Silver Tin-Oxide is a substitute of traditional Silver Cadmium-Oxide, with the characters of avirulence, find anti-melting and fireproof. In the field of electrical switch, it has won extensive attention. The craft and research result has obtained National Invention Patent, has been awarded National Technology Invention Award and Technical Improvement Award by National Defense Scientific Industry committee. Our Silver Tin-Oxide adopted the advanced artcraft of Powder Burning and Extrusion, and has improved the processability, with high alloy density and even structure, being able to offer the Silver Tin-Oxide Stannum Wire with Oxidized Stannum content around 8-12%. Application: The contact part of relay, protector, thermostat-controller, startor, circuit breaker.