Electric current is one of the most basic terms of electricity. For this reason, although those who have just adapted to the profession often hear it, many electronics do not know what it does. So what is the electric current, and What are the high electric components?

High current refers to lots of electrons moving through a cross-section of conductors per second. That can happen at lower voltages when there is little resistance.

In this article, we will share with you those who are curious about the high current application.


High Current Application     

Connector designers have a wide selection of finishes to consider for high-current applications, both noble as well as non-noble metals. It is essential to evaluate performance as well as cost aspects. Failures of high-current contacts are somewhat distinct from those of signal contacts, which in that case are primarily associated with loss of information. In contrast, the failure of a high-current connection could result in something as catastrophic as a fire.

Silver has the highest value of electrical conductivity of any material; clearly, this is a significant factor when considering the ability of a contact to carry current. Silver is “semi-noble,” in that although oxide formation is mitigated, it is susceptible to the formation of tarnish films. As with noble metals, silver will not degrade as a consequence of fretting corrosion.


An additional attribute associated with silver is its ability to heal itself; That means silver can change the contact interface and improve performance as degradation occurs.

In some circumstances, the interface temperature will reach the softening point of silver; With the recommended regular forces, the roughness at the contact interface will collapse on itself, thereby increasing the size of the contact interface. That will cause the contact resistance to decrease.

The advantages of using silver as a contact finish for high-current applications include:

  • Highest conductivity, low resistance
  • Semi-noble, resistant to oxide formation, immune to fretting corrosion
  • Self-healing

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