What are the materials selected for industrial connectors?

I. What are the materials selected for industrial connectors? The materials used in the manufacture of heavy-duty connectors are divided into two main categories: 1. Metal used for contacts and housings 2. Plastic used for insulators The performance of the contacts is largely related to the materials used, of which the decisive characteristics are: ① Strength and elasticity ② Electrical conductivity ③ Larger operating temperatures Considering the above factors, copper alloy has been selected as the contact material. Metal housing materials Depending on the application, brass, cast zinc or aluminum alloys are used for the metal housing. For ease of processing and strength, brass is used for round housing parts, and cast zinc or aluminum alloy is used for corner housings and parts that require fine processing. Insulator materialPBT is preferred for the insulator of the connector. This plastic can be used at temperatures up to 130°C and is particularly suitable for die casting parts at high temperatures. This plastic has good chemical and electrical properties, strong stability. Pin plating materials In order to protect the pins and shells from harsh environments and to improve their wire performance, the contacts require surface treatment. Gold or silver plating is applied to the pins, which improves both conductivity and stability. Connectors with gold-plated pins are recommended for use with milliamperes and low voltages to improve electrical performance as well as to increase rust resistance. The housing is nickel-plated, chrome-plated or aluminum anodized for rust resistance and aesthetics. Sealing MaterialsTo meet the sealing protection requirements, all circular connectors have seals made of elastomeric materials such as polybutadiene rubber, fluoride rubber or silicate rubber. Plastic housingsThe plastic housings use PA (polyamide), a reliable material (internationally known as nylon). It is characterized by toughness, good abrasion resistance, high corrosion resistance to organic solvents and grease, and can be used as usual at temperatures below 120 °C.

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