Answer: 0603, 0805, 1206, 3528, 2835, 5050, 5630, 5730.
Answer analysis: The external dimensions of LED SMD lamp beads are diverse, and the common dimensions include the following:
1. 0603: The conversion to metric is 1608, that is, the length of the LED component is 1.6mm and the width is 0.8mm. This small-sized SMD LED lamp bead is mainly used for fine indicator lights, display backlights and other occasions.
2. 0805: The conversion to metric is 2012, that is, the length of the LED component is 2.0mm and the width is 1.25mm (some say 1.2mm). This size of LED SMD lamp beads is widely used in electronic equipment indicator lights, display backlights, etc.
3. 1206: Although some materials convert it to metric as 3528, the more common description is that 1206 directly indicates its size, that is, the length is about 3.2mm and the width is about 1.6mm. The use of this size of lamp beads is similar to 0603 and 0805, but the brightness and power are improved.
4. 3528: This is the metric name, which directly indicates that the length of the LED component is 3.5mm and the width is 2.8mm. This medium-power SMD LED lamp bead is commonly used in lighting products such as LED light strips, flat lights, and panel lights.
5. 2835: The size is 2.8mm (length) × 3.5mm (width), and there is also a saying that it is 3.5mm × 2.8mm, but the former is more common. This lamp bead is similar to 3528, but the packaging structure and luminous efficiency are improved, and it is more widely used.
6. 5050: The size is 5.0mm × 5.0mm, and the power of a single bead can reach 0.2W and above. It is often used for high-brightness lighting and RGB full-color light strips. Some products, such as 5050RGBW lamp beads, have a low power of 0.3W, and the size may also include height information, such as 5.0mm x 5.0mm x 1.55mm.
7. 5630, 5730: These two sizes of SMD LED lamp beads are slightly larger than 5050, with higher power and superior luminous efficiency, and are suitable for occasions with higher brightness requirements. Specifically, the size of 5730 is 5.7mm×3.0mm, and the power is usually between 0.5-0.6W.
It should be noted that there are many specifications and models of LED SMD lamp beads. In addition to the common sizes mentioned above, there may be other specific sizes of products. In addition, with the continuous advancement of technology and changes in market demand, new sizes and specifications of LED SMD lamp beads are also emerging. Therefore, when choosing LED SMD lamp beads, it is necessary to comprehensively consider factors such as specific application scenarios, light output requirements, and costs.
At the same time, it should also be noted that the size of LED SMD lamp beads may vary slightly due to factors such as production process and packaging method. Therefore, in actual applications, it is recommended to refer to the specification sheet of the specific product or consult the relevant manufacturer to obtain accurate information.