Products Description
This Silver Tin Oxide Soldering Silver Contacts is a weldable silver-based electrical contact, firmly bonded to a copper-based or alloy substrate via solder or brazing to form a stable, conductive, and mechanical connection.
Basic Forms:
Flat Contact
Disc Contact
Customized Profile Flat Contact
Structural Features:
Dense, continuous silver-based phase ensures low contact resistance.
SnO₂ is uniformly dispersed within the silver substrate, forming a stable arc-resistant framework.
Surface finish suitable for welding, requiring no complex secondary treatment.
Dimensions and thickness can be customized to meet assembly space and current-carrying requirements.
Technical Features: Microstructure Determines Macroscopic Lifespan
Dispersion Strengthening Mechanism
We utilize the uniform dispersion of nano-sized tin oxide particles within a silver matrix to significantly enhance the material's viscosity at the moment of breakage, effectively reducing arc erosion losses caused by spatter.
Optimized Interface Wetness
A core challenge in weldable contacts is "cold solder joints." We pre-place a high-purity silver layer or ternary alloy solder on the welding surface of the Spot welding Silver Contact, combined with micro-texturing treatment, ensuring atomic-level bonding between the contacts and the copper support during high-temperature welding, allowing them to withstand millions of breaks without delamination.
Thermodynamic Stability
Silver tin oxide materials possess excellent thermal stability. Even under continuous high-power cycling, its surface oxides do not easily aggregate or drift, ensuring long-term stability of Butt welding Silver Contact resistance.
Design and Application Advantages: Seamless integration into your production line
Optimized geometry for flat and circular wafers
Ultra-thin design: We can produce precision flat wafers as thin as 0.2mm, suitable for space-constrained miniature circuit breakers.
Anti-misassembly features: Special positioning points can be designed on the reverse side of the Silver solder sheet, facilitating automated vision systems to identify the correct orientation and improving assembly efficiency.
Broad Application Coverage
Low-voltage distribution: Static contacts for molded case circuit breakers (MCCBs) and miniature circuit breakers (MCBs).
Industrial control: AC contactors, magnetic starters, and power relays.
New energy: Photovoltaic inverter switches, DC charging pile protectors, and high-voltage relays for new energy vehicles.
Product Advantages: Dual Benefits of Environmental Compliance and Performance Enhancement
Fully RoHS & REACH Compliant
AgSnO2 is a recognized environmentally friendly material, completely replacing toxic AgCdO. Using this product can help your electrical equipment smoothly enter markets with extremely high environmental requirements, such as Europe and the United States, mitigating compliance risks.
Superior Arc Erosion Resistance
Compared to pure silver contacts, AgSnO2 forms a "viscous liquid film" under the high temperature of an electric arc, effectively inhibiting the deep erosion of the contact substrate by the arc. This means that under the same operating conditions, our Buttons Contacts have a longer service life and require less frequent equipment maintenance.
Excellent Material Transfer Resistance
Under direct current (DC) loads, Square silver welding sheets often exhibit a "directional migration" phenomenon, where material transfers from one contact to another. AgSnO2's unique microstructure effectively inhibits this transfer, maintains the smoothness of the contact surface, and prevents contact failure caused by bumps or pits.
contact us
If your project has specific engineering requirements for the reliability, consistency, and long-term electrical stability of the contacts, our silver-tin oxide soldered silver contacts can be used for matching during the design phase. Please contact our engineering team for technical support and selection advice.
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