Pcb Trace Current: external
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) | notes | resistance mohm per inch (mohm/in) | temp rise C (C) | trace width mils (mil) | trace width mm (mm) |
|---|---|---|---|---|---|---|---|---|---|---|
| external | ext_0p5oz_10C_0p5A | 0.685 | 0.5 | 3.49 | 0.5 | IPC-2221 external layer; I=0.048×dT^0.44×A^0.725 | 8.52 | 10 | 5.1 | 0.13 |
| external | ext_0p5oz_10C_10A | 0.685 | 0.5 | 308.73 | 10 | IPC-2221 external layer; I=0.048×dT^0.44×A^0.725 | 0.1 | 10 | 450.7 | 11.448 |
| external | ext_0p5oz_10C_1A | 0.685 | 0.5 | 10.14 | 1 | IPC-2221 external layer; I=0.048×dT^0.44×A^0.725 | 2.94 | 10 | 14.8 | 0.376 |
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