Silver Contact Buttons
Products Description
Silver contact buttons are electrical contact products made of silver-based alloy materials. They are used in conjunction with copper, brass, or other conductive supports through brazing, fusion welding, or diffusion welding.
Unlike rivet contacts, welded contacts do not have a rivet structure; instead, they are installed as independent contacts on the conductor surface, thus offering greater design flexibility and wider application adaptability.
Based on product structure, they can be divided into:
Flat Silver Contact
Disc Silver Contact
Square Silver Contact
Special Shape Silver Contact
Silver Alloy Welding Contact
Bimetal Silver Contact
Product dimensions, thickness, material system, and welding methods can all be customized according to customer designs.
Design Advantages: Microscopic Surface Pressure Management and Topology Optimization of Welding Interface
| Micro-arc Crown Surface Pressure Distribution Design | An absolutely flat surface is prone to edge-first contact during closure, resulting in edge arc burnout. We perform nano- to micro-level micro-arc crown shaping on the surface of the Square Silver Contact to ensure that the maximum pressure falls precisely at the geometric center at the moment of contact closure, achieving the ideal contact mode of "center-first conduction, surface pressure diffuses outward," significantly suppressing bouncing arcs. |
| End Face Chamfering and Deburring Structure | The tiny burrs generated by blanking are the source of corona discharge under high-voltage electric fields. We design precise chamfers or rounded transitions at the Electrical Terminals Silver Contact Points edges to eliminate the tip discharge effect and improve dielectric recovery strength. |
| Back Welding Surface Micro-texture Treatment | For the welding surface, a special finishing process is used to form a micro-textured concave-convex structure. This not only stores flux or brazing filler metal, but also increases the local current density during resistance welding, promoting the rapid formation and atomic diffusion of the welding core, and achieving high-strength metallurgical anchoring. |
Technical Features – A Holistic Engineering Consideration from Welding End to Contact End
Microstructure Design of the Welding Surface
To facilitate resistance welding, we can provide "cross-shaped embossing" or "dot-like protrusions" on the back of the Circular Silver Contact piece. These micro-protrusions generate concentrated current in the early stages of welding, promoting rapid weld nugget formation, reducing spatter, and improving weld consistency.
Flatness and Parallelism
Both sides of the Silver Contact Disc piece must be highly parallel; otherwise, uneven pressure during welding will lead to one-sided spatter or weld misalignment. We specify that the flatness of contact pieces with a diameter of less than 10mm should be ≤0.03mm, and for larger diameters, ≤0.05mm. Each batch of products is sampled and inspected using a laser flatness meter.
Edge Rounding
All sharp edges are micro-rounded (R0.1~0.2mm) to prevent sharp discharge during welding or use, while also protecting the fingers of assembly personnel from scratches.
Application Advantages: Customized for Heavy-Duty and Complex Operating Conditions
Our Switch Contact Tips are widely used in various control circuits requiring extreme reliability:
Industrial Control Core Components: Smart Grid Heavy-Duty Circuit Breakers, Vacuum Circuit Breakers, AC Contactors.
Rail Transit and Electric Vehicles: High-Voltage DC Contactors (EV Relays), Locomotive Main Control Switches, Charging Pile Core Protection Modules.
Heavy Machinery Electric Drives: Motor Starter Switches, High-Power Industrial Temperature Control Switches.
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Whether it's standard Electrical Contact Buttons or custom Silver Contact Buttons developed for new energy relays, contactors, and high-reliability switching systems, we can provide complete engineering support from material selection, structural design, welding processes, to mass production, helping your products achieve more stable electrical performance and a longer service life. Feel free to submit drawings or technical requirements to our engineering team for further discussion.
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