Products Description
As the primary switching interface in new energy DC contactors, power relays, and switchgear, the Silver Contact Button Assembly bears the essential tasks of current conduction and circuit interruption. The assembly-formed by bonding a silver alloy contact tip to a conductive base through a controlled metal-joining process-is deployed across energy storage systems, EV high-voltage distribution units, and industrial power electronics. Being the final execution node in the switching chain, this component defines the system's capability in handling rated current, withstanding arcing stress, and sustaining stable operation over its service life.
Product Details and Features
Denseness of the Welded/Bragging Interface
When using resistance welding, welding parameters are individually calibrated based on the material combination and geometric dimensions of the contact and base, ensuring the Silver Welding Electrical Contacts are free of porosity, cracks, and oxide inclusions. For brazing, silver-based filler metal is used in a protective atmosphere to prevent interface oxidation and maintain stable electrical and thermal conductivity over long-term operation.
Contact Geometric Accuracy Control
Length, width, thickness, and working-surface contour of the contact are all produced to the specified drawing tolerances. For a Silver Tipped Contact, this level of consistent dimensional accuracy ensures seamless integration with automated assembly equipment. Dimensional stability also underpins the repeatability of pull-in voltage and overtravel settings across the relay population, avoiding the common issue of scattered electrical parameters from unit to unit.
Base Material Compatibility
Base materials can be selected from T2 copper, brass, or copper alloys, depending on the customer's backend assembly process and current carrying requirements. Silver plating and nickel plating surface treatments can be provided upon request. The mature and mass-produced Welding with Contacts rely on diversified base material selection solutions to adapt to the assembly and current-carrying design requirements of different new energy power equipment.
Product Structure Disassembly
As the functional working layer, it directly bears the responsibility for current switching and arc erosion. Materials can be selected from pure silver (Ag 99.99%), silver-nickel alloy (AgNi), silver tin oxide (AgSnO₂), etc., selected according to current rating, load type, and environmental requirements. It is the core functional unit for achieving the electrical performance of the Welding with Contacts.
As a mechanical support layer and conductive connection layer, it provides structural strength and introduces current into the contact area. Commonly used materials are T2 copper, brass, or beryllium copper, which possess excellent electrical conductivity and brazing adaptability, serving as the fundamental carrier for ensuring assembly reliability and continuous current-carrying capacity in Silver Alloy Brazed Electrical Contacts.
Brazing Alloy Layer A silver-based brazing filler metal (such as the BAg series) is used to achieve the metallurgical connection between the silver layer and the substrate. The melting point, flowability, and wetting characteristics of the brazing filler metal are designed to be matched with the base material, relying on standardized Contact Metals Welding processes to ensure stable joint performance within the service temperature range.
Quality Control and Certification
| Incoming Material Inspection | All brazing auxiliaries, including silver alloy sheets, copper substrates, and Silver Solder Sheets, undergo incoming inspection. |
| In-Process Inspection | Temperature and pressure parameters are monitored in real time during the bonding process, and bonding strength is tested periodically to continuously stabilize the interface bonding quality of Electrical Contact Tips. |
| Finished Product Inspection | Dimensional inspection, appearance screening, contact resistance sampling, and destructive sampling testing of bonding strength are conducted to comprehensively verify all engineering indicators of Electrical Contact Buttons. |
| Compliance Certification | Products meet RoHS and REACH environmental standards, and the factory has an ISO9001 quality management system, ensuring long-term compliance and batch consistency of mass-produced Switch Contact Tips. |
contact us
To confirm the compatibility of the Silver Contact Button Assembly, obtain a detailed engineering test report, or submit customization requirements, please contact our engineering and procurement team directly. We will match you with a complete electrical contact solution for your specific new energy system scenario as soon as possible.
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