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1000V for 1.5mm thick FR4 pcb from Oshpark?

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skywalker898

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Hi we are building a pulsing circuit and designing the pcb ourselves. We see that the thickness of FR4 from Oshpark is 1.5mm (total thickness of pcb with traces is 1.6mm). We are wondering if it is okay to have 1000V DC across the FR4?

Thanks,
Brandon
 

Yes Brandon, FR4 will easily withstand 1Kv directly directly through the fibreglass from one side to the other.

Your biggest problem will be flash over and leakage between tracks that are located on the same side.
For reasons I do not understand, air breaks down at a much lower voltage across a flat insulating surface than just directly through air.

It will work, but provide very generous clearances around high voltage tracks.
 
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