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What Are The Four Most Common Types Of SMD Inductors?
Nov 27, 2018

What are the four most common types of SMD inductors?

SMD inductors are the most common types of inductors. There are many types of inductors according to different classification methods. If divided according to the manufacturing process, the most common types of SMD inductors are mainly four types. They are wire wound, laminated, braided, and thin-film chip inductors, of which the most common are the wound wire type and stacked type. Let's discuss the four most common types of SMD inductors.

1. Winding type - the most commonly used type of inductor

Winding type inductor.png

Wound-type chip inductors are the products of miniaturization of traditional winding inductors. They mainly include high inductance accuracy, low loss (Q), wide inductance range (mH~H), large allowable current, and strong inherited manufacturing process. , Simple structure, low price, etc. Among them, the ceramic core winding chip inductor is extremely suitable for use in high frequency loop, because it can maintain a stable inductance and a very high Q value. However, the disadvantage of wound-type SMD inductors is that it is difficult to reduce the size. The

2. Stacked type - the most compact type

 compact type inductor.png

The second most common type of SMD inductors is the stacked type, which is manufactured using multi-layer printing technology and lamination process, and is a key product developed in the field of inductance components. Compared with the wound-type chip inductor, it has a smaller size, closed magnetic circuit, integrated structure, high reliability; heat resistance, good solderability; shape and other advantages. Therefore, it is more conducive to the miniaturization of the circuit, will not interfere with the surrounding components, will not be interfered with by nearby components, and is conducive to the high-density components of the installation; suitable for automated surface mount production. However, at the same time, the multilayer chip inductor has a low yield, a high cost, a small inductance, and a low Q value. Therefore, it is only used in some higher-end miniaturized electronic products.

3, thin film type - stable high frequency chip inductor type

stable high frequency chip inductor type.png

Thin film chip inductors have the characteristics of maintaining high Q, high accuracy, high stability, and small volume in the microwave frequency band. Its internal electrodes are concentrated on the same level, the magnetic field distribution is concentrated, and it can ensure that the device parameters after mounting are not changed very much, and exhibits good frequency characteristics above 100 MHz. The

4, woven type - the smallest size of the inductor in the largest chip inductor

largest chip inductor.png

Knit-type chip inductors are characterized by: small size, at 1MHz, the unit volume inductance than other chip inductors, easy to install on the substrate. It is a miniature chip power inductor element.

The four most common types of chip inductors have their own advantages and disadvantages. However, the overall comparison is that wire wound type and stacked type chip inductors are more commonly used. The winding type is characterized by its simple structure and low cost. The most widely used patch inductor.