The 2N3904 is a widely used Silicon NPN (Negative-Positive-Negative) transistor housed in a TO-92 package, designed for general purpose applications. This versatile component is capable of operating as a switch or amplifier in electronic circuits, making it a staple in both hobbyist and professional projects.
Key attributes include its collector-emitter voltage (VCEO) of 40V, allowing it to handle moderate voltage applications. The transistor's continuous collector current rating of 200mA enables it to drive small loads directly. Its thermal characteristics ensure reliable operation over a wide temperature range, making it suitable for various environments.
Transistor
Transistors are fundamental components in electronic circuits, acting as switches or amplifiers. The NPN transistor, such as the 2N3904, is a type where the current flows between the collector and emitter, controlled by the base voltage. These components are critical for creating logic gates, amplifiers, and switching circuits.
When selecting a transistor, key parameters such as the collector-emitter voltage, current handling capability, and gain need to be considered. The package type also affects the thermal characteristics and mounting options. The 2N3904's general-purpose nature and its TO-92 package make it versatile for a wide range of applications, from DIY projects to industrial systems.
Understanding the transistor's switching characteristics, such as delay and rise times, is important for designing circuits with precise timing requirements. Additionally, the small-signal characteristics, including current gain and input impedance, are crucial for applications involving signal amplification or processing.
Overall, the choice of transistor depends on the specific requirements of the application, including voltage, current, frequency, and power dissipation needs. The 2N3904 offers a balance of performance and reliability, making it a popular choice among engineers and hobbyists alike.