Pcb Via Current Capacity
It seems reasonable that the current carrying capacity of the via is determined by the same thing that de termines the current carrying capacity of the trace cross sectional area and environment.
Pcb via current capacity. The standard provides the current carrying capacity limits of vias. Mm current carrying capacity. Mm diameter of the via. With it the via current calculator calculates the current a via needs to raise its temperature over ambient per ipc 2152.
Jay wang june 25 2006 i found an article describing the via vs. Trace and via current carrying capacity are legitimate design points to focus on when designing a new board that will carry high current. A microvia corresponds at least a trace with the width 4mil 0 1mm the thickness 13um and stands a current of 0 2a. Over on the circuits assembly blog michael asked a question about my via in pad myth 5 he asked.
The larger 16mil 20mil and even 24mil via do not have obvious advantage in current carrying and not linearly increasing. Current carrying capacity of vias t 10 sek. One common question from designers particularly new designers that are learning about industry standards is current carrying capacity of conductors in a pcb. Thanks for the good suggestions.
Therefore we recommend 10 12mil via to load current higher efficiency but also more convenient design. I have a question about vias i have seen charts on the current carrying capacity of traces but what about vias that s a good question. Current from the following link. I ve heard that you first need to know the thickness of the via wall.
The goal is to keep conductor temperatures below some appropriate limit which then helps keep. Pcb trace width calculator trace width is an important design parameter in pcb design. As i know there exist limits on maximum current a pcb via can tolerate before it melts before the via s temperature rises unacceptably high above ambient say 10 100 c above ambient depending on. 12mil via can safely carry around 1 2a of current which is looser than the widely recognized 0 5 in the industry.
Other via properties to consider include. You may use this online tool to calculate an estimate of the minimum trace width for a given current and copper weight. Relationship trace width and current carrying capacity. Looking first at the cross sectional areas they are equal for both the via and the trace when.
Current table helps you understand the relationship between pcb trace width and current carrying capacity so you can determine the required trace width for your printed circuit board design.
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