Transistors are discrete semiconductor devices used to control the flow of electrical current. They function primarily as electronic switches or signal-controlling elements by regulating conduction between their terminals under the influence of an input signal.

Within the Discrete Semiconductors category, transistors are provided as individual components and are commonly grouped by their underlying device structure and operating principle.

• Bipolar Junction Transistors (BJTs): Current-controlled devices based on carrier injection and amplification effects.
• Field-Effect Transistors (FETs): Voltage-controlled devices that modulate conduction through an electric field.

Transistors are fundamental building blocks in electronic circuit design, enabling controlled current handling and signal manipulation at the component level.