Special Features of Dip Switches？

The use of dial SWITCHes is a relatively common type of Switch, its use we also have to pay attention to a lot of contact points, the first is the material, in the selection of the time we should try to choose the right one, the following we will talk about what is special about the issue of the dial switch contact points?

Contacts at this stage there are three key, silver nickel-based alloy, silver cadmium aluminium alloy and pure silver. Silver nickel-based alloy is more idealised at this stage of the contact raw materials, conductivity, strength is better, but also not easy to oxidation corrosion. Silver

cadmium aluminium alloy contacts other levels are also better, but that is to say that the cadmium element belongs to the metal cadmium, on the one hand, harmful to the body, on the other hand, and the combination of silver are not idealised, will produce cadmium metal material in the contact surface small particles, conductivity will drag out of the electricity alone.

Sterling silver to do contacts actually have problems, conductivity is very good, but pure silver colour is soft, but also very easy to oxidize (like silver jewellery when a long time will be black). Colour soft, power switch more contacts on the deformation; oxidation corrosion, conductivity will be much worse, rust is also very easy to heat, very easy to burn the contacts.