With the continuous development of electronic products,Chip resistorAs a basic component in electronic components, it is widely used in various circuit designs. patchresistanceNot only is it small in size and stable in performance, it is also convenient for automated production. In order to easily identify the resistance value of chip resistors, manufacturers usually perform silk-screen markings on the surface of the resistor. This article will introduce in detail the screen-printed resistance value comparison table of chip resistors to help electronic engineers and maintenance personnel quickly and accurately identify resistor values.
1. Basic concepts of chip resistorsA chip resistor, also known as a surface mount resistor, is a resistor mounted via surface mount technology (SMT). They have a wide range of resistance values, ranging from a few ohms to several megaohms. Due to their small size, chip resistors are widely used in electronic equipment such as mobile phones, computers, and home appliances.
2. The importance of silk screen resistance markingDue to the small size of chip resistors, it is very limited to directly mark the resistance value with numbers, so a silk screen code is used to mark the resistance value. Silk screen resistance marking not only facilitates quick identification, but also avoids the problem of unclear marking due to volume limitations.
3. Common silk screen resistance marking rulesThe silk screen resistance value of chip resistors is usually represented by a three-digit or four-digit numerical code:
Three-digit code: the first two digits represent the number, and the third digit represents the power multiplied by 10. For example, "103" means 10×10^3=10kΩ.
Four-digit code: the first three digits represent the number, and the fourth digit represents the power of 10 multiplied to. For example, "1001" means 100×10^1=1kΩ.
In addition, some high-precision resistors will directly mark the resistance value, such as "0R5" indicating 0.5Ω.
4. Examples of commonly used chip resistor value comparison tables| Silk screen code | Resistance value | Unit |
| -------| ----------| -----|
| 000 | 0Ω | Oh |
| 101 | 100Ω | Oh |
| 472 | 4.7kΩ | kΩ |
| 103 | 10kΩ | kΩ |
| 224 | 220kΩ | kΩ |
| 105 | 1MΩ | MΩ |
5. How to identify special resistance markingsIn addition to the numerical code, some chip resistors use letters instead of numbers, or use "R" to represent resistance values less than 1Ω, such as "R47" for 0.47Ω. Additionally, precision resistors may have additional tolerances and power designations.
6. How to use the silk screen resistance comparison table to choose chip resistorsWhen engineers design circuits, they can quickly judge the resistance value based on the silk-screen resistance comparison table to ensure the correct selection of components. When purchasing, component errors caused by misreading silk screen codes can also be avoided.
7. Common misunderstandings and precautionsThere may be differences in the silk screen logos of different manufacturers, which need to be confirmed with the specific model and specifications.
When the silk screen is worn or unclear, it is recommended to use a multimeter to measure the resistance.
Pay attention to distinguishing resistance units to avoid misjudgment.
The screen-printed resistance value comparison table of chip resistors is an important tool in the field of electronic engineering, helping users quickly and accurately identify resistor values. Understanding silk screen marking rules and common codes will help improve work efficiency and reduce error rates. In practical applications, the combination of specifications and measurement tools can ensure the correct selection and maintenance of chip resistors. I hope this article will help you understand and use the silk screen resistance of chip resistors.
