Comparison Between Aluminum And Copper Foil In Transformer
In the design and manufacturing of foil-wound transformers, the selection of the conductive substrate directly affects the equipment's energy efficiency, size, weight, manufacturing cost, and long-term operational reliability. Copper foil and aluminum foil are currently the two most widely used winding materials in the industry. They differ significantly in conductivity, physical properties, processing technology, and overall cost, making them suitable for transformer products of different voltage levels, capacities, and application scenarios. The core performance parameters are compared below: Performance Dimension C11000 Copper Foil (Soft Annealed) 1060 Electrical Aluminum Foil (O State) Conductivity ~100% IACS ~61% IACS Density 8.9 g/cm³ 2.7 g/cm³ Thermal Conductivity ~401 W/(m·K) ~237 W/(m·K) Elongation ≥35% ≥25% Material Cost Higher, large price fluctuations Lower, relatively stable price From a conductivity perspective, copper foil 's intrinsic conductivity i...