Home
Detailed introduction of CJT pin header
How to choose the size of board to board connector
The Difference between Connector ( Housing & Wafer ) and Terminal
How to improve the product quality of wiring terminal
The introduction of pin header of PCB
What should we pay attention to when choosing a good connector manufacturer
When the connector fails, how to eliminate it
Selection of connector
Connector special metal plating
Three basic property of connector
What are the elements of a high-quality connector
Advantages of gold contacts over tin contacts
Testing in humid environment under temperature cycling conditions
Safety of household and similar electrical appliances
Smart home appliances high-performance connector products and solutions
How to choose automobile harness connector plug?
RAST connectors
What factors will affect the distribution of gold plating layer of connector
What is the development space of round Pin header needle?
Why board to board connectors need to be tested for salt spray
How CJT A2550 membrane switch connector can improve product quality
Parameter explanation of PH connectors
What is the function of SMT connector
What are the ways to check the car harness
Introduction of several common connectors
CJT connectors manufacturer analyzes how to select led connector
We learn about the specification hierarchy of connectors
INSIGHTS FROM CONNECTED MOBILITY
How to deal with connectors in different environments
PCI-E series products of Changjiang connectors
Safe use of connector and connection range of aviation plug
connector sales growth rapidly in the global market
Three basic property of connector
Show Exhibitors
Product Catalog
Original factory models
connectors knowledge
Good press-fit analysis
Connector Guide
UL/SGS Certificate download
Company news
Contact Us
Friendship link

Advantages of gold contacts over tin contacts 

Advantages of gold contacts over tin contacts

There is a contact point in a connector, whether through board to board or line to board connection. The contacts may be small and not easy to see, but these unobtrusive contacts are one of the most important components in any connector. When it comes to contacts, it is necessary to talk about the coating of the contacts, and to deposit another layer of metal on one metal to protect the conductivity of the connector. At present, the coating materials are gold, silver and tin, and gold and tin are commonly used. The corresponding contact points are divided into gold contact and tin contact respectively.
As a precious metal, gold will not react with other materials, and gold will not oxidize or change color in the atmosphere, and it will be durable for a long time in harsh environment, so it is very suitable to contact with the coating layer. Silver plating has the best conductivity, but the chemical properties of silver are unstable, which is easy to produce silver sulfide, thus affecting the contact discoloration, welding and other properties of the contact; general connection Because tin is cheaper and has anti-corrosion function, the texture of tin is relatively soft, which is conducive to the coordination between the plug and socket. However, due to the soft texture, it is easy to wear the electroplating surface after several times of plugging and plugging, resulting in deformation of the contact end and failure to reach the designed contact force.
Therefore, gold contact has the following three advantages:
First, gold plating improves the corrosion resistance of contacts, which means they are more suitable for harsh environments.
Second, this kind of contact is more resistant to plug and pull and is not easy to wear, so in the case of frequent plug-in, gold contact is a better choice.
Thirdly, the contact resistance of gold contact is low. Therefore, compared with tin contact, gold contact has better continuity, so it is absolutely preferred in low voltage circuit (5V and below).
In addition to these basic rules, gold (or palladium nickel) contacts must also be used for the following limitations:
Any type of analog signal (because tin contacts produce line noise)
Any unpaired connector exposed to industrial environment
Any connector whose contact spacing is less than 1 mm due to whisker growth on a pure tin plated, unannealed surface
Gold and tin contacts cannot be used in the same paired connector system. The performance of these two coatings has not been studied in depth, but the difference of standard electrode potential will lead to contact corrosion (gold = + 1.5V, tin = + 0.15v - see the appearance of copper zinc drainage tank), and the reliability will be lost.
Should the connector use gold or tin contacts? If you master these rules, you can't choose the wrong one.


Home  |  Detailed introduction of CJT pin header  |  How to choose the size of board to board connector  |  The Difference between Connector ( Housing & Wafer ) and Terminal  |  How to improve the product quality of wiring terminal  |  The introduction of pin header of PCB  |  What should we pay attention to when choosing a good connector manufacturer  |  When the connector fails, how to eliminate it  |  Selection of connector  |  Connector special metal plating  |  Three basic property of connector  |  What are the elements of a high-quality connector  |  Advantages of gold contacts over tin contacts  |  Testing in humid environment under temperature cycling conditions  |  Safety of household and similar electrical appliances  |  Smart home appliances high-performance connector products and solutions  |  How to choose automobile harness connector plug?  |  RAST connectors  |  What factors will affect the distribution of gold plating layer of connector  |  What is the development space of round Pin header needle?  |  Why board to board connectors need to be tested for salt spray  |  How CJT A2550 membrane switch connector can improve product quality  |  Parameter explanation of PH connectors  |  What is the function of SMT connector  |  What are the ways to check the car harness  |  Introduction of several common connectors  |  CJT connectors manufacturer analyzes how to select led connector  |  We learn about the specification hierarchy of connectors  |  INSIGHTS FROM CONNECTED MOBILITY  |  How to deal with connectors in different environments  |  PCI-E series products of Changjiang connectors  |  Safe use of connector and connection range of aviation plug  |  connector sales growth rapidly in the global market  |  Three basic property of connector  |  Show Exhibitors  |  Product Catalog  |  Original factory models  |  connectors knowledge  |  Good press-fit analysis  |  Connector Guide  |  UL/SGS Certificate download  |  Company news  |  Contact Us  |  Friendship link  |  Sitemap  |  Mobile Version
  English     简体版     繁體版
Powered by DIYTrade.com
HomeContact UsSitemap