The packaging definition of the 4.5X4.5 button switch pin for the SMT touch switch is detailed. There are three types of packaging for the touch switch: bulk manual plug-in, SMT chip packaging, and DIP plug-in tape packaging. Model and Specification: The main specifications of the light touch switch are: environmentally friendly, high-temperature resistant, plug-in side plug-in large/medium/small turtle type light touch switch 2 * 4 light touch switch 3 * 3 light touch four foot light touch switch, which is commonly used in daily products and occupies a relatively large part. The four pins mentioned here refer to the four pins of the lightly touched switch, which means there are two sets of switches. Pressing them down will power on both sets simultaneously, while releasing them will open both sets simultaneously. Some people say these four pins are for the purpose of sturdy circuit board soldering, but this understanding is not wrong. In fact, lightly touching the four foot power switch means that it is the same type of power switch as the commonly used light touch power switch in people's daily life. Gently touching the four foot button switch cannot be locked during the entire application process. However, if people press it once, the data signal of the four corner power switch will undergo a transformation. But it belongs to the electronic component switch under modernization, and belongs to the category of electronic appliances. The so-called four foot light touch switch, which has four legs on the switch, is called a four foot light touch switch. This type of switch is widely used in today's applications, especially in household appliances,