Long life tact switch


The life of the touch switch, in addition to the number of operations exceeding the limit, there are cases where the number of operations is not much but does not conform to the initial specification with the increase of the number of years. In consumer products, equipment represented by home game consoles has a large number of operations, so there are mainly requirements on the number of mechanical actions; for industrial machinery, even if the operation is not frequent, it also requires a long durability. In this regard, HUATN's initiatives to extend the durability of tact switches are introduced.
Working environment that affects the durability of the tact switch
After a long period of use, the various parts of the tact switch will change, and the electrical performance will also be affected by the use environment.
Particularly, the influence is a change in the surface of the contact point, and an oxide film may be formed on the surface of the contact point, resulting in poor conduction.
The following are the results of the environmental performance evaluation test * of the Company's basic model A series.
For the silver contacts, evaluation was performed using hydrogen sulfide (H2S) gas, which is a corrosive gas having a large influence.
Test conditions: hydrogen sulfide gas concentration 3ppm temperature 40 ℃ humidity 75% 768 hours
In order to approach the actual use situation, the switch is repeatedly operated once a day.
The initial contact resistance value of the series is less than 100mΩ of the specification. After the test, the contact point surface changes color and the contact resistance increases.

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Long life tact switch

The life of the touch switch, in addition to the number of operations exceeding the limit, there are cases where the number of operations is not much but does not conform to the initial specification with the increase of the number of years. In consumer products, equipment represented by home game consoles has a large number of operations, so there are mainly requirements on the number of mechanical actions; for industrial machinery, even if the operation is not frequent, it also requires a long durability. In this regard, HUATN's initiatives to extend the durability of tact switches are introduced.


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