Electrical Silver Brazing Contacts For Switch Connecting
Products Description
Electrical Silver Brazing Contacts for Switch Connecting are electrical connection assemblies formed by precisely bonding high-purity silver contacts to a copper substrate using a silver-based brazing process. These products are widely used in relays, contactors, circuit breakers, thermostats, and other high and low-voltage electrical equipment, performing the core function of circuit switching. Structurally, the product consists of a silver contact head and a copper conductive substrate, bonded together by metallurgical-grade brazing to form a composite structure that combines excellent conductivity and mechanical strength.
This series of products utilizes the core technology of Brazing Silver to Copper, which allows liquid brazing filler metal to fill the joint gap without melting the substrate material, forming a dense, non-porous metallurgical bonding layer. This ensures long-term stable contact resistance and reliable, durable mechanical connections.
Key Selling Points of Silver-Copper Composite Structure
The finished product is uniformly categorized as Silver-Tipped Copper Contact Assembly. The working surface uses highly conductive solid silver or silver alloy material, while the base uses highly ductile oxygen-free copper, achieving a triple core performance of conductivity, heat dissipation, and arc resistance.
The integrated Silver Contact Joined Copper Assembly eliminates the need for secondary assembly by the customer. The entire process-stamping, brazing, polishing, deburring, and environmentally friendly passivation-is completed at the factory. Customers can directly assemble it into the switch housing upon receipt, reducing 2-3 pre-processing steps.
The high-power contactor matching model is a professional Silver Contact Welded Assembly for Contactor, featuring a widened and thickened copper base design to enhance heat dissipation, adapting to high-current breaking conditions and suppressing excessive contact temperature rise.
All finished products feature an integrated composite structure, contrasting with the separate silver sheet and copper bracket procurement solution. This reduces the types of materials customers need to store, lowers the overall costs of material management, incoming material inspection, and secondary processing, and improves customer production and delivery efficiency.
Technical Features
Metallurgical-grade Bonding
The metallurgical bonding layer formed by the Brazing Silver to Copper process offers superior bonding strength and conductivity compared to mechanical connections. The silver-based brazing filler metal fills the joint gaps through capillary action within the 650-700℃ temperature range, forming a dense, non-porous metallurgical bonding layer. This ensures long-term stable contact resistance and reliable, durable mechanical connections.
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Low Thermal Impact
The brazing temperature of Brazing Silver Electrical Contacts is below the melting point of copper (1083℃). The copper substrate does not melt, maintaining its original grain structure and mechanical properties. This low-temperature bonding characteristic avoids the problems of copper substrate grain coarsening, softening, and thermal stress deformation caused by localized high temperatures in resistance spot welding or laser welding.
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Capillary Filling
Liquid brazing filler metal automatically fills the joint gap under capillary action, achieving a uniform solder layer even in complex shapes. The joint gap of Copper Bar Silver Contact Attachment is typically controlled within the range of 0.05-0.15mm, allowing the brazing filler metal to fully penetrate and cover the entire bonding surface, eliminating localized incomplete soldering or porosity defects.
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Dissimilar Metal Joining
Precision Welding for Copper Parts technology effectively solves the reliable joining problem between silver and copper, two dissimilar metals, avoiding electrochemical corrosion and unstable contact resistance. Silver and copper have similar coefficients of thermal expansion (silver 19.7×10⁻⁶/K, copper 16.5×10⁻⁶/K), resulting in lower thermal stress on the solder layer during temperature changes, ensuring long-term operational reliability.
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Automation Compatibility
The brazing process of Welded Ag Contact Assemblies is easily automated. Combined with robots and vision inspection, it is suitable for high-volume, stable production. Both induction brazing and furnace brazing can be fully automated. Combined with online resistance testing and AOI appearance inspection, this ensures the consistency and traceability of each product.
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Packaging and Transportation
Inner Packaging
All Welded Silver Contact Machined Assembly products undergo rigorous anti-static treatment and moisture-proof packaging before leaving the factory. They are typically individually packaged in anti-static bags or vacuum-sealed bags with built-in desiccants to prevent silver layer oxidation and discoloration.
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Outer Packaging
The outer layer is a high-strength five-layer corrugated cardboard box, and the inner layer uses customized blister trays or divider boxes to ensure that the Silver Tipped Copper Contact Assembly products are not squeezed, bumped, or abraded during transportation.
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Marking and Labeling
Each box has a clear marking on the outside, including the product model, quantity, batch number, moisture-proof symbol, and fragile symbol, facilitating warehousing and logistics sorting.
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Logistics Solutions
We maintain long-term partnerships with internationally renowned express companies such as DHL, FedEx, and UPS, as well as major ocean freight forwarders. Whether it's urgent sample orders or large shipments, we can arrange the most cost-effective shipping solutions for you and provide full logistics tracking services.
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contact us
Given the increasingly stringent performance requirements of electrical systems for core connection components, choosing precision-engineered, proven Electrical Silver Brazing Contacts for Switch Connecting is crucial to ensuring the long-term stable operation of your equipment. Contact us today and let's work together to create the next generation of high-performance electrical connection solutions!
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