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.

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.

1. Length (L): 2.0mm (±0.1mm)

2. Width (W): 1.25mm (±0.1mm)

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

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.

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.

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.

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.

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.

尺寸的准确性直接影响贴装机的吸嘴选择和贴装精度。误差过大可能导致贴装偏移或电阻损坏。因此，严格按照尺寸图制作元件和PCB，有助于提升整体制造质量。

1. 尺寸误差导致贴装困难：建议选用符合IPC标准的元件。

2. 焊盘设计不合理引起焊接缺陷：应根据尺寸图合理调整焊盘大小和形状。

3. 识别尺寸图困难：利用专业软件辅助查看和测量。

贴片电阻0805封装尺寸图是电子设计和制造的重要基础，了解其标准尺寸和关键要素，有助于提升PCB设计的合理性和生产效率。通过本文的详细介绍，读者可以更准确地掌握0805封装的尺寸信息，优化电子产品的设计与制造流程。未来，随着电子技术的不断进步，掌握各类封装尺寸的知识将成为电子工程师必备的技能之一。