Four-foot key switch specifications and models
Under different conditions or different environments, the four-pin key switches used will be different or different. This requires a fairly familiar grasp of the specifications and models of different series. The main specifications of the four-foot key switch are side-plug type, patch type, plug-in type, etc. In addition, there are 8*8 series waterproof switches, 6*6 series waterproof switches, 10*10 series waterproof switches and 12*12 series waterproof switches. Four-legged key switches of different specifications have different model series. For example, 6*6*5.5/12/10/13/4.3/17/21/26mm and other four-pin key switches.
The working principle of this switch is actually similar to that of an ordinary button switch. It is composed of a normally open contact and a normally closed contact. When the open contact is pressed, the circuit is turned on; when the pressure is removed, the original normally closed contact is restored, which is the so-called disconnection. This pressing force is the action of using our hands to turn the button on and off. All in all, the working principle of the four-foot key switch is still well understood.
Four-foot key switch selection method
The quality of the switch will directly affect the use of the product. Therefore, when choosing a four-pin button switch, pay attention to its physical properties such as solderability, protection, and conduction. The service life is long and the touch is rough. These external surface factors will also determine the four-pin button. Switch pros and cons. In order to reduce the resistance, the pins will be silver-plated, so the high-quality four-pin key switch should control the thickness and process of silver plating on the pins. The final silver plating is more than 0.3um, and the thin silver is 0.2 um, 0.1um is white plated. After the four-legged key switch is silver-plated, whether its protection has the function of waterproof and dustproof, otherwise, no matter how good the silver-plated treatment is, it will also be oxidized by the air!