Circuit board technology enables continuous improvement panel installed on the terminal block can carry current improved a lot, has exceeded the limit 110A, far more than the previous level, which makes the design process, in the end to which power wiringterminal in order to meet the system requirements become more complex. In addition, methods to measure the performance parameters in different regions are also different, even for the nominal parameters given in the same kinds of products, there are considerable differences. Therefore, in order to obtain long-term reliability and to ensure that low cost is very important to understand these differences.

The engineer must also consider another factor often overlooked, marketing considerations. Typically, the terminal block are visible for the user, so the marketing departments often want products in appearance to match the color and style of the entire system.