Purchasing Terminal Blocks: These Key Points Help You Choose High Quality Products

Terminal blocks are critical components in electrical connections, and their quality directly affects the stability and safety of the circuit. Neglecting details during procurement may lead to potential hazards such as poor contact, heating, and even fire. Master the following key points to help you accurately select high-quality products.

Material is the core foundation

High quality terminal blocks are usually made of high-purity copper materials (such as purple copper), which have good conductivity and low resistivity, and can effectively reduce energy loss and heat generation. Some products will be plated with tin or silver on the copper surface. The former can prevent oxidation and corrosion, while the latter further enhances conductivity and high temperature resistance. Avoid choosing recycled materials or low-quality copper with high impurity content, as these materials are prone to brittleness and unstable conductivity.

Structural adaptation application scenarios

Select terminal type according to actual needs:

Screw type: By tightening the wire with screws, it is suitable for fixed scenarios with low vibration, but it is necessary to regularly check whether the screws are loose;

Spring type: using spring elasticity to fix wires, easy installation and good seismic resistance, commonly used in industrial equipment;

Plug in: Modular design for quick replacement and maintenance, suitable for testing environments with frequent plugging and unplugging.

In addition, it is necessary to confirm that the wiring aperture of the terminal matches the cross-sectional area of the wire. If it is too small, it may cause insufficient crimping, while if it is too large, it may result in poor contact.

Certification and standards are quality endorsements

Priority should be given to products that have passed international certifications (such as UL, CE, VDE) or domestic 3C certification, which means that the terminals comply with mandatory standards such as safety and environmental protection. At the same time, check whether the product is clearly labeled with specifications (such as rated current, voltage, temperature range), and avoid using "three no" products.