Complete version of chip resistor resistance comparison table

In the design and maintenance of electronic components,Chip resistorIt is widely used because of its small size and stable performance. Learn about patchesresistanceThe resistance value comparison table is of great significance for the correct selection and identification of resistor resistance values. This article will introduce you to the complete version of the resistance value comparison table of chip resistors in detail to help electronic engineers and enthusiasts better master relevant knowledge.

1. Basic concepts of chip resistors

Chip resistors (SMD resistors) are surface mount devices that usually appear in standard sizes such as 0603, 0805, and 1206. The resistance value is identified by a nominal code. Common identification methods include three-digit and four-digit codes. Understanding these codes is the first step in identifying a resistor's value.

2. Resistance identification with three-digit code

For small size chip resistors, a three-digit identification method is commonly used. The first two digits represent significant figures, and the third digit represents the power of 10 to which the number is multiplied. For example, "103" means 10×10^3=10kΩ, and "472" means 47×10^2=4.7kΩ. This method is simple and intuitive and suitable for most resistance ranges.

3. Application of four-digit code

The four-digit code is mostly used for precision chip resistors. The first three digits represent significant figures, and the fourth digit is the multiplier. For example, "1000" means 100×10^0=100Ω, and "4992" means 499×10^2=49.9kΩ. The four-digit code can express more precise resistance values ​​and is suitable for high-precision circuit design.

4. Standard resistance series and their significance

Chip resistors usually use E series standard resistance values, such as E12, E24, E48, etc. The E12 series contains 12 resistance values ​​and is suitable for general use; the E24 series has 24 resistance values ​​and has higher precision; the E48 and above series are used for high precision requirements. Understanding these standards can help with proper resistor selection.

5. Structure of chip resistor resistance comparison table

The complete resistance value comparison table lists the corresponding codes and actual resistance values ​​according to the resistance value, ranging from a few ohms to megohms. The table also includes error range and power level information for engineers to quickly find and confirm.

6. How to select a resistor based on the resistance value comparison table

When choosing chip resistors, you need to select the appropriate resistance value and power level according to the circuit design requirements. Use the comparison table to confirm the resistance value corresponding to the nominal code to avoid abnormal circuit operation due to misreading the code. Parameters such as error and temperature coefficient are also considered.

7. Examples of common chip resistor values

Common resistance values ​​such as 1Ω, 10Ω, 100Ω, 1kΩ, 10kΩ, 100kΩ, etc. correspond to different codes. For example, 1kΩ is often "102", 10kΩ is "103", and 100kΩ is "104". Being familiar with these common resistance codes will help you quickly identify and replace components.

8. Precautions for measuring chip resistor resistance

When measuring the resistance of a chip resistor, a multimeter with higher accuracy or a special resistance tester should be used to avoid reading deviations caused by poor contact of the test instrument or circuit interference. At the same time, the circuit needs to be disconnected during measurement to prevent other components from affecting the measurement results.

The chip resistor resistance comparison table is an indispensable tool in electronic design and maintenance. By mastering the identification methods of three-digit and four-digit digital codes and understanding the standard resistance series and their applications, engineers can accurately select and replace chip resistors to ensure stable operation of the circuit. We hope that the complete comparison table and related knowledge provided in this article can help you complete electronic projects more efficiently.