What are the core parameters of 0402 precision resistor

The core parameters of 0402 precision resistor mainly include the following aspects:

1、 Resistance value
Resistance range: The resistance range of 0402 precision resistors is usually between 1 Ω (ohm) and 10M Ω (megaohm), or between 10R (short for 10 ohms) and 205KR (short for 205 kiloohms) or wider, depending on the manufacturer and product series.
Resistance error: Compared with ordinary resistors, precision resistors have smaller resistance error. The resistance error 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 a resistance below 1 Ω, a precision of ± 1% is considered a precision resistor.
2、 Power (Power)
Rated power: The rated power of 0402 precision resistors is usually 1/16 watt (W), suitable for low-power application scenarios.
3、 Temperature Coefficient
Definition: Temperature coefficient is an important parameter for measuring the degree of change in resistance value with temperature.
Numerical range: The temperature coefficient of 0402 precision resistors is usually very low, typically between ± 50ppm/℃ (ppm represents parts per million) or ± 100 to ± 200ppm/℃, depending on the material and manufacturing process.
4、 Stability
Definition: Stability refers to the ability of a resistance value to remain constant over a long period of use or under different environmental conditions.
Characteristics: 0402 precision resistor has superior stability and can maintain stable resistance values under various environmental conditions.
5、 Frequency Characteristic
Definition: Frequency characteristic refers to the variation of resistance value with frequency.
Characteristic: 0402 precision resistor can maintain stable performance in high-frequency circuits without significant frequency response distortion.
6、 Size and Package
Size: The size specification of 0402 precision resistor is 0.4mm × 0.2mm (also known as 0.04 inches × 0.02 inches), and the thickness is usually 0.15mm or 0.3mm.
Packaging: Using surface mount technology (SMT), suitable for high-density installation requirements.
7、 Other parameters
Working voltage: The working voltage of 0402 precision resistor is usually 100V, and the overload voltage can reach 200V.
Working temperature range: usually between -55 ° C and+155 ° C, suitable for temperature conditions of general electronic devices.
In summary, the core parameters of 0402 precision resistor include resistance value, power, temperature coefficient, stability, frequency characteristics, size and packaging, and other related parameters. These parameters collectively determine the performance and application range of 0402 precision resistors. When selecting and using, appropriate parameter combinations should be chosen according to specific needs.