Why Do Copper Terminal Blocks Have Lower Temperature Rise Performance?

As a high current-carrying interface, the electrical conductivity and structure of copper terminal block are directly related to its temperature rise performance. When performing temperature rise tests on the copper distribution block, the increase in component temperature relative to ambient temperature under rated current-carrying conditions is measured to evaluate the heat accumulation at the contact points and the conductor body. Highly conductive materials reduce contact resistance, thereby minimizing heat generation.

Temperature rise performance is influenced not only by the material itself but also by structural design. Larger cross-sectional areas of the conductive path promote more uniform current distribution and faster heat dissipation within the conductor. Furthermore, tight metal contact interfaces reduce contact resistance, limiting heat generation in the initial stages. Standard tests typically employ multiple copper terminal strip interfaces connected in series, recording steady-state temperatures under constant current input; this process reflects the efficiency of heat exchange between the conductor and the environment.