With the development of SMT chip technology towards miniaturization and high efficiency, various commonly used components are getting smaller and smaller. Therefore, the commonly used chip resistors, chip inductors, and chip capacitors have also become difficult to distinguish in appearance. So, how to distinguish the commonly used SMT components? Let’s take a look at the following Sanjing:

(1) The difference between chip inductance and chip resistance

1. Judging by the shape: the shape of the inductor is polygonal, and the resistance is basically rectangular. When the shape of the component to be distinguished has a polygonal shape, especially a circular shape, it is generally judged as an inductance.

2. Measure the resistance value: the resistance value of the inductor is relatively small, and the resistance value of the resistor is relatively large.

(2) The distinction between chip capacitors and chip resistors

1. Look at the color: chip capacitors are mostly gray, cyan, light yellow, and some have no printing on them, mainly because they are sintered at high temperature, which makes it impossible to print on their surface.

2. Look at the logo: the symbol of the chip capacitor in the circuit is "C", and the symbol of the chip resistor is "R".

3. Measurement method: Generally, the resistance of the chip capacitor is very large, while the chip resistance is relatively small. SMD capacitors have charging and discharging phenomena, while SMD resistors do not.

(3) The difference between chip inductors and chip capacitors

1. Look at the color: generally black is a chip inductor, chip capacitors are only black for chip tantalum capacitors used in precision equipment, and other ordinary chip capacitors are basically not black.

2. Look at the model code: SMD inductors start with L, and SMD capacitors start with C. A circular shape can be preliminarily judged as an inductance. If the resistance at both ends of the measurement is a few tenths of an ohm, it is an inductance.

3. Detection: chip inductors generally have a small resistance value, and there will be no back and forth deflection of the multimeter pointer due to charging and discharging, and the chip capacitors are charged and discharged.

4. Look at the internal structure: you can find the same components and open the components to see the internal structure. The coil structure is the chip inductor.

In addition to the above distinction methods, as long as you are familiar with the functions and models of various components, you can quickly distinguish various components with similar appearances.

The above is about how to distinguish the commonly used SMT components, I hope it can be helpful to everyone!