Bimetallic Terminal Blocks: Engineering Design For Contact Impedance Stability

In the field of electrical connections, contact resistance directly reflects interface performance. Low and stable contact resistance is not achieved by chance, but is the result of the combined efforts of materials science and structural design. bimetal terminal lug A reliable transition interface is constructed between copper and aluminum through molecular-level fusion of dissimilar metals.

Molecular-level fusion of material interfaces

bimetallic lugs price A friction welding process is used to form a solid bond between the copper palm and the aluminum cylinder under high temperature and pressure. This process avoids the intervention of flux or a third medium, and there are no oxides or gaps at the interface. The welded area exhibits a continuous metallic lattice structure, and current does not need to cross heterogeneous barriers. Actual measurements show that the welding interface resistance of high-quality bimetallic lugs price list can be controlled at the micro-ohm level, which is far lower than that of traditional mechanical crimping methods.

Surface engineering and structural design

cable lug bimetal The stability of the contact surface relies on surface treatment technology. Silver or tin plating not only isolates the substrate from atmospheric contact but also fills surface irregularities at the microscopic level, increasing the actual contact area. The anti-oxidation composite pre-filled inside the aluminum cylinder is squeezed into the conductor gaps during pressing, isolating oxygen and moisture and inhibiting the formation of film resistance. This multi-layer protection from material to surface ensures that the contact resistance remains at its initial design value throughout its entire lifespan.