2N4400_D81Z

The 2N4400_D81Z is a shear, planar, epitaxially grown NPN transistor with maximum ratings of Collector-Emitter Voltage of 30 volts, Base Current of 15 milliamperes, and Collector Current of 100 milliamperes. It is an all around versatile transistor, making it suitable for a wide variety of applications. From simple switching and general amplifying, to the more complex audio amplifiers and pulse circuits, the 2N4400_D81Z is well suited to do the job.

The 2N4400_D81Z belongs to the class of transistors known as Bipolar Junction Transistors (or BJT\'s for short). As its name implies, this type of transistor has two terminals (collector and emitter) that are connected to three layers within the device (base, emitter, and collector). The collector is connected to the emitter, and serves as a current path, while the base terminal allows current flow to and from the emitter. When sufficient current flows through the base terminal, the transistor is said to be conducting and its Collector-Emitter current is proportional to the Base current.

The main application field of the 2N4400_D81Z is power switching. It is commonly used to switch high current loads, allowing them to be turned on or off with a low power control signal. One primary example of such an application is DC motor control. By using the 2N4400_D81Z to switch between a DC voltage source connected to the motor and ground, the motor can be easily turned on and off. This transistor can also be used for audio amplification. By connecting it to an audio source, such as a phone or computer, the transistor can be used to amplify the signal and drive a speaker for louder sounds.

The working principle of the 2N4400_D81Z is based on the principle of controlling the flow of current from the collector to the emitter by applying a voltage to the base. This is accomplished by having three separate layers (base, emitter, and collector) inside the device that can be individually adjusted to alter the flow of current through the transistor. When a voltage is applied to the base of the transistor, it alters the flow of current between the emitter and collector. By varying the voltage applied to the base, the transistor can be used for basic switching and amplification.

In summary, the 2N4400_D81Z is a single-stage bipolar junction transistor with a maximum Collector-Emitter Voltage rating of 30 volts, 15 milliamperes Base Current, and 100 milliamperes Collector Current. It is often used in power switching and audio amplification applications. The working principle of the transistor is based on controlling the current flow between the emitter and collector by adjusting the voltage applied to the base.