Through-hole resistors, also known as plug-in resistors, are widely used in electronic circuits for current limiting and circuit protection. These resistors feature an outer layer of metal film or carbon film, with color-coded rings indicating the resistance value. The resistor’s design includes two pins for secure insertion into a circuit, ensuring a fixed resistance value and stable performance.

As current-limiting elements, through-hole resistors play a critical role in controlling current flow and protecting electronic components. Their robust construction makes them ideal for various applications, including prototyping, industrial equipment, and educational projects.