In the field of low-voltage electrical appliances, the choice of electrical contact materials directly affects the conductivity, service life, and reliability of products such as switches, relays, and circuit breakers. While traditional integral precious metal contacts offer excellent arc resistance and weldability, precious metals are expensive, and some high-performance precious metal alloys have poor riveting processes, making it difficult to manufacture integral rivets. To address this contradiction, Composite Contact Rivets for Relay technology has emerged. This technology combines a precious metal electrical contact layer with a copper-based or steel-based support layer through a composite process, achieving a balance between cost and performance.
The primary advantage of dual Silver Cadmium Oxide Agcdo Electrical Contact technology lies in its significant cost savings. Precious metals are used only for the outermost electrical contact layer, while the base layer uses inexpensive metals such as copper or steel. Compared to monolithic precious metal contacts, this drastically reduces the amount of precious metal used, thereby lowering production costs. For example, composite contact rivets for relays made by bonding silver cadmium oxide (AgCdO) to a copper base can reduce precious metal consumption by 50%–70% while maintaining electrical contact performance.
The second advantage is the flexibility in material selection. Many precious metal alloys, while exhibiting excellent electrical contact properties such as arc resistance, weld resistance, and low contact resistance, suffer from poor riveting processability and are unsuitable for integral rivets. The dual composite structure leverages these advantages while mitigating these disadvantages, placing the precious metal layer only on the working surface, while using easily processable copper as the base material. For example, Silver Cadmium Electrical Contact material has excellent arc resistance, but it is relatively brittle during processing. Through a composite process, it can be made into bimetallic rivets in the form of Silver Cadmium Oxide Agcdo Electrical Contact, retaining its electrical performance advantages while solving the forming challenges.
The third advantage is high production efficiency. Agcdo Bimetal Silver Rivet Contacts are suitable for automated continuous riveting production. After riveting, no additional electroplating or welding processes are required, improving production efficiency and enhancing the assembly accuracy and reliability of electronic components. Agcdo Bimetal Silver Rivet Contacts can be directly assembled onto switch terminals using automatic riveting machines, simplifying the manufacturing process and reducing labor costs.
Agcdo Bimetal Silver Rivet Contacts are widely used in various low-voltage electrical applications requiring electrical contact. In household appliances, Silver Bimetal Rivet Contacts are commonly used as moving and stationary contacts in electric kettle switches, rice cooker rocker switches, and power switches. These applications require contacts with long switching life, reliable contact, and controllable cost, which are well met by cadmium silver oxide or nickel silver Bimetal Rivet Contacts.
In industrial electrical applications, dual composite contacts in the form of Electrical Contact Points for Switches are widely used in relays, contactors, circuit breakers, and push-button switches. Due to the high switching frequency and large load current of industrial equipment, contacts require good resistance to welding and arc erosion. Cadmium silver oxide (CdSilver) Composite Rivet Contacts excel in these applications, as their cadmium silver oxide layer effectively disperses arc energy and extends contact life.
In the automotive and electronics industries, Bimetal Rivet Electrical Contacts are used in timers, thermostats, and various electronic component switches. Their head shape can be designed in hemispherical, cylindrical, or platform shapes to accommodate different pressing pressures and contact angles. Furthermore, in high-end industrial-grade high-frequency toggle switches, Bimetal Silver Electrical Rivets achieve a cycle life of over 100,000 cycles, thanks to the low contact resistance of the precious metal layer and the excellent heat dissipation of the copper substrate.
For applications requiring both conductivity and riveting strength, Bimetal Electric Rivet Contacts offer a complete solution. The tail is made of pure copper or pure steel for easy riveting; the head features a silver alloy electrical contact layer to ensure switching performance. This structural design satisfies electrical performance requirements while simplifying assembly, making it one of the most cost-effective contact solutions in the low-voltage electrical industry.
When selecting a Button Bimetal Rivet Electrical Contact, the material combination must be determined based on the specific operating conditions. For resistive loads or low-current (≤10A) scenarios, silver-nickel/copper contacts are sufficient; for inductive loads or frequent switching scenarios, silver-cadmium oxide/copper contacts are recommended; for export products with strict environmental requirements, silver-tin oxide can be used instead of silver-cadmium oxide. Furthermore, the contact head diameter, thickness, and tail length must match the riveting equipment; it is recommended to conduct sample verification before mass production.
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