抄録
Power resistors deteriorate quickly under high temperature environment, therefore, it is necessary to select good ones. But using traditional evaluating method, it takes a long time and requires a large number of samples. ln this paper, the function of a resistor was studied for evaluation. The function of a resistor is to transfer current which is proportional to voltage under any condition. The voltage/current characteristic was measured to determine the SN ratio under different temperature, individual differences and deterioration as noise factors. For deterioration, three levels of accelerated conditions were set and the changes of SN ratio was estimated by extrapolation.
