What appearance factors should be considered when selecting terminal blocks? Many companies believe that it plays an important role in product appearance and user affinity. Power terminals must be easy to install on site because they are often installed at the front end of product panels that are easy to see. In this way, marketers often want to have a certain say in the appearance of power terminal products. However, it is often encountered that the products designed by engineers meet the requirements of all mechanical and electrical parameters, but have to be changed because they do not meet the sales requirements. If this happens at the end of the design cycle (often when the marketing department sees the prototype for the first time), a fierce debate is inevitable and may lead to higher costs and delivery delays. In many industrial control systems, wiring terminals are often one of the few components that technicians need to pay special attention to. Although its user interface is relatively simple (mainly screws), it is very important for the normal operation of the equipment

In general, as the current increases, the wires become thicker, and the torque required to fasten these thick wires to the terminal blocks also needs to increase. Therefore, the power terminal needs larger screws and stronger insulating shell. Sometimes small screws are used to save space. This is often the case in very compact terminal products. Some wires are more than 1 / 4 inch in diameter, so these small screws are difficult to deal with. When technicians and maintainers need to install multiple lines, using large enough screws to simplify the connection can greatly save time. This is also the reason why it is so important for engineers to listen to the opinions of the marketing department as soon as possible in the design process

When terminals are used in consumer products, appearance becomes more and more important. In fact, some designers often specify gold plating for terminal devices used in audio equipment, which increases the cost and does not significantly improve the performance, but gold plating does improve the appearance of the product