a. Small size, high power, fast response speed, strong ability to suppress surge current
b. Long service life, high reliability, strong overload capacity, easy to process complex shapes, and mass production
c. High sensitivity, the temperature coefficient of resistance is more than 10-100 times larger than that of metal, and it can be measured
10-6℃ temperature change
d. Wide operating temperature range, room temperature devices are suitable for -55-315 ℃