great info. I've done a power law fit of the data tables for widths of 12mm to 40mm and thickness of 2mm to 10 mm. It's got an R^2 = .998 within this range.
a 9.08783195487184
b 0.8926
c 0.493412
I_busbar = a*w^b*t^c
where:
w = width of busbar [mm]
t = thickness of busbar [mm]
I_busbar = max current of the busbar [Amps]
