Square Silver Contact Tips: AgNi + CuNi Precision Solutions

Optimizing Square Geometry for High-Current Loads

In heavy-duty applications like AC Contactors and Circuit Breakers, square and rectangular silver contacts are the preferred geometry. Unlike round rivets, the linear edges of square tips allow for better control of the electrical arc and a larger surface area for heat conduction away from the contact interface.

AgNi + CuNi: The Composite Advantage

Our square contacts often utilize a Bimetal structure. The AgNi (Silver Nickel) working surface provides high erosion resistance, while the CuNi (Copper Nickel) base layer is essential for two reasons:

• Thermal Stability: Helps maintain mechanical integrity under the intense heat of industrial arcing.
• Brazing Excellence: The CuNi base is specifically formulated to be compatible with common silver brazing alloys, ensuring a 100% void-free bond to copper carriers.

Standard Sizes and Material Ratios

Application in Renewable Energy

With the rise of PV Inverters and EV Charging Stations, the demand for reliable square AgSnO2 and AgNi tips has increased. CD Silver provides specialized oxidation-resistant square contacts that maintain low contact resistance even in the harsh cycling environments of renewable energy grids.