I read two articles today that I found enlightening and cross-referenced to find some information on the subject, most of which give straightforward data, as shown below: The unit of line width: Inch Data source: MIL-STD-275 Printed Wiring for Electronic Equipment Related Tool: Calculator for PCB Trace Width After reading the article on Temperature Rise in PCB Trace carefully, I have gained a lot, and now I am picking out the important part to better understand the current-carrying capacity of PCB board wire paths. We know that the PCB board on the wire current load capacity is limited, and we generally define the maximum load current that a wire of a certain width and thickness can withstand within the specified wire temperature rise under certain environmental conditions. Here we also need to subdivide them into two types of current, continuous current and instantaneous inrush current (continuous current refers to the continuous flow of current through the wire...