2SC3940ASA Discrete Semiconductor Products

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The 2SC3940ASA is a bipolar junction transistor (BJT) that has been specifically developed for the medium frequency driver amplifier in ultra-small radio communication equipment. It is a very common part in mobile radio applications and is often used in high-output power conversion applications. This single transistor is designed for low voltage operation, has a high current capacity, low noise and high reliability.

The 2SC3940ASA is a PNP transistor with a maximum collector-base voltage of 30V and a maximum collector-emitter voltage of 25V. The maximum DC collector base current of this transistor is 2A and the maximum DC collector emitter current is 1.5A. It has a low collector-base capacitance of 1.2 pF, making it suitable for use in applications such as mobile radio or RF communication devices.

The working principle of the 2SC3940ASA is that a small current is passed through two bipolar transistors, that form an internal circuit. When the small current passes through the circuit, the voltage difference between the collector and the emitter increases, resulting in a larger output current. This current can then be used to drive an amplifier or as a power source for numerous other applications. The transistor works in both the NPN and the PNP configuration and can be used in both single-ended and balanced output applications.

The 2SC3940ASA is used in a wide variety of applications including mobile radio amplifiers, radio transmitters, radio receivers, and various other communication devices. It is used in these applications because of its low noise, high-output power conversion, and low voltage operation. It is mainly used in portable electronic devices such as mobile phones, MP3 players, GPS devices, and intelligent digital devices. This transistor is also used in car audio amplifiers and in digital television distribution systems.

In conclusion, the 2SC3940ASA is a single bipolar junction transistor (BJT) that is very common in mobile radio applications and is used in many different applications due to its low voltage operation, low noise and high current capacity. It is compatible with both the NPN and the PNP bipolar transistors and can be used in both single-ended and balanced output applications. The transistor has a high output power conversion and is mainly used in portable electronic devices such as mobile phones, MP3 players, GPS devices, and intelligent digital devices.

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