PCB Circuit Trace Width Calculator
| Enter your values: | ||
| Current: | Amps | |
| Thickness: | ||
| Optional Values: | ||
| Temperature Rise: | Deg | |
| Ambient Temperature: | Deg | |
| Trace Length: | ||
| Result Of Internal Layers: | ||
| Required Trace Width: | ||
| Resistance: | Ohms | |
| Voltage Drop: | Volts | |
| Power Loss: | Watts | |
| Result Of External Layers in Air: | ||
| Required Trace Width: | ||
| Resistance: | Ohms | |
| Voltage Drop: | Volts | |
| Power Loss: | Watts | |
What is a PCB Circuit Trace Width Calculator?
A PCB Circuit Trace Width Calculator is a tool used to determine the optimal width of a copper trace on a printed circuit board (PCB) to handle a specific current without overheating or causing voltage drop issues.
Why is a PCB Circuit Trace Width Calculator Important?
- Prevents Overheating & Burnout – Ensures the PCB traces can carry current safely.
- Minimizes Voltage Drop – Reduces resistance and ensures efficient power delivery.
- Optimizes PCB Layout – Helps balance space constraints and electrical performance.
- Ensures Reliability – Prevents long-term failure due to thermal degradation.
How Does a PCB Circuit Trace Width Calculator Work?
The trace width is calculated using IPC-2221 standards based on current, temperature rise, and trace thickness. The formula is:
where:
- W = Trace width (mils or mm)
- I = Current (A)
- k, b, c = Empirical constants based on IPC-2221
- ΔT = Temperature rise (°C)
- Copper Thickness = 0.5oz, 1oz, 2oz, etc. (affects resistance and heat dissipation)
For standard PCB designs, an online calculator simplifies these complex equations.
When is a PCB Circuit Trace Width Calculator Used?
- PCB Design & Manufacturing – Ensuring proper trace sizing in high-current applications.
- Power Electronics & IoT Devices – Preventing excessive heat in power supply circuits.
- RF & High-Frequency Circuits – Avoiding signal integrity issues.
- Automotive & Aerospace Applications – Designing PCBs for harsh environments with high power loads.