One of the key elements of the terminal that must be considered is the output power of the components to solve the work ability. Simply reading the article data information guide does not ensure accurate and relatively data information. Technical engineers must master how the product characteristic data information listed in the guide is clearly tested.
At this stage, organizations such as UL, IEC, CSA and DIN do not have uniform specifications when clarifying the output power and characteristic specifications of terminal products. Customers must understand the difference between UL and IEC specifications. The specifications and models of the terminal products manufactured in Europe use the IEC standard, and the products manufactured in the United States use the UL standard.
The difference between these two norms is very big. Technical engineers who do not understand the product model determination method will take a very big risk, because the components used may not reach the required output power level, or the specifications and models of the components used far exceed the design plan. must. In Europe, the rated current of the components is determined based on the temperature of the electrical conductor of the metal material when the current is increased. When the temperature of the metal material foot is higher than the working temperature of 45℃, the accurate measurement staff will use the current at this time as the rated voltage value (or larger current) of the component.
Another item of the IEC specification model is the allowable current, which is 80% of the larger current. Unlike this, the UL specification will make the metal material electrical conductor temperature higher than the working temperature of 90% of the current when the operating temperature is higher than 30 ℃ as the current value of the component. It is not difficult to see that the temperature of a part of the metal electrical conductor is a very critical element in all applications. This is crucial for machinery and equipment. Because mechanical equipment generally must be in a working environment with a temperature of 80°C. If the temperature of the terminal is 30°C or 45°C higher than this temperature, the temperature of the terminal may exceed 100°C.
According to the types of tolerance values and insulating layer materials selected for the selected components, the products must be operated at a current less than the rated current, so as to ensure that they can work reliably within the expected temperature range. Sometimes, the raw materials suitable for compact package components will not be able to take into account the heat pipe heat dissipation regulations very well. Therefore, the current flow of this type of terminal components must be much less than the rated current. In this way, it best reflects the necessity of how to choose a terminal.
