A chip resistor is a surface-mount resistive component that is commonly used in the assembly of circuit boards. The identification of chip resistors and their models is primarily dependent on the identification on the resistor body. Here are some key information about chip resistor identification and model number:
Identification method: The identification of chip resistors usually uses numbers or letters** to indicate their resistance, accuracy, and other characteristics. A common identification method is the direct annotation method, in which information such as resistance value and accuracy is directly printed on the resistor body.
Resistance Identification: The resistance of a chip resistor is usually represented by a three- or four-digit number**. For example, the number ** "103" means that the resistance is 10,000 ohms (i.e., 10 thousand ohms or 10k), while "472" means that the resistance is 4,700 ohms (i.e., 4.).7kω）。If there is a decimal point in the number, the number after the decimal point indicates the number of zeros.
Accuracy Class: The accuracy class of a chip resistor indicates the tolerance range of its resistance value. Common accuracy classes are 1%, 2%, 5%, etc. The accuracy level is usually represented by a single letter, such as "j" for 5%, "k" for 10%, and "m" for 20%.
Size and package: The size and package type of the chip resistor are also important factors in identifying its model. Common package types are the following, and these numbers indicate the length and width of the resistor, in inches.
Manufacturer information: Some chip resistors will also be marked with the manufacturer's information, such as the manufacturer's logo, production batch number, etc. This information can help trace the quality and quality of the resistor.
It is important to note that different manufacturers may have different marking methods and systems, so it is best to refer to the relevant manufacturer data sheet or spec sheet when identifying chip resistors.
When identifying the model of a chip resistor, it is usually necessary to make a comprehensive judgment based on the above information. For example, a chip resistor labeled "100k 1%" indicates that it has a resistance value of 100,000 ohms (i.e., 100k) and an accuracy class of 1%. At the same time, it is also necessary to pay attention to other characteristics such as the power rating and temperature coefficient of the chip resistor to ensure that it meets the requirements of the circuit design.
In conclusion, the correct identification of chip resistors and their models is critical for circuit design and assembly. By understanding common marking methods and systems, combined with the data sheets provided by the manufacturer, it is possible to more accurately identify and apply chip resistors.