PCB Trace Width¶

PCB Trace Width Calculator¶

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: $A r e a = {(\frac{I}{k \times {T_{Rise}}^{b}})}^{\frac{1}{c}}$	For IPC-2221 external layers: k = 0.048 b = 0.44 c = 0.725 Common value: Temp rise: 10 °C	$A r e a = {(\frac{1 [A]}{(0.048 \times 10)^{0.44}})}^{\frac{1}{0.725}}$ $= 16.3 [m i l^{2}]$
Then, calculate the Width: $W i d t h = \frac{A r e a}{T h i c k n e s s \times 1.378}$	Common values: Thickness: 1 oz(35µm) (Ambient: 25 °C)	$W i d t h = \frac{A r e a}{1 [o z] \times 1.378 [m i l / o z]}$ $= \frac{16.3}{1 \times 1.378}$ $= 11.8 [m i l]$ $= 0.3 [m m]$

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]