Screen printing list of chip resistor components

With the continuous development of electronic products,Chip resistorAs one of the most common components in electronic circuits, its marking methods are increasingly standardized and diversified. To facilitate engineers and technicians to quickly identify patchesresistanceresistance and specifications, silk screen codes have become an indispensable means of identification. This article will introduce in detail the screen printing list of chip resistor components to help readers fully understand the various screen printing codes and their corresponding resistance value meanings.

Chip resistor silk screen printing refers to the printing mark that uses a specific combination of letters and numbers on the surface of the chip resistor to identify the resistance value and tolerance of the chip. Due to the small size of chip resistors, it is difficult to directly mark the complete resistance value, so a simplified code form is used. Common screen printing methods include three-digit codes, EIA-96 codes, and letter codes.

This is the most common way to identify the resistance value of chip resistors, usually consisting of two significant figures and one multiplier. The first two digits represent significant figures, and the third digit represents the power of 10. For example, a chip resistor marked "103" means 10×10^3=10kΩ, and "472" means 47×10^2=4.7kΩ. This method is simple and intuitive, suitable for mostLow value resistor。

EIA-96 is a marking method for precision resistors, which uses a combination of two digits and one letter to represent the resistance value. The two digits are the serial number in the code table, and the letters represent the multiplier. This code is suitable for precision resistors with resistances between 1Ω and 1MΩ, with an accuracy of typically 1%. For example, code "01C" corresponds to 100Ω, and "25B" corresponds to 178Ω. The EIA-96 code needs to be used with a lookup table and is suitable for high-precision applications.

Some chip resistors use letters to represent resistance values ​​or special properties. For example, "R" represents the decimal point position, such as "4R7" represents 4.7Ω. In addition, letters are also used to indicate resistance tolerances, such as "J" representing ±5% and "K" representing ±10%. This type of code facilitates quick identification of resistor characteristics and is widely used in industrial design.

For chip resistors with unconventional resistance values ​​or special purposes, customized silk screen codes are sometimes used, such as "000" representing a zero-ohm resistor (also called a jumper resistor), while "999" may represent an open circuit or no resistor used. Designers need to confirm the meaning of these special marks according to specific product instructions.

The key to identifying chip resistor screen printing is to be familiar with the meaning of different codes and consult the corresponding comparison table. Engineers usually prepare standard silk screen comparison tables, use a magnifying glass or microscope to observe component markings, and use the code table to determine resistance values ​​and tolerances. In addition, there are also specialized identification tools and software on the market to assist in identification.

Since chip resistors are extremely small, the silk screen may be worn or blurred due to the production process or usage environment, making identification difficult. Therefore, when purchasing and using, you should pay attention to the quality and storage environment of the components to prevent the logo from falling off. At the same time, the resistance value should be confirmed based on the circuit diagram and actual measuring instruments to ensure normal operation of the circuit.

The silk screen code of chip resistor components is an important means to quickly identify resistance values ​​and parameters in electronic engineering. By understanding the meaning of three-digit codes, EIA-96 codes, letter codes and special markings, engineers can efficiently and accurately select and detect chip resistors. With the development of electronic manufacturing technology, silk screen printing methods have also been continuously improved. Understanding and skillfully using these marks is of great significance to improving the efficiency of electronic design and maintenance. We hope that the screen printing list of chip resistors in this article can provide a practical reference for the majority of electronic practitioners.