Wider 2 oz or thicker 3 oz: compare equal cross-sectionsWider 2 oz or thicker 3 oz: compare equal cross-sections2 oz: 15 mm × 70 µm3 oz: 10 mm × 105 µmBoth ideal sections = 1.05 mm²Same length and copper temperature → same ideal DC resistanceDifferent widths → different routing, heat spreading and etch constraintsNeither option is approved by this area comparison alone.Engineering illustration · Not to scale · Example values are not product ratings