Say the terminal block, everyone knows that the terminal block is a device that acts on the electrical connection. Therefore, for the terminal block, it needs to have certain flame retardant properties, insulation properties, impact resistance, etc., so what material is it? What is the performance of the terminal block? Below, Kenbo Xiaobian will tell you about the raw materials that are often used in terminal blocks.

At present, in the process of producing terminal blocks in the market, the terminal blocks are mainly made of ABS engineering plastics and polycarbonate. The following is a brief introduction to the two materials.

ABS engineering plastics are also acrylonitrile-butadiene-styrene terpolymers, which are general-purpose engineering plastics with various varieties and versatility, also known as "universal plastics". Although the impact resistance and flame retardant performance are poor, it is easy to oxidize and discolor, and the surface will appear yellowish after use. However, many low-end, ultra-low-end switch socket products still use ABS to make panels, frames and holders, and it is not known as ABS, only known as advanced engineering plastics.

Polycarbonate, commonly known as bulletproof rubber. It is a kind of thermoplastic engineering plastic with excellent comprehensive performance. It has the advantages of high strength, high toughness, high heat resistance, high flame retardancy, high electrical insulation performance, anti-ultraviolet light, color stability and no discoloration. It is often used in automobiles and electronic appliances. , construction, office equipment, packaging, sports equipment, health care equipment, household items and other fields.

In the electrical connection system, the pcb terminal block and the circuit board need to be renewed and fixed by the soldering process, but in some cases, some cases may cause some poor soldering during the soldering process. Xiaobian will tell you why the terminal block has poor soldering during the soldering process.

There are many reasons for the poor soldering of the terminal block. The following small series will give you a brief explanation of the more common causes of poor soldering. So that everyone can effectively avoid these errors when doing soldering operations.

The tin-lead plating solution of the terminal is contaminated, resulting in poor plating; excessive amount of gloss agent, resulting in excessive carbon content in the coating; poor processing after plating (salt formation, foreign matter adhesion, etc.); excessive voltage during plating, causing thermal oxidation of the plated part Passivation; the current density is too high, the bath temperature is too high, etc., resulting in poor plating structure; the plating of the terminal is welded due to poor placement and time, causing oxidation of the coating;