Contacts are as important to switches as safety is to our lives.

The first thing is this. Many companies produce switches, their contacts are basically a layer of silver up, I believe you also have some understanding. Because this has already reached the contact problem.

But many of our friends may not carefully consider, in fact, it is only a thin layer of silver, facing our switch on and off, is in a very dangerous state, they are always ready to be worn off oh

So now many companies are already considering how to improve the safety of our switches, as well as extend the service life of it

Now there is a product called silver nickel alloy. The advantages of this metal are:

Low resistivity (don't look at our switch, it seems not to use electricity, in fact, it will use electricity) good electrical conductivity, welding resistance and arc erosion resistance excellent stability. Long service life, etc. Therefore, the current margin of the 10A switch is greatly improved.

Therefore, generally good companies will use silver nickel alloy as the best choice of contacts. And we can obviously see that there is a clear difference between good contacts and bad contacts, that is the sound.

The sound of silver-nickel alloys is crisp but loud. But there are some bad is the sound is not loud oh.

So we see that the price of good pies is very expensive, of course, there is a reason for him.

Do you think how can there be some bad low-end products that have not been used for 5 years?

But the good ones are guaranteed for at least 10 years. Some can even last 30-40 years without breaking down.

The advantages of contactless switches in electromagnetic compatibility, reliability, safety and other aspects are incomparable to contact switches. The contactless switch is controlled by thyristor, so it is in the PN junction to complete the conduction and closure, there will be no sparks, make up for the lack of sparks when the contact switch compound, to avoid the spark due to excessive current or breakdown of air in the high voltage circuit, resulting in misoperation. The high voltage resistance of the contactless switch is also very good, such as some large motors when starting, because the rotor from static to rotation inertia is very large, resulting in a large starting current (basically quite short circuit current), when the inertia continues to operate, it will cause a very high voltage, and the contactless switch can be applied to this.