Like capacitors, inductors are energy storage components that convert electrical energy into magnetic field energy and store energy in the magnetic field. They often work with capacitors to form LC filters, LC oscillators, and other circuits. Additionally, inductors are used to manufacture chokes, transformers, relays, and other devices due to their specific characteristics. Inductors block AC current while allowing DC current to pass through, which is the opposite behavior of capacitors. When selecting an inductor, you should first consider whether its performance parameters (such as inductance, rated current, quality factor, etc.) and external dimensions meet your requirements. Small fixed inductors and color-coded inductors can be directly substituted as long as the inductance, rated current, and external dimensions are similar. When installing, pay attention to the relative positions of inductor components. Generally, the axes of inductor coils that are close to each other should be perpendicular to each other to minimize interference.