Inductors (SMD)Surface-mount device (SMD) inductors are a type of electronic component that is used in a variety of electronic circuits and systems. Inductors are passive electronic components that are used to store energy in the form of a magnetic field, and are commonly used in circuits to filter signals, provide impedance matching, or perform other functions. SMD inductors are designed to be mounted directly onto a printed circuit board (PCB) using surface-mount technology (SMT), rather than being inserted into through-hole holes in the PCB. This allows for a high density of components to be placed on the PCB, making SMD inductors well-suited for use in compact, high-density electronic systems.