PCB Copper Bar Current Capacity Calculator
A tool for calculating the current capacity of PCB copper bars based on the IPC-2221A standard
Input Parameters
Calculation Results
Material Selection Guide
Material Selection Guide
Pure Copper:
✓ Best conductivity
✓ Good heat dissipation
✗ Higher cost
✗ Lower mechanical strength
Recommended for: High current, high heat dissipation requirements
H62 Brass:
✓ High mechanical strength
✓ Cost-effective
✗ Lower conductivity
Recommended for: High mechanical stress, cost-sensitive applications
Design Reference
- Calculation based on IPC-2221A standard
- It is recommended to leave a 30% safety margin in actual design
- For high current applications (>10A), it is recommended to perform actual tests for verification
- The calculation results do not consider the influence of heat dissipation conditions, and heat dissipation design needs to be considered in actual use
Material Comparison
| Material | Resistivity (20°C) | Temperature Coefficient | Features |
|---|---|---|---|
| Pure Copper | 1.75 × 10-8 Ω·m | 0.00393 /°C | Best conductivity, suitable for high current applications |
| H62 Brass | 6.9 × 10-8 Ω·m | 0.0017 /°C | High strength, cost-effective, suitable for high mechanical stress applications |