Pcb Trace Current: external
ext 1oz 10C 3A to ext 1oz 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 1oz 10C 3A | 1.37 | 1 | 55.49 | 3 | 0.54 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 10 | 40.5 | 1.029 |
| external | ext 1oz 10C 5A | 1.37 | 1 | 117.55 | 5 | 0.25 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 10 | 85.8 | 2.179 |
| external | ext 1oz 20C 1A | 1.37 | 1 | 6.71 | 1 | 4.44 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 20 | 4.9 | 0.124 |
| external | ext 1oz 20C 2A | 1.37 | 1 | 19.59 | 2 | 1.52 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 20 | 14.3 | 0.363 |
| external | ext 1oz 20C 3A | 1.37 | 1 | 36.31 | 3 | 0.82 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 20 | 26.5 | 0.673 |
| external | ext 1oz 20C 5A | 1.37 | 1 | 76.85 | 5 | 0.39 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 20 | 56.1 | 1.425 |
| external | ext 1oz 30C 1A | 1.37 | 1 | 5.07 | 1 | 5.88 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 30 | 3.7 | 0.094 |
| external | ext 1oz 30C 2A | 1.37 | 1 | 14.93 | 2 | 2 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 30 | 10.9 | 0.277 |
| external | ext 1oz 30C 3A | 1.37 | 1 | 27.67 | 3 | 1.08 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 30 | 20.2 | 0.513 |
| external | ext 1oz 30C 5A | 1.37 | 1 | 58.5 | 5 | 0.51 | IPC-2221 Section 6.2; IPC-2152; Saturn PCB Calculator | 30 | 42.7 | 1.085 |
What else is in Engineering Database
AI built for engineering. Searches the engineering database, performs calculations, gives source-backed engineering insights.
Get started for free ↗Reference Data375 engineering tablesMaterial properties, pipe and shape dimensions, code tables, and electrical ratings across mechanical, civil, chemical, electrical, materials, and manufacturing engineering.
Browse dataCalculatorsDeterministic engineering calculatorsSizing, checking, and conversion tools that run against the reference tables. Inputs are code-compliant, outputs are traceable to the source standard.
Browse calculators