|
Bimetal contact Rivets
In Bimetal Contacts, a layer of silver alloy forms the contact surface. The rest of the head and the shank are made of copper.
Performance
- Contact surface layer and backing metal are bonded metallurgically. This ensures the electrical and mechanical properties of Bimetal contacts are as good as solid contacts.
- Electrolytic copper provides better thermal and electrical conductivity than silver alloy and copper shank in contacts ensures longer life.
- With increasing silver prices, lower silver content of Bimetal contact allows choice of larger contact than with solid silver contact to get better current rating.
Features
- Contact layer is normally half the thickness of the head. To suit specific requirements, variation on this ratio is possible with in practical limits.
- Contact layer can be made of silver alloys like AgCu 3%, AgCu 8%, AgNi 10%, AgCd 10%, AgCdO 10%. Variations of this alloys can also be offered.
- Contacts can be silver plated if required
Economy
We hold stock of Bimetal contacts as per standard dimensions from 2-9mm. For contacts of other materials and sizes we offer short deliveries as we have modern high speed manufacturing machinery.
Product Description Silver rivet and Ag/Cu Bi-metal rivets
Pure silver has a high level of electrical and thermal conductivity, good plasticity and arc corrosion resistance, as well as a very low contact resistance. It is easily soldered and is the ideal contactor material for continuous, enclosed electric connectors. It is one of the most widely used materials in small capacity and low voltage electrical appliances, such as automatic control switches, thermostats, baking machines, oven, timers, thermal relays, and computers.
AgCu rivets
This contact has good electrical conductivity and its surface is not able to oxidization. The addition of 3-28% copper may remarkably improve the silver's flame resistance. Hence, copper contact material may be used in current strength up to 16A. The addition of copper, especially of high copper content, for example 10%, will greatly reduce material transferring during DC working conditions. It is widely used in AC contactors, relays, electric tool switches, buttons, timers, and other household electrical appliances.
Soup contact rivets
This fine crystal silver contains a 0.12% nickel additive and has a low contact resistance, which is similar to that if pure silver, with out the variable switching times. Its fusion welding and flame resistance is slightly higher than that of pure silver, and under almost equal contact resistance, its strength and heat resistance are higher than that of silver-copper composite contactor. It is suitable for various temperature adjustments of working current <10A
AgNi/Cu bi-metal rivets
In low voltage engineering, this contact is widely used in AC switches as an electrical contact. Its advantages that it may be directly soldered to contact bridges, with out the need for additional solder layers, thus making manufacturing of contactor components simple and economical
AgCdo/Cu bi-metal rivets
This contact includes AgCd010, AgCd012, AgCd015, and this kind of electrical contact has one of the most important material in silver-metal oxide contact materials. The fine Cdo gives the contact special properties. When the temperature is above 900oC, Cdo sublimes, which cools the contactor surface and reduces arc energy and extinguishments. In addition, existence of cadmium oxide will improve the welding resistance of the contactor. Its typical applications includes low voltage contactors, relays, automatic switch flash relays, auxiliary switch series, timers, starters, breakers and leakage protective switches.
|
