Chip resistor resistance comparison table and detailed explanation of reading methods

With the continuous miniaturization and high performance of electronic products,Chip resistorAs a basic component in electronic components, its applications are becoming more and more widespread. Learn about patchesresistanceThe resistance value comparison table and the correct reading method are particularly important for electronic engineers and electronics enthusiasts. This article will introduce in detail the marking method of chip resistor resistance, the use of resistance value comparison table and specific reading techniques to help you better identify and use chip resistors.

Chip resistor (SMD resistor) is a surface mount component with small size and light weight, suitable for automated production. Its resistance is usually identified by a three- or four-digit code for quick identification. Understanding these identification rules is a prerequisite for correct readings.

There are two common resistance markings for chip resistors: three-digit codes and four-digit codes.

Three-digit code: the first two digits are significant digits, and the third digit is the multiplier. For example, "472" represents 47×10²=4700Ω (4.7kΩ).

Four-digit code: the first three digits are significant digits and the last digit is the multiplier. For example, "1001" represents 100×10¹=1000Ω (1kΩ).

Since the labeling of chip resistors is relatively simple, it is easy for beginners to confuse them. The resistance value comparison table can quickly find the resistance value corresponding to the code to avoid misjudgment. The commonly used resistance value comparison table lists common codes and their corresponding resistance values ​​for easy reference.

The following are several common resistance codes and corresponding resistance values:

100：10×10⁰=10Ω

472：47×10²=4700Ω（4.7kΩ）

103：10×10³=10,000Ω（10kΩ）

1001：100×10¹=1000Ω（1kΩ）

Observe the numerical code on the resistor and distinguish between a three-digit or four-digit code.

Calculate the resistance value according to the code rules.

Pay attention to the unit, usually in Ω. When the value is large, it is expressed in kΩ or MΩ.

For codes with letters, such as "4R7", where "R" represents the decimal point, it means 4.7Ω.

Chip resistors are usually marked with an error range, such as ±1%, ±5%, etc. Error designations are usually represented by letters or color codes. Understanding the error range helps select appropriate resistors and ensure circuit stability.

In actual use, in addition to relying on code judgment, you can also use a multimeter to measure the resistor value for double confirmation. Especially for chip resistors with ambiguous markings or suspected errors, measurement is the most direct and effective method.

贴片电阻有不同尺寸规格（如0402、0603、0805等），不同尺寸对应不同的功率承受能力。一般尺寸越大，功率越高，适用的阻值范围也有所不同，选用时需结合阻值和功率需求。

不同厂家可能标识略有差异，购买时需参考具体厂家的说明书。

贴片电阻外观相似，避免混淆不同阻值的电阻。

注意存储环境，防止受潮导致阻值变化。

贴片电阻作为电子产品中不可或缺的元件，其阻值的正确识别对于电子设计和维修非常关键。通过掌握贴片电阻的阻值标识规则、利用阻值对照表以及掌握准确的读数方法，可以有效避免误判和使用错误，大大提升工作效率和产品质量。希望本文能帮助您更好地理解和应用贴片电阻，成为电子领域的专业人士。