Analysis Of The Difference In Shrinkage Rate Of Copper Terminal Block Materials

copper terminal block In actual product design and manufacturing, the influence of constituent materials on dimensional stability cannot be ignored. The differences in thermal expansion/contraction characteristics of different materials during temperature changes, processing, and structural assembly can lead to deviations in the overall stability of the final copper distribution block structure.

Metallic conductors are typically made of copper or copper alloys. Pure copper, after cooling or heat treatment, generally has a shrinkage rate of approximately 0.5%–1%. Copper alloys such as brass and phosphor bronze have different compositions and crystal structures, resulting in slight differences in their coefficients of thermal expansion and shrinkage behavior.

copper terminal strip If a plastic or polymer insulating shell is also included, differences in the shrinkage rate of these non-metallic materials compared to the metallic conductor can potentially create minute gaps or stress concentrations.