Introduction to commonly used materials for connectors

Depending on the usage situation, the choice of connector material also varies greatly. The housing of a connector is the body combination of the entire connector, which roughly determines the size and dimensions of the connector. Next, let's look at some connector plastic materials that have very important technical knowledge, including buyers, engineers, jobs, etc. Among them, the technical knowledge that the buyer, engineer and work must learn.

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(1) Connector insulators usually use: PBT, NYLON, ABS, PC, LCP and other materials, but in principle, textures with good flame retardancy are used. (2) Selection principle 1. Good fluidity (for example, thin-walled products such as LCP and nylon can be made) 2. High strength, good impact performance 3. High temperature (especially SMT) 4. Excellent electrical properties (high resistance, low dielectric loss) 5. Short molding cycle (improving productivity and reducing cost) 6. Under the condition of performance, the price is dominant Bonder material: The metal bonder material for plugs is generally brass, but if the number of plugs is very high and the life is long, phosphor bronze, beryllium copper, etc. can also be used. The following introduces the types and properties of copper in the current industry. The contacts may be made of any of a variety of alloys depending on the type of contact, the frequency of the plug, the electrical conditions under which the connector operates, and the environmental conditions. Brass-Brass is a material with good electrical conductivity, but it is easy to deform and fatigue quickly due to repeated bending many times. Typically, fixed contacts are created on inexpensive connectors, or other metal parts are created within the connector. Joints with brass contacts should not be used where good elasticity is required. Of course, brass can still be used as a contact item in many places due to its low cost. Phosphor bronze-Phosphor bronze is more hard than brass while maintaining longer-term elasticity. Frequently used as a material for contacts operating at temperatures below 300 °C. The use of phosphor bronze improves the stability of most connectors where the plug frequency is low or where the contact part bends normally.

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