What are the parameter ranges of 0402 precision resistors

The parameter range of 0402 precision resistor mainly includes resistance value, accuracy, temperature coefficient, rated power, and operating temperature range. The following is a detailed summary of these parameter ranges:

1、 Resistance range
The resistance range of 0402 precision resistors is usually between 1 Ω (ohm) and 10M Ω (megaohm). Specifically, it may cover a wide range from 10R (i.e. 10 ohms) to several hundred kiloohms. Products from different manufacturers and series may have different resistance ranges, so in practical applications, it is necessary to choose the appropriate resistance value according to specific needs.

2、 Accuracy range
Accuracy is an important indicator for measuring the accuracy of resistance values. The accuracy range of 0402 precision resistors is usually within ± 0.5%, and some high-precision products can even achieve an accuracy of 0.01%. For resistors with a resistance of over 1 Ω, an error within ± 0.5% belongs to the high-precision category; For resistors with resistance values below 1 Ω, achieving an accuracy of ± 1% is considered a precision resistor. The selection of accuracy should be determined based on the specific requirements of the circuit.

3、 Temperature coefficient range
The temperature coefficient is an important parameter for measuring the degree of change in resistance value with temperature. The temperature coefficient of 0402 precision resistors is usually very low, typically between ± 50ppm/℃ (ppm represents parts per million) or ± 100 to ± 200ppm/℃. This means that the change in resistance value is relatively small when the temperature changes, thereby ensuring the stability of the circuit. The specific value of the temperature coefficient depends on the material and manufacturing process of the resistor.

4、 Rated power range
Rated power refers to the maximum power that a resistor can withstand under normal operating conditions. The rated power of 0402 precision resistors is usually 1/16 watt (W), suitable for low-power application scenarios. When selecting a resistor, it should be ensured that the rated power of the selected resistor is greater than or equal to the actual power demand in the circuit to prevent overheating and damage to the resistor.

5、 Working temperature range
The working temperature range refers to the temperature range within which the resistor can operate normally. The working temperature range of 0402 precision resistor is usually between -55 ° C and+155 ° C, suitable for the temperature conditions of general electronic devices. In special application environments, it may be necessary to choose resistors with a wider operating temperature range to meet the requirements.

In summary, the parameter range of 0402 precision resistor covers multiple aspects such as resistance value, accuracy, temperature coefficient, rated power, and operating temperature range. When selecting and using, appropriate parameter combinations should be chosen according to specific needs to ensure the stability and reliability of the circuit.