As for the current load capacity of terminals, it is similar to the commonly understood over-current protection capability. When the current exceeds a predetermined high value, a protection mode that makes the protection device act. The over-current protection is that when the current flowing through the protected element exceeds a preset value, the protection device starts and ensures the selectivity of action with time limit to trip the circuit breaker or give an alarm signal. The current load capacity of St terminal is realized by the resistance of its conductive parts.
Each terminal has its own current level. When the current passing through the terminal exceeds the load of PCB terminal, the terminal will fail and cause short circuit. The current load capacity of printed circuit board terminals and connectors depends on several technical parameters.
In order to achieve the required load capacity, the more stable the product structure, the stronger the terminal current load capacity. The thickness, width and other parameters of the conductive parts of the terminal should meet the requirements of current products; the selection of insulation materials is also related to the current load capacity. The slower the aging speed of insulation material is, the stronger the current load capacity of terminal is.
The number of wiring terminals shall meet the installation requirements. For plug-in terminals, the plug and socket shall be corresponding. In addition to consulting the manufacturer, products with different pin spacing shall not be used to match without authorization, so as to avoid damage to the equipment. The higher the ambient temperature, the weaker the current load capacity. This is why in order to ensure the good operation of the equipment, electrical equipment needs a good cooling environment.
The current load capacity is one of the specification parameters of the terminal, which means that under normal conditions, when there is current passing through the adjacent 5-bit terminals at the same time, it will not damage the components due to heating and will not affect the function of the components.