Benchmarking Electrical, Thermal, and Mechanical Performance of Various Industrial REBCO Coated Conductors for Magnet Applications

Rare-earth barium copper oxide (REBCO) superconducting tapes have experienced a rapid rise in demand and production, driven largely by high-field magnet and fusion applications. With the ongoing push for higher critical current density and long-length deposition, material used and fabrication processes continue to evolve. This makes regular independent evaluation and comparison of commercial products essential. In this work, we benchmarked tapes from four of the major manufacturers, assessing their electrical (at <inline-formula xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex-math notation="LaTeX">$\text{77}~\text{K}$</tex-math></inline-formula>), thermal, and mechanical performance (at room temperature). In addition, two batches of THEVA conductors from different production years were compared, highlighting improvements in their overall suitability for high-field magnet applications. The results provide a statistically reliable basis for magnet coil design, improvements in joint fabrication, and the establishment of safer operation margins.