Detailed explanation of chip resistor 0805 package size diagram

With the continuous miniaturization and high performance of electronic products,Chip resistorAs an indispensable and important part of electronic components, its packaging size has become the focus of attention during the design and manufacturing process. This article will focus on “PatchresistanceThe topic "0805 package size diagram" is introduced in detail to help readers fully understand the size standards and application points of the 0805 package.

1. Introduction to 0805 package

The 0805 package is the most commonly used specification for chip resistors. Its name comes from the imperial size, which means that the length and width of the resistor are 0.08 inches and 0.05 inches respectively. Converted to metric size, it is approximately 2.0mm×1.25mm. 0805 package is widely used in various electronic equipment due to its moderate size and stable performance.

2. Standard size of 0805 package

1. Length (L): 2.0mm (±0.1mm)

2. Width (W): 1.25mm (±0.1mm)

3. Thickness (H): generally 0.55 mm to 0.65 mm

4. Electrode length: about 0.3 mm to 0.5 mm

These dimensions are based on international electronic component standards (such as IPC-7351) to ensure good compatibility during automated placement and soldering processes.

3. Key elements of 0805 package size diagram

In the dimensional drawing, in addition to the above basic dimensions, you also need to pay attention to the shape and position of the electrode, because this directly affects the pad design and welding quality. The electrodes are usually silver or metallized and need to ensure perfect fit with the PCB pads. In addition, the tolerance range and marking position will be marked on the dimensional drawing to facilitate production and inspection.

4. Advantages of 0805 packaging

1. Moderate size, suitable for circuit board design with limited space.

2. Compatible with a variety of automated placement machines to improve production efficiency.

3. Stable thermal performance, suitable for high frequency and high power applications.

4. Low cost and high cost performance.

These advantages make 0805 the preferred packaging specification for the development of many electronic products.

5. How to correctly read the 0805 package size diagram

When reading dimensional drawings, focus on dimensioning, units and tolerances. General dimensions are in millimeters, and the tolerance range determines the accuracy requirements for manufacturing. In addition, pay attention to the dividing line between electrodes and insulators to avoid errors when designing PCB pads.

6. Application of 0805 package in PCB design

In the PCB design software, the pad size and spacing should be set according to the 0805 package size diagram to ensure that the welding is firm and there is no risk of short circuit. Usually the pad length is slightly larger than the electrode length and the width is slightly wider than the electrode width to improve solder joint reliability.

7. The impact of 0805 package size on the mounting process

The accuracy of dimensions directly affects the nozzle selection and placement accuracy of the placement machine. Excessive errors may result in placement offset or resistor damage. Therefore, making components and PCBs strictly according to the dimensional drawings will help improve the overall manufacturing quality.

8. Common problems and solutions

1. Dimensional errors make mounting difficult: It is recommended to use components that comply with IPC standards.

2. Welding defects caused by unreasonable pad design: The size and shape of the pad should be reasonably adjusted according to the dimensional drawing.

3. Difficulty identifying dimensional drawings: Use professional software to assist viewing and measurement.

Chip resistor 0805 package size diagram is an important basis for electronic design and manufacturing. Understanding its standard size and key elements will help improve the rationality and production efficiency of PCB design. Through the detailed introduction in this article, readers can more accurately grasp the size information of the 0805 package and optimize the design and manufacturing process of electronic products. In the future, with the continuous advancement of electronic technology, mastering the knowledge of various package sizes will become one of the essential skills for electronic engineers.