Trimetal Electrical Connectors

Trimetal Electrical Connectors are a revolutionary electrical contact material solution designed for industrial control relays and applications requiring left-right switching functions. This innovative structure employs a three-layer composite design with a high-performance silver alloy head and feet, and a high-conductivity copper middle layer, achieving a perfect balance between performance and cost. In the domestic electrical contact material industry, very few manufacturers can consistently produce high-quality triple-composite contacts, primarily due to the extremely high technical barriers and process control difficulties. Leveraging years of experience in materials science and precision manufacturing, we have successfully overcome this technical barrier, providing a reliable and cost-effective contact option for the industrial automation field.

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Products Description

Trimetal Electrical Connectors' three-composite contacts achieve a breakthrough in both performance and cost through innovative material layering design and precision manufacturing processes. The head and feet are made of highly conductive silver alloy, while the middle layer is high-strength copper, forming a "silver-copper-silver" sandwich structure. This design is specifically tailored for changeover moving contacts in industrial control relays, high-voltage switches, and other applications requiring left-right movement. This technology fills a technological gap in the domestic high-end contact field and has become the preferred solution for replacing imported products.

Core Advantages

Significantly Improved Cost Efficiency

Compared to all-silver contacts, the Electrical Trimetal Rivet Electrodes reduces silver usage by 30%–50%. In the current market environment of high precious metal prices, this provides customers with considerable cost reduction potential without sacrificing key electrical performance.

Silver Layer Reliability Withstands Rigorous Testing

By precisely controlling the thickness of the silver alloy layer (typically 0.1–0.3mm, customizable according to operating conditions) and employing interface strengthening technology, we ensure that the bonding strength between the silver layer and the copper substrate is ≥200 MPa, far exceeding industry standards. Even under high-frequency mechanical shock, thermal cycling, or high-current switching conditions, there is no delamination, cracking, or localised peeling for Trimetal Electrical Connector.

Optimized for Dynamic Switching Scenarios

The Trimetal Moving Contacts is particularly suitable for moving contact structures requiring left-right sliding or oscillating movements (such as bistable relays and changeover contactors). Its symmetrical silver layer design ensures consistent electrical performance and wear characteristics regardless of which side is in contact, extending service life and improving operational consistency.

Trimetal Electrical Connector

Manufacturing Process

Material Pretreatment

High-purity copper and silver alloy strips are ultrasonically cleaned and surface-activated to remove oxide films and contaminants for Tri-metal Electrical Contact Rivet.

Composite Forming

Under an inert atmosphere, the three metal layers are bonded at the atomic level through hot rolling or diffusion bonding processes for Trimetal Moving Contacts.

Annealing and Ageing Treatment

Eliminates residual stress, optimises grain structure, and improves ductility and bonding strength for Trimetal Electrical Connector.

Precision Punching/Cutting

Formed to drawing dimensions under CNC control, with burr-free and micro-crack-free edges.

Trimetal Electrical Connectors Production and Testing Equipments

Detailed Showcase

Precise Silver Layer Coverage

The silver alloy layer on the head and feet precisely covers key contact areas, with no missed areas or uneven plating. Under magnification, the clear boundary and uniform transition between the silver and copper layers are clearly visible for Electrical Trimetal Rivet Electrodes.

Smooth Contact Surface

The contact surface undergoes precision polishing, with a surface roughness Ra≤0.2μm, reducing fluctuations in contact resistance and improving contact reliability for Trimetal Electrical Connector.

Standardized Dimensions

Utilizing precision stamping technology, the product's dimensional tolerances are controlled within ±0.005mm, ensuring precise assembly with the relay housing and preventing operational jamming due to dimensional deviations for Trimetal Moving Contacts.

Environmentally Friendly Surface Treatment

Employing a cyanide-free electroplating process, meeting global environmental standards, the product surface is free of harmful residues, aligning with the environmental requirements of high-end intelligent manufacturing.

Tri-metal Electrical Contact Rivet