Diodes, Transistors & Thyristors

Diodes and transistors are fundamental components in electronic circuits, playing crucial roles in controlling the flow of electrical current.

Diodes:
A diode is a two-terminal electronic component that allows current to flow in one direction only. It is made of a semiconductor material, typically silicon or germanium.

- Function: Diodes are used to rectify alternating current (AC) to direct current (DC), as in power supplies. They also serve as signal rectifiers, voltage regulators, and in various protective circuits to prevent reverse current flow.

- Applications: They are found in power supplies, signal processing circuits, LED lighting, and as protective elements in electronic devices.

- Selection Criteria: When choosing a diode, consider the forward voltage drop, current rating, power rating, and the type of diode (e.g., rectifier, Zener, Schottky) based on the specific application.

Transistors:
A transistor is a three-terminal device used to amplify or switch electronic signals and electrical power. It is also made from semiconductor materials.

- Function: Transistors can amplify weak input signals to produce stronger output signals or act as switches to control the flow of current in a circuit.

- Applications: They are used in amplifiers, switches, digital logic circuits, and as the building blocks of integrated circuits in computers, smartphones, and other electronic devices.

- Selection Criteria: Key factors in selecting a transistor include its type (bipolar junction transistor (BJT) or field-effect transistor (FET)), gain (for amplification), current and power handling capabilities, and switching speed.

In summary, diodes and transistors are essential for controlling and managing electrical signals and power in a wide range of electronic devices. Their selection is based on the specific requirements of the circuit design, such as current and voltage ratings, operating frequency, and the desired level of amplification or switching speed.
Please refer to the product rule book for details.