SMD/SMT Newest Tactile Switches, Surface Mount PCB Tact Switch

Tactile Switches 6 x 6 mm, 5 mm Act Height, 260 gf, Black, Surface Mount, SPST, Surface-mount tact switches measuring 3.5mm x 2.6mm with a life expectancy of up to 500,000 cycles.

Tactile switch 6*6/4*4/3*6/2*4/4.5*4.5/12*12 membrane switch waterproof switch

MD SMT Newest Tactile Switches, Surface Mount PCB Tact Switch

12 Values Tactile Push Button Switch Micro Momentary Tact Switch Assortment Kit

Tactile Surface Mount, PCB Tact Switch

The main specifications of tact switches are: environmentally friendly and high temperature resistant tact switches; SMD tact switches; plug-in tact switches; side plug-in tact switches; large/medium/small turtle-shaped tact switches; 2*4 tact switches; 3*3 tact switches; 3.7*3.7*0.3 imported tact switches; 4*4*1.5/1.6/17mm tact switches; 3*6*4.3/5.0mm automotive tact switches; 4*6*2.6 tact switch; 4.5*4.5*3.8/4.8/5/0/6/7/8/9 SMD tact switch; plug-in tact switch; side three-solution tact switch; 6*6*4.3/5.0/5.5/6/7/8/9/9.5/10/11/12/13/14/15/16/17/18/19/20/21/26mm tact switch; SMD tact switch; plug-in tact switch; 6.2*6.2*2.5/2.7/3.1/3.4 tact switch; 12*12*4.3/5.0/5.5/6/7/8/9/10/11/12/13/14/15/16/17/18/19/20/21/22/23mm tact switch. 6*6 series waterproof touch switch; 8*8 series waterproof touch switch; 10*10 series waterproof touch switch; 12*12 series waterproof touch switch.

Factors affecting the quality of touch switches: mainly determined by the protection, solderability, conduction reliability, life, feel, production process and installation size of the touch switch.

1. Pin substrate: The pin substrate of the touch switch is brass or phosphor copper (low-grade iron). In order to reduce the contact resistance, the pin is basically silver-plated, because silver will oxidize when it encounters SO2 gas in the air, which directly affects the solderability and contact resistance of the switch. Therefore, high-quality touch switches must first control the silver plating thickness and silver plating process of the pin substrate. The order of silver plating in the market is as follows:

Silver plating thickness: above 0.3um (post-silver), 0.2um (thin silver), 0.1um (white plating).
Silver plating process: substrate pre-nickel plating and then silver plating, substrate pre-copper plating and then silver plating, substrate direct silver plating.
It is very important whether the substrate is treated with a protective agent after silver plating or whether the switch has dust and water resistance. Otherwise, even with the best silver plating, the switch will be oxidized.

2. The key factor affecting the conduction reliability is the structure of the contact point. Because the function of the touch switch is to make the contact point and the spring contact and conduct, the larger the contact surface of the contact point, the better. The contact surface is determined by the structure. There are roughly three types of structures on the market, and the order of advantages and disadvantages is as follows: “O-type contact”, “slotted contact”, “flat bubble contact”.

3. Life and feel: Life and feel are determined by the stroke of the touch switch and the coordination of the spring. The shorter the stroke, the lighter the sound and the longer the life, and the longer the stroke, the opposite. Under the condition of fixed spring technology, the life of the touch switch is mainly determined by the stroke or sound. In addition, the key factor that determines the life of the spring is still the stamping technology. The stamping technology of Japan and Taiwan is now very popular in China. Therefore, under the condition of technological improvement, the requirements for materials are whether imported materials are reduced. For example, there are four main types of 160gf shrapnel life in the market: about 50,000 times (domestic phosphor copper or relatively backward stamping technology), about 100,000 times, more than 200,000 times (stainless steel), and 300,000 times.

4. Production process: After having accessories, the final factor that affects the quality is the assembly process, which depends on factors such as the management ability of the production company, the quality intention of employees, and the quality assurance ability. The quality of the final product with different assurance capabilities is definitely different. Now the market assembly methods include manual and machine. Because the current automation capabilities are still being improved, each has its advantages and disadvantages: the cost of machine assembly is low but the product quality is low, and the cost of manual assembly is high but the quality is also high.

5. Factory inspection: The methods and items of factory inspection also affect the quality of the final touch switch. For example, whether the appearance, feel, conduction, resistance and other items are sampled or fully inspected. For example, the scrap rate required by some large factories is measured by PPM or zero defects. It is necessary to set up sampling inspection or quality inspection after setting up full inspection in factory inspection.