ON Semiconductor 2N3903 NPN Transistor

The ON Semiconductor 2N3903 is a versatile NPN bipolar junction transistor (BJT) designed for general-purpose amplifier and switching applications. This transistor is widely recognized for its reliable performance and affordability, making it a staple in electronic circuits.

Key Features:

• High Current Gain (h<sub>FE): The 2N3903 offers a high current gain, typically around 100, which is beneficial for amplification purposes.
• Low Saturation Voltage: The device operates with a low collector-emitter saturation voltage, ensuring efficient power usage and reduced heat dissipation.
• TO-92 Package: Encased in a TO-92 package, the 2N3903 is compact and suitable for through-hole mounting, simplifying the assembly process.
• Versatility: This transistor is capable of driving moderate loads and can be used in a variety of electronic circuits, including amplifiers, switches, and signal processing.

Electrical Characteristics:

• Collector-Emitter Voltage (V<sub>CEO): 40V
• Collector-Base Voltage (V<sub>CBO): 60V
• Emitter-Base Voltage (V<sub>EBO): 6V
• Collector Current (I<sub>C): 200mA
• Power Dissipation (P<sub>D): 625mW

The 2N3903 is designed to handle continuous collector currents up to 200mA, making it suitable for a range of low-power applications. Its power dissipation capacity of 625mW allows for satisfactory operation without the need for additional heat sinking in most applications.

Applications:

• Audio amplifiers
• Signal processing
• Switching circuits
• Linear amplification
• Driver stages in hi-fi amplifiers and television circuits

ON Semiconductor's 2N3903 is a reliable choice for designers and hobbyists alike, offering a balance of performance, ease of use, and cost-effectiveness. Its robustness and general-purpose nature make it an essential component in a wide array of electronic projects.