SMD components (Surface Mount Devices) are electrical function parts that use surface mount technology to be soldered to the circuit board. There are many distinct types of SMD components, and each type is packed in a different way, resulting in a large library of SMD components.

We'll go through the many sorts of SMD components that we frequently use in this section.
 

SMD Components Come in a Variety of Shapes and Sizes
 

SMD Resistor codes are classed as follows based on their purpose; the letters in parentheses denote their identification on the PCB.
 

Chip Resistor (R): A chip xxnl resistor's resistance value is shown by the three numbers on its body. The first and second numbers are significant figures, while the third digit signifies a multiple of ten, for example, "103" means "10K," and "472" means "4700." The letter "R" stands for a decimal point, therefore "R15" stands for "0.15".
 

The Network Resistor (RA/RN) is a resistor that combines numerous resistors with the same specifications. In most cases, network resistors are used in digital circuits. The resistance is identified in the same way as a chip resistor.
 

The most common capacitor (C) is MLCC (Multi-layer Ceramic Capacitors). MLCC is categorized into COG (NPO), X7R, and Y5V based on the materials, with COG (NPO) being the most stable. Tantalum and aluminum capacitors are two more types of special capacitors that we utilize; note that the polarity of these two capacitors is different.
 

Widely used SMD components, diode (D). The color ring on the diode body usually indicates the negative direction.
 

Ordinary LEDs and high-brightness LEDs, with colors such as white, red, yellow, and blue, are two types of diode LEDs. The polarity of LEDs should be determined using a specific product production guideline.
 

NPN and PNP are common architectures in LED Transistors (Q), which include Triode, BJT, FET, MOSFET, and others. SOT-23 and SOT-223 are the most often utilized packages in SMD components (larger).