Electrical Technology Experts Reveal The Secrets Of Material Selection For Push-in Terminal Blocks
push fit connector block is a common connector product in industrial production. It can transmit stable signals and currents to the required equipment during the use of push fit terminal. However, there are thousands of push fit terminal block connector product types on the market, and their application materials are also different. Shanghai Youle Electric, as a professional push in connector block R&D manufacturer, will lead you to explore the secrets behind terminal production.
The conventional production materials and characteristics of push in terminals with clamping screws are summarized as follows:
push in wire terminal block and connectors, the conductor used in the busbar is made of electrolytic copper (H65) as the basic material. The conductivity of copper is second only to silver. Since the wires connected to the terminals are all made of copper, the same material and the same expansion coefficient will not cause loose connections.
In order to meet different product requirements, different materials must be selected according to specific applications
1. Thermosetting plastic EP
It has good geometric stability, low water absorption, and a high tracking index compared to leakage current. Very flame retardant, stable and superior to thermoplastics at elevated temperatures, but poor toughness;
2. Glass fiber reinforced nylon PA-F
Glass fiber reinforced nylon has strong rigidity and hardness, and its use temperature is higher than that of non-reinforced nylon. Therefore, it is also suitable for overvoltage protection.
Reinforced nylon absorbs less water than non-reinforced nylon. Apart from the above differences, the other properties of the two materials are the same. According to UL94, the flame retardant grade of fiber reinforced nylon is HB to V0, among which V0 type material is dyed black in most cases;
3. Thermoplastic polycarbonate PC
Such as high hardness, good impact toughness, transparency, dimensional stability, good insulation performance and good thermal stability.
Transparent polycarbonate is particularly suitable for cover or identification materials.
Polycarbonate has stability against erosion by mineral acids, saturated fat carbohydrates, gasoline, fats and oils.
Polycarbonate is less resistant to solvents, benzene=alkali solution, acetone and ammonia. Stress cracks may form when in contact with certain chemical reagents;
4. Thermoplastic polyester PBT
PBT has good geometric stability, and the glass fiber reinforced material has high strength and heat resistance. It also has reliable flame retardancy and excellent electrical properties;
5. Thermoplastic nylon 6.6
The quality of the insulation shell of the combination push wire terminal block is very high, and most of them are made of thermoplastic nylon 6.6, which can be processed economically by injection molding, is harmless to the environment, and is conducive to recycling.
