The MMBT3904-AQ NPN transistor, manufactured by Diotec and available from Supreme Components International, an authorized distributor, is a versatile component for a wide range of electronic circuits. This bipolar junction transistor (BJT) is designed for amplification and switching applications. Encased in a small SOT-23 package, it's ideal for space-constrained designs. Key specifications include a collector-emitter voltage (Vceo) of 40V and a continuous collector current (Ic) of 200mA. The MMBT3904-AQ is commonly used in signal amplification, switching circuits, and driver stages. Its reliable performance and compact size make it a popular choice for both hobbyists and professional engineers. Supreme Components International guarantees the authenticity and quality of this Diotec product.