What is a unipolar transistor? The basic structure, working principle, classification, advantages, causes of faults, and maintenance methods of unipolar transistors 1

A single pole transistor, also known as a single pole transistor, is a semiconductor device primarily used for amplifying electrical signals and controlling current in electronic components. The RB521S30T1G unipolar transistor is one of the most important devices in modern electronic technology, widely used in fields such as amplifiers, switches, and logic circuits.

1、 Basic structure:

A unipolar transistor consists of three main parts: a control electrode (Gate), a drain electrode (Drain), and a source electrode (Source). The control electrode controls the current flow between the drain and source by controlling the voltage. A PN junction is formed between the control electrode and the source electrode to control the flow of current. The current between the drain and source is influenced by the voltage and current of the control electrode.

2、 Working principle:

The working principle of a unipolar transistor is based on the characteristics of the PN junction. When the PN junction is forward biased, i.e. the P region is connected to a positive voltage and the N region is connected to a negative voltage, electrons diffuse from the N region to the P region, while holes diffuse from the P region to the N region. This diffusion process leads to the recombination of electrons and holes in the PN junction region, forming a current. When the PN junction is reverse biased, i.e. the P region is connected to a negative voltage and the N region is connected to a positive voltage, electrons and holes cannot recombine, resulting in the inability of current to pass through the PN junction.