Detailed explanation of chip resistor specification and model comparison table

With the continuous development of electronic products,Chip resistorAs an important part of electronic components, the selection of its specifications and models directly affects the performance and stability of the circuit. Learn about patchesresistanceThe specification and model comparison table is particularly important for electronic engineers and technicians. This article will comprehensively introduce the specifications and models of chip resistors and their corresponding relationships to help readers quickly master relevant knowledge.

Chip resistor (SMD Resistor) is a commonly used resistor in surface mount technology (SMT). It is small in size and easy to install. It is widely used in various electronic equipment. Its specifications and models usually use size and resistance as the main parameters, and the marking method is standardized to facilitate quick identification and selection.

The size specifications of chip resistors are expressed in inches or millimeters. Common ones are 0402 (1.0mm×0.5mm), 0603 (1.6mm×0.8mm), 0805 (2.0mm×1.25mm), 1206 (3.2mm×1.6mm), etc. The difference in size determines the power tolerance and applicable scenarios of the resistor. The larger the size, the higher the power.

The resistance value of a chip resistor is usually represented by a three- or four-digit numerical code. In the three-digit number, the first two digits are significant digits and the third digit is the multiplier. For example, "103" means 10×10^3=10kΩ. Four-digit numbers are more precise and make it easier to distinguish small resistance values. There are also color-coded chip resistors, but they are less commonly used.

Common power levels of chip resistors are 1/16W, 1/10W, 1/8W, 1/4W, etc. The power level determines the maximum power that the resistor can withstand. The selection needs to be determined based on the actual needs of the circuit to avoid resistor damage due to insufficient power.

The accuracy level refers to the allowable deviation of the resistor value. Common ones include ±1%, ±5%, ±10%, etc. The higher the accuracy, the closer the resistance value is to the nominal value. High-precision chip resistors are mostly used in circuits that require strict resistance values, such as measuring instruments and high-frequency communication equipment.

The temperature coefficient represents the degree to which the resistance value changes with temperature and is expressed in ppm/°C. The lower the temperature coefficient of the chip resistor, the more stable its performance. Different application environments require resistors with different temperature coefficients, especially electronic products used in high or low temperature environments.

| Dimensions | Dimensions (mm) | Power | Common resistance ranges | Accuracy | Remarks |

| -------| --------| ---| -----------| ---| ---|

| 0402 | 1.0×0.5 | 1/16W| 1Ω~1MΩ | ±1% | Suitable for high-density boards |

| 0603 | 1.6×0.8 | 1/10W| 0.1Ω~10MΩ | ±1% | Common specifications |

| 0805 | 2.0×1.25 | 1/8W | 0.1Ω~10MΩ | ±5% | Slightly larger power |

| 1206 | 3.2×1.6 | 1/4W | 0.1Ω~10MΩ | ±5% | Suitable for higher power circuits |

When purchasing, you need to choose the appropriate size, power and accuracy according to the circuit design requirements to avoid circuit failures caused by inconsistent specifications. At the same time, you should choose a brand with reliable quality to ensure the stability and life of the resistor.

The chip resistor specification and model comparison table is an indispensable reference tool in electronic design and production. By understanding parameters such as size specifications, resistance value markings, power levels, accuracy, and temperature coefficients, you can accurately select suitable chip resistors to improve the performance and reliability of electronic products. I hope the introduction in this article can provide valuable help for your electronic design work.