Copper Bar Resistance Calculator

Calculate the internal resistance and power loss of copper bars

Placement Description

The placement of the copper bar affects its resistance:

Series Placement (SR)

Series Placement Diagram

Current direction is the same as the length direction
Higher resistance value

Parallel Placement (PR)

Parallel Placement Diagram

Current direction is the same as the width direction
Lower resistance value

Importance of Copper Bar Resistance

Accurate calculation of copper bar resistance is crucial for the following aspects:

  • Optimizing current distribution
  • Reducing power loss
  • Controlling temperature rise
  • Improving system efficiency

Note: Actual power loss will increase with temperature rise, the calculation results are for reference only. In practical applications, it is recommended to leave a safety margin of more than 30%.

Temperature effect on resistance: The resistance of metal conductors increases with temperature rise. In high current applications, it is necessary to consider the increase in resistance due to self-heating.