2N2405

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

The 2N2405 is a bipolar junction transistor (BJT) manufactured by ON Semiconductor (formerly Motorola). It is one of the most widely-used small-signal transistor devices in the world, and is designed to be versatile and reliable in a wide variety of electronic applications. In this article, we will discuss the 2N2405\'s application field and working principle.

Application Field

The 2N2405 is used in a variety of electronic applications, both analog and digital, including voltage amplification, switching, and oscillator circuits. In particular, the low-current 2N2405 is an excellent choice for low-power, small-signal applications such as amplifier stages, switching, and current-limiting systems.

One of the most common uses of the 2N2405 is as a low-cost amplifier in audio systems, where it can be used to boost audio signals or drive headphones. The 2N2405 is also commonly used in instrumentation and control circuitry for measuring, controlling, or logging data, such as temperature, pressure, humidity, or other physical measurements. Additionally, the 2N2405 can be used in switches and relays, where it can switch a low current (5mA) with minimal power requirements.

Working Principle

The 2N2405 is an NPN, or negative-positive-negative, bipolar junction transistor. NPN transistors have three terminals, the emitter, base, and collector. The emitter receives the electrons from the power source, and the base is used to control the flow of electrons between the emitter and collector. The collector is the output of the transistor, and the amount of current flowing through the collector is proportional to the current flowing through the base.

The 2N2405 operates in saturated mode, meaning that the transistor is conducting at full power as long as it is given a sufficient input current. This allows the 2N2405 to switch quickly and reliably with minimal voltage requirements, making it ideal for low-power applications. The 2N2405 also has a low breakdown voltage, meaning it can operate at higher current levels than other transistor types.

The 2N2405 can be used in amplifier, switching, and other digital applications by connecting it to a power source and pushing a small current through its base. This will cause the 2N2405 to start conducting and output a current proportional to the input current. This allows the 2N2405 to be used as an amplifier stage or switch, depending on its application.

In summary, the 2N2405 is a versatile and reliable transistor device that can be used in a variety of analog and digital applications, including voltage amplification, switching, and oscillator circuits. Its low power requirements and low breakdown voltage make it an ideal choice for low-power applications. Additionally, the 2N2405 can be used as an amplifier or switch depending on the application.

The specific data is subject to PDF, and the above content is for reference