What are the volume, accuracy, power and other parameters of thick film power resistors

The parameters of thick film power resistors vary depending on the manufacturer, product series, and application requirements. The following is an overview of its volume, accuracy, power, and other parameters:

1、 Volume
The volume of thick film power resistors is usually determined by their packaging size. Common packaging sizes include but are not limited to the following:

Small package: such as 0201, 0402, 0603, etc., these packages are suitable for high-density circuit board layouts and are suitable for applications with limited space.
Medium sized packages such as 0805, 1206, etc. provide larger surface area, which is beneficial for heat dissipation and suitable for applications with high power requirements.
Large scale packaging: For applications that require higher power tolerance, larger sized packaging may be used to accommodate higher current and heat dissipation requirements.
2、 Accuracy
The accuracy of thick film power resistors is usually low, and common accuracy levels include:

± 1%: Suitable for applications that require high precision, such as precision measurement and control systems.
± 5%: This is a common accuracy level for thick film resistors, suitable for general electronic applications.
± 10%: Suitable for applications that do not require high accuracy, such as power circuits and signal conditioning circuits.
It should be noted that the accuracy of thick film resistors is limited by manufacturing processes and material characteristics, and usually cannot reach the high-precision level of thin film resistors or precision resistors.

3、 Power
The power bearing capacity of thick film power resistors is one of their important characteristics. The power level varies due to differences in packaging size and internal structure. Here are some common power levels:

Small package: such as resistors in 0402 package, their power is usually between tens of one watt and hundreds of one watt.
Medium sized packaging: resistors such as 0805 or 1206 packaging may have power levels ranging from a few hundredths of a watt to several watts.
Large scale packaging: For larger sized packaging, the power level may be higher to meet the needs of high-power applications.
In addition, thick film power resistors also have the characteristic of increasing power, that is, they can withstand higher power density compared to conventional power resistors under the same volume and size. This makes thick film power resistors have significant advantages in applications that provide higher power output in limited space.

Other parameters
In addition to volume, accuracy, and power, thick film power resistors may also have the following parameters:

Temperature coefficient: represents the degree to which the resistance value changes with temperature. The temperature coefficient of thick film resistors is usually large and may not be suitable for applications that require high precision and low temperature coefficient.
Noise: Due to the influence of internal glass particles, thick film resistors may generate high current noise. Therefore, careful selection is necessary in circuits that are sensitive to noise.
Packaging type: In addition to common surface mount packaging, thick film resistors may also adopt plug-in packaging or other special packaging forms to meet different application requirements.
In summary, the volume, accuracy, power, and other parameters of thick film power resistors vary depending on the manufacturer, product series, and application requirements. When choosing, comprehensive consideration should be given based on specific application scenarios and requirements.