BD895-S

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BD895-S is a high power NPN transistor which features a high breakdown voltage (VCEO), low collector-emitter saturation voltage (VCE sat), and high current gain bandwidth product (fT). It finds application in voltage and current amplifiers, power drivers and linear equipment. This article will discuss the application fields of the BD895-S and its working principle.

Application Fields

The BD895-S is a popular choice for audio, power electronics, and servo motor applications. It has been used in car amplifiers, power supplies, and rectifiers for some time now. It can be used to drive servo motors in robotic or automated systems. Furthermore, a BD895-S current amplifier works in amplifier circuits to boost the output current of audio frequency signals. The applications of the BD895-S also include power drivers in advanced telecommunication systems.

Due to its high current gain bandwidth product (fT), the BD895-S transistor can be used in frequency doubler circuits. It can also be used in oscillator and free-running circuits as well as Class-A power amplifiers. Therefore, it is a versatile device that can be used in a wide range of applications.

Working Principle

The BD895-S is an NPN transistor, which means it’s composed of three layers of semiconducting material. The central layer (the base) is much thinner than the two other layers (the emitter and collector). The base-emitter junction acts as a switch, and when current flows from the emitter to the base, it turns the transistor on, allowing current to flow from the collector to the emitter.

The BD895-S is also a transistor with a high current gain bandwidth product (fT). This means that the current (Ic) multiplied by the bandwidth (f) of the transistor is much higher than the collector-emitter voltage (VCE). This is useful when driving power amplifiers and other devices that require high current.

In order to achieve the highest possible efficiency, the BD895-S should be driven with a high frequency signal. This will ensure that the collector-emitter voltage (VCE) is kept as low as possible, while allowing the current gain bandwidth product (fT) to be as high as possible. The large current gain bandwidth product (fT) of the BD895-S also helps to minimize quiescent current consumption, allowing it to achieve higher efficiency than other NPN transistors.

Conclusion

The BD895-S is a high power NPN transistor with a high breakdown voltage (VCEO), low collector-emitter saturation voltage (VCE sat), and large current gain bandwidth product (fT). It is used in a wide range of applications, including car amplifiers, power supplies, rectifiers, servo motors, frequency doubler circuits, and oscillator circuits. Its large current gain bandwidth product (fT) allows it to achieve high efficiency and minimize quiescent current consumption.

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