SMD Chip Inductor

A chip inductor, also known as a surface-mount inductor (SMD inductor), is an electronic component packaged using surface-mount technology (SMT) that can be mounted directly onto the surface of a printed circuit board (PCB). It consists of a magnetic core, enameled copper wire, and an insulating encapsulation layer, with some models also equipped with a magnetic shield. Its core function is to achieve energy storage, filtering, choking, signal coupling, and high-frequency interference suppression based on the principle of electromagnetic induction, making it one of the fundamental components enabling device miniaturization and high-density layout in electronic systems. Among the various types, wire-wound and multilayer chip inductors are the most commonly used: wire-wound chip inductors are made by winding insulated copper wire around a magnetic core, offering a wide inductance range, high precision, and high Q factor, making them suitable for low-to-medium frequency and high-power applications; multilayer chip inductors are manufactured using multilayer printing and lamination processes, featuring smaller size and good magnetic shielding, making them ideal for high-frequency and miniaturized applications; thin-film chip inductors are suitable for microwave frequency bands, offering high Q factor and high precision.

The chip inductor features standardized packaging, such as conventional EFD15 and EFD25, which are supplied in tape-and-reel packaging for compatibility with SMT automated placement, enabling high production throughput.

In addition, the product range is comprehensive, covering inductance values from microhenry (μH) to millihenry (mH) and power levels suitable for low-frequency to medium-frequency as well as high-frequency applications.