At present, the use of bare terminals in electronic equipment has become a trend, bare terminal equipment itself is gradually increasing, can carry more power. The following is a detailed introduction to the important factors that affect the selection of bare terminals.

1. Power processing elements

One of the primary considerations is that the power handling capability of the equipment does have a unified specification when confirming the power functional specifications of the bare terminal products. Bare terminal products manufactured in Europe use IEC specifications, while products manufactured in the United States use UL specifications.

The difference between these two specifications is very large. Engineers who do understand the measurement methods of product specifications will take considerable risks because the equipment selected may reach the required power level, the specifications of the equipment used far exceed the planning requirements. In Europe, the current rating of the equipment is confirmed by monitoring the temperature of the metal conductor as the current increases. When the temperature of the metal pin is 45 ° C higher than the ambient temperature, the surveyor will use the current as the rated current value ( maximum current value) of the equipment. Another item of the IEC specification is the allowable current value, which is 80% of the maximum current. Different this, the UL specification will make the metal conductor temperature 90% higher than the ambient temperature by 90% of the current value as the nominal current value of the equipment. This shows that the temperature of the metal conductor is a very important factor in all uses. This is more important with regard to industrial equipment. Because industrial equipment usually needs to operate in an environment with a temperature as high as 80 ℃. Depending on the nominal value type insulation data of the selected equipment, it is necessary for the product to operate with current below the rated value, so as to ensure that they can reliably operate within the desired temperature range. Sometimes, the data suitable for compact packaging equipment may be able to meet the heat dissipation requirements well, so the current when using such bare terminal equipment must be much lower than the rated value.

2. Appearance elements

Although the name "bare terminal" does sound beautiful, many companies think it has played an important role in product appearance user affinity. Bare terminals are necessary to facilitate field installation, because they are often installed at the front of the easy-to-see product panel. In this way, marketers often expect a certain say in the appearance of bare terminal products. But this situation is often encountered: the engineer's planned products meet all mechanical electrical parameters, but they have to be modified because they do meet the sales requirements. In many industrial control systems, bare 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 device.