Introduction to 0402 High Precision Resistors

0402 high-precision resistor is a surface mount electronic component widely used in various electronic devices. The following is a detailed introduction to it:

1、 Naming and Specifications
Name: 0402 Precision resistor, where "0402" represents the size specification of the resistor, which is 0.04 inches (about 1.0 mm) in length and 0.02 inches (about 0.5 mm) in width, also known as 0.4mm × 0.2mm. Its thickness is usually 0.15mm or 0.3mm, suitable for high-density installation requirements.
Type: Depending on the usage scenario and material, 0402 precision resistors can be divided into multiple categories, including metal thin film resistors, inorganic patch resistors, organic patch resistors, thick film resistors, etc.
2、 Characteristics and Parameters
High precision: The accuracy of 0402 high-precision resistors can usually reach ± 1% or higher, and some products can even achieve an accuracy of 0.01%, which is one ten thousandth accuracy. This makes it important in various circuits that require precise resistance values.
Superior stability: Due to the use of advanced manufacturing processes and materials, the 0402 high-precision resistor has superior stability, and its resistance value changes very little under different environmental conditions such as temperature and humidity.
Low temperature coefficient: The temperature coefficient is an important parameter for measuring the degree of change in resistance value with temperature. The temperature coefficient of 0402 high-precision resistors is usually very low, which means that the change in resistance value is relatively small when the temperature changes, thus ensuring the stability of the circuit.
Excellent frequency characteristics: The 0402 high-precision resistor can maintain stable performance in high-frequency circuits without significant frequency response distortion.
In addition, the resistance range of 0402 high-precision resistor is wide, usually between 1 Ω and 10M Ω, which can meet the needs of different circuits. Its rated power is generally 1/16 watt, suitable for low-power application scenarios. The working temperature range is usually between -55 ° C and+155 ° C, suitable for the temperature conditions of general electronic devices.

3、 Identification and Naming Rules
Accurate identification and naming of 0402 high-precision resistors are crucial in practical circuit design. Usually, the EIA-96 standard is used for naming, including resistance coding, accuracy coding, temperature coefficient coding, etc. This standardization method helps ensure consistent understanding and effective application of precision resistors.

4、 Application Fields
0402 high-precision resistors are widely used in electronic devices due to their small size, high precision, and good stability. Specifically, it includes:

Smartphones and portable devices: The 0402 chip resistor has a small volume and is suitable for portable devices such as smartphones and tablets, providing good current control and voltage division effects.
Consumer electronics products: including televisions, speakers, smart home devices, etc. 0402 surface mount resistors can effectively control current and ensure the stability of circuits on high-density integrated circuit boards.
Automotive Electronics: In automotive electronic control systems, 0402 surface mount resistors can withstand temperature fluctuations and are suitable for use in modules such as airbags and battery management systems that require high current control.
Industrial and medical equipment: In industrial control systems or precision medical instruments, 0402 high-precision resistors can maintain high stability and support high-precision resistance value control and temperature compensation effects.
5、 Brand and Supplier
There are several well-known electronic component suppliers in the market that provide 0402 high-precision resistors, such as YAGEO and Panasonic. These brands' products have high guarantees in terms of performance, quality, reliability, etc., which can meet the needs of different customers.

In summary, 0402 high-precision resistors play an important role in the electronics industry due to their excellent performance and wide range of applications.