitable for a wide range of amplification and switching applications. It offers a continuous collector current of 600 mA and a collector-emitter voltage of 40 V. The 2N4903 is commonly employed in industrial control, consumer electronics, and automotive systems where reliable switching and amplification are required. Its robust design and established performance make it a staple component for circuit designers. The component is available in bulk packaging.