Optimize your circuit board designs with our **PCB Trace Width Current and Temperature Calculator**. Accurately determine the **maximum current capacity** a trace can safely carry for a given temperature rise, or calculate the **temperature rise** for a specific current. This tool utilizes industry-standard **IPC-2221 guidelines** to ensure reliable and efficient PCB layouts, preventing overheating and potential component damage.
Formula:
This calculator uses a modified version of the **IPC-2221 standard** (often referred to as IPC-2152 but based on IPC-2221 for simpler calculations) to determine the relationship between trace dimensions, current, and temperature rise.
For Current (I):
I = k * (ΔT_C ^ 0.44) * (W_mil * T_oz ^ 0.725)
For Temperature Rise (ΔT):
ΔT_C = (I / (k * (W_mil * T_oz ^ 0.725))) ^ (1 / 0.44)
Where:
- I: Current in Amps (A)
- ΔT_C: Temperature Rise in Celsius (°C)
- W_mil: Trace Width in mils (1 mil = 0.001 inch)
- T_oz: Copper Thickness in ounces (oz)
- k: Constant (0.048 for external layers, 0.024 for internal layers)
Estimated Trace Resistance (R) at 20°C:
R = (0.67 * L_inch) / (W_mil * T_oz) Ohms
Voltage Drop (Vdrop):
V_drop = I * R Volts
Power Dissipation (Pdiss):
P_diss = I^2 * R Watts