The BD136 transistor is a popular choice among electronics enthusiasts due to its versatility and affordability. In this comprehensive guide, we will take a closer look at this transistor, including its history, uses, and technical specifications.

History of the BD136 Transistor

The BD136 transistor was first introduced in the early 1970s. It was designed as a complement to the BD135 transistor, which was a popular choice for use in audio amplifier circuits. The BD136 was designed to operate in the same circuits as the BD135, but with improved performance characteristics.

Uses of the BD136 Transistor

The BD136 transistor is commonly used in audio amplifier circuits, as well as in power supply and switching circuits. It can also be used in logic circuits, as a switch or amplifier. Due to its low cost and versatility, it is a popular choice for hobbyists and students learning about electronic circuits.

Technical Specifications of the BD136 Transistor

The BD136 transistor is a PNP transistor with a maximum voltage rating of 45 volts and a maximum current rating of 1.5 amperes. It has a maximum power dissipation rating of 12.5 watts and a maximum frequency rating of 100 megahertz. The BD136 transistor has a low collector-to-emitter saturation voltage and a high DC current gain, making it an efficient choice for many types of circuits.

BD136 Transistor in Amplifier Circuits

One of the most common uses of the BD136 transistor is in audio amplifier circuits. It can be used in Class A, Class B, or Class AB amplifier circuits, depending on the specific design requirements. In Class A amplifier circuits, the BD136 transistor is biased so it conducts current throughout the entire cycle of the input signal. This results in a high-quality output signal, but also generates significant heat. In Class B and AB amplifier circuits, the BD136 transistor is biased so it conducts current only for part of the input signal cycle. This reduces heat generation and increases efficiency, but also introduces distortion into the output signal.

BD136 Transistor in Switching Circuits

The BD136 transistor is also commonly used in power supply and switching circuits. In these circuits, the BD136 transistor acts as a switch, turning on and off rapidly to control the flow of current through the circuit. This allows the circuit to regulate its output voltage or current, or to generate a specific waveform such as a pulse or square wave.

Tips for Using the BD136 Transistor

When using the BD136 transistor in any type of circuit, it is important to keep its technical specifications in mind. The maximum voltage and current ratings should never be exceeded, as this can cause the transistor to overheat or fail. The BD136 transistor should also be mounted on a heat sink to dissipate heat effectively. When selecting the appropriate biasing voltage and circuit design, it is important to consider the intended application of the circuit, as well as the performance characteristics of the BD136 transistor.

Conclusion

The BD136 transistor is a versatile and affordable choice for many types of electronic circuits. Its low cost and high performance make it an attractive option for hobbyists, students, and professionals alike. Whether you are working on an audio amplifier circuit, a power supply circuit, or a switching circuit, the BD136 transistor is sure to be a valuable component to consider. By keeping its technical specifications in mind, and by carefully selecting the appropriate circuit design, you can achieve excellent performance and reliability from the BD136 transistor.