BD679ASTU

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The BD679ASTU is a NPN, commonly used bi-polar junction transistor (BJT) with a wide range of applications. It is used as an transistor amplifier due to its ability to amplify and switch analog and digital signals. It is also used as a switch to control current flow because of its ability to switch between two states. The transistor works as a current amplifier, providing a relatively large output current when the input to base current is small. It has a power dissipation of 625mW and a storage temperature of -65°C to 150°C.

The working principle of the BD679ASTU is based on the principle of the BJT, which works when electrons travel from the base to the emitter, forming an avalanche of current from collector to base. In this configuration, the BD679ASTU works as an amplifier. It amplifies input current applied at the base, to produce an amplified output current at the collector.

The transistor can be used in many different applications, such as audio amplifiers, radio transmitters, radio receivers, switching circuits, and relay drivers. In audio systems, it can be used to amplify sound by boosting weak signals before amplifying them with an amplifier. It can also be used in modulators, amplifiers and signal switches. In radio circuits, it works as a filter, switching signal frequencies to achieve certain signal quality and fidelity. In switching circuits, the transistor is used to switch among different states in order to control the current flow. In relay drivers, it is used to supply large currents to actuator and contact points.

The BD679ASTU can also be used in power applications due to its ability to carry large currents withstanding high voltages. In these applications, it provides a high level of current output, allowing higher power outputs. It can also be used in DC motor circuits and inverters.

The BD679ASTU is relatively easy to use, provided the user has the proper understanding of the transistor’s working principle and its limitations. It is important to note that overly high supply voltages can cause the device to permanently damage.

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