Pcb Trace Current: external
ext 2oz 30C 3A to ext 3oz 30C 5A
PCB trace width vs. current carrying capacity per IPC-2221 Section 6.2 formula (external: I=0.048×ΔT^0.44×A^0.725; internal: I=0.024×ΔT^0.44×A^0.725). Covers external and internal PCB layers, copper weights 0.5–3 oz/ft², temperature rises 10–45°C, currents 0.5–10 A. Includes trace width in mils and mm, copper cross-section area, and trace resistance per inch.
| layer type | record id | copper thickness mils (mil) | copper weight oz (oz/ft2) | cross section mils2 (mil2) | current A (A) | resistance mohm per inch (mohm/in) | standard | temp rise C (C) | trace width mils (mil) | trace width mm (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| external | ext 2oz 30C 3A | 2.74 | 2 | 27.95 | 3 | 1.07 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 30 | 10.2 | 0.259 |
| external | ext 3oz 10C 10A | 4.11 | 3 | 314.48 | 10 | 0.095 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 10 | 76.5 | 1.943 |
| external | ext 3oz 10C 5A | 4.11 | 3 | 118.37 | 5 | 0.25 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 10 | 28.8 | 0.731 |
| external | ext 3oz 20C 5A | 4.11 | 3 | 77.27 | 5 | 0.39 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 20 | 18.8 | 0.478 |
| external | ext 3oz 30C 5A | 4.11 | 3 | 59.2 | 5 | 0.5 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 30 | 14.4 | 0.366 |
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