... automatic control switches, thermostats, baking machines, oven, timers, thermal relays, and computers. AgCu rivet: This contact has good ... materials for substituting AgCdO. Since SnO2 has better thermal stability and higher hardness than CdO, AgSnO2 and ... more difficult to processing these two materialsUsage:Breaker,relay,contactor,timer,thermostat,train,swithes and other home appliances and ...