Why is it called SOT-23

Firstly, we need to know that the invention of SOT23 packaging was mainly aimed at addressing the shortcomings and problems of traditional packaging methods. Traditional packaging, whether TO-92 or SOT89, has a large size and weight, so miniaturization has become a bottleneck restricting development in some light electronic devices with broad application prospects. To this end, TRR has launched SOT23, which has a length of only 2.9 millimeters and a width of only 1.3 millimeters. In comparison, its size is only about one-third of that of traditional packaging. This miniaturized size provides great convenience for the automated assembly of electronic devices and the application of printed circuit boards. This packaging can also accommodate more pins and output whatever signal is needed.

Meanwhile, the design of the SOT23 package also takes into account convenience of use and manufacturing efficiency. The packaging leads are evenly distributed, can be automatically soldered, and have low cost; At the same time, there are convenient markings that can facilitate the soldering of circuit boards. In the rapid and complex processing and production process, it can also maintain excellent performance without defects, improving the product's service life.

After repeated testing and verification, SOT23 packaging has demonstrated its enormous advantages in miniaturization, reliability, and production efficiency, and has been widely used in electronic product manufacturing. It can be applied in various fields such as microprocessors, high-frequency and low-noise circuits, stabilized power supply circuits, power conversion circuits, etc. The birth of SOT23 packaging is a revolution in the field of electronic technology, providing new ideas for the implementation of electronic robots, smartphones, computers and other electronic products in countries around the world.

So, why is it called SOT23? This doubt has been exposed, and the abbreviation for Small Outline Transformer in English is SOT. And 23 is the ordered numbering of the package, representing the position and number of pins in the SOT packaging. Specifically, for SOT23, it has a different number of pins compared to other types including SOT23-3, SOT23-5, SOT23-6, and has slight differences in naming.

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