초록 ▼

A surge resistor has a thick film resistance element containing alloyed nickel-chromium mixed with alloyed copper-nickel and less than twenty percent by weight glass. The surge resistor overcomes the limitations of the prior art by offering the unexpected advantage of improved power surge handling c

A surge resistor has a thick film resistance element containing alloyed nickel-chromium mixed with alloyed copper-nickel and less than twenty percent by weight glass. The surge resistor overcomes the limitations of the prior art by offering the unexpected advantage of improved power surge handling capacity. A thick film composition used to form the surge resistor, which also includes screening agent, is fired at temperatures generally below 1,000.degree. C., yielding a highly stable and well adhered electrical resistor. In addition to improved surge capability, the composition offers lower cost and less migration than the precious metal alternatives that the composition replaces. Additional inventive surge resistors include copper-manganese and nickel-chromium in combination with less than twenty percent by weight glass.

대표청구항 ▼

[ I claim:] [1.] A surge resistor comprising a thick film resistance material composed of between 10 and 90 parts alloyed nickel-chromium having a cold TCR of less than 200 parts per million per degree centigrade and having a hot TCR of less than 200 parts per million per degree centigrade, between

[ I claim:] [1.] A surge resistor comprising a thick film resistance material composed of between 10 and 90 parts alloyed nickel-chromium having a cold TCR of less than 200 parts per million per degree centigrade and having a hot TCR of less than 200 parts per million per degree centigrade, between 90 and 10 parts alloyed copper-nickel having a cold TCR of less than 200 parts per million per degree centigrade and having a hot TCR of less than 200 parts per million per degree centigrade, and less than twenty percent by weight glass.