PCB Trace Width¶
PCB Trace Width Calculator¶
digikey_PCB Trace Width Calculator
PCB Trace Width (IPC-2221 external)¶
Common values:
Thickness: 1 oz(= 35 µm = 0.035 mm)
Temp rise: 10 °C
(Ambient: 25 °C)
| Formula | Values | Exapmle I = 1[A] |
|---|---|---|
| First, calculate the Area: $$Area=\left(\frac{I}{k \times {T_{\text{Rise}}}^b}\right)^{\frac{1}{c}}$$ |
For IPC-2221 external layers: k = 0.048 b = 0.44 c = 0.725 Common value: Temp rise: 10 °C |
$$Area=\left(\frac{1[A]}{(0.048 \times 10)^{0.44}}\right)^{\frac{1}{0.725}}$$ $$= 16.3[mil^2]$$ |
| Then, calculate the Width: $$Width=\frac{Area}{Thickness \times 1.378}$$ |
Common values: Thickness: 1 oz(35µm) (Ambient: 25 °C) |
$$Width = \frac{Area}{1[oz] \times 1.378 \, [mil/oz]}$$ $$= \frac{16.3}{1 \times 1.378}$$ $$=11.8[mil]$$ $$=0.3[mm]$$ |
Calculation:
Current (I)= 1[A] -> Minimum Trace Width 0.3[mm]
Current (I)= 2[A] -> Minimum Trace Width 0.3x2^(1/0.725)= 0.3x2.6 = 0.78[mm]
Current (I)= 1.23[A] -> Minimum Trace Width 0.3996[mm]