BUL89

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 BUL89 transistor is a single, bipolar junction transistor (BJT) used in a variety of applications. The BUL89 has a current gain of approximately 40 and a high breakdown voltage of 150 volts. It is a low-power and high-frequency device.

A bipolar junction transistor, or BJT, is an electronic device with three terminals, composed of two P-N junctions, which are also known as base-collector (B-C) and base-emitter (B-E). It is an active component used in many applications such as switching, amplifying, and signal modulation.

The BUL89 transistor is an NPN device, meaning that its collector is connected to the negative supply voltage, and its emitter is connected to the positive supply voltage. NPN transistors work by using the base current, In, to control the collector current, Ic. When In is low, the collector current is off and no current flows through the collector-emitter path. When In is increased, the collector current increases, and the transistor turns on. This is known as the saturation region.

The BUL89 can be used in many different applications. It is commonly used in audio amplifiers, preamplifiers and switching circuits. In audio amplifiers, the BUL89 transistor can be used as an amplifying element, increasing the current or voltage level of a signal. In preamplifiers, the transistor can be used to increase the gain of a signal before it is sent off to other components. In switching circuits, the BUL89 can be used to control the flow of current in a circuit.

When operating in the linear region, the gain of the BUL89 is the ratio between the output current and the input current, which is known as the current gain. The current gain of the BUL89 is typically between 30 and 50. When operating in the saturation region, the gain of the transistor is slightly reduced, but is still much higher than in the linear region.

The BUL89 transistor is a PNP device, meaning that its emitter is connected to the negative supply voltage, and its collector is connected to the positive supply voltage. PNP transistors work in reverse of NPN transistors, as the base current In, is used to control the emitter current. When In is low, the transistor turns off. When In is increased, current flows through the collector-emitter path, allowing the transistor to turn on.

The BUL89 transistor can be used in a variety of applications, and it is a very versatile device. It is often used in power supply and power amplification circuits, as the current gain of the transistor allows it to control the current flow and increase the power of a signal. It is also used in speed control circuits, as its high cutoff frequency makes it an efficient switch.

In conclusion, the BUL89 transistor is a versatile single, bipolar junction transistor (BJT) used in a variety of applications. It has a current gain of approximately 40, and a high breakdown voltage of 150 volts. Its primary uses include audio amplifiers, preamplifiers, switching circuits, power supply and power amplification circuits, and speed control circuits.

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