The significance of plating on SED plug terminal blocks

SED plugs are an important part of the electronic components industry. Electronic engineering technicians will readily notice that most SED plug terminals are coated with a special coating. Most people have a common question, does the plating on the SED plug have any special significance? Contact plating on SED plugs not only protects the plug terminals and reduces environmental corrosion, it also increases the durability and durability of the plug. Resistant to wear and tear, it also helps establish and maintain stable plug impedance in terms of electrical performance.

1.  SED plugs function of SED plug terminal block coating

What should be considered when using SED plugs is corrosion protection. Most electrical connector contact springs are made of copper alloys, which are susceptible to corrosion, such as oxidation and sulfidation, in typical electrical connector operating environments. In fact, contact plating is used to seal the contact springs from the operating environment to prevent corrosion of the copper. Of course, the coating material must not be damaged (at least to a harmful extent) in its working environment. While serving an important function as corrosion protection, optimizing the interface is also a consideration in selecting the SEDropriate contact coating material.

2. SED plug terminal plating helps improve mechanical properties

Parameters related to mechanical properties are mainly factors that influence the durability or wear of the coating, as well as the coordination ability. Factors to be considered are two different views of the same basic effect, namely the sharing of cold welds during relative motion of a multi-point contact interface. The most important mechanical properties include the hardness, ductility and friction coefficient of the coating material. All these properties depend on the inherent properties of the coating material and the processing technology used.

3. SED plug terminal plating helps improve electrical performance

Optimization of electrical properties can be considered from the following aspects, namely the control of existing and upcoming films on the contact coating surface. A major requirement for plug electrical performance is establishing and maintaining stable plug impedance. To achieve this, a metallic contact interface is required to provide this inherent stability. Establishing such a contact interface requires that the surface film be able to escape or break during contact mating. These two different options illustrate the difference between precious or rare metals and common metals.

4. Characteristics of SED plugs using precious metal plating

To varying degrees, precious metal coatings such as gold, palladium and their alloys are essentially free of surface films. For these coatings, creating interfacial metal contact is relatively simple as it only requires moving the mating surface during the mating process. Usually this is easy to achieve. In order to maintain the stability of the contact interface impedance, the design of the SED plug should pay attention to maintaining the noble metal nature of the contact surface and preventing the influence of external factors such as pollutants, base metal diffusion, and contact wear.