Bimetallic lugs are vital in new electrical systems as they are used to join aluminium conductors to copper busbars or terminals. This is important as there may be galvanic corrosion, high resistance, and ultimately, joint failure if aluminium and copper are in direct contact. Bimetallic lugs fix this issue by having both metals in one connector: an aluminium barrel for the cable and ... https://www.pioneerpowers.com/bimetallic-lugs-and-connectors.php