It is well known that temperature fuses are used to protect circuits. When the temperature produced by the electric appliance during operation exceeds the rated temperature of the fuse itself, it will automatically blow out to prevent the damage caused by overheating. So what are the reasons that affect the "life" of temperature fuses? Presumably, everyone is not very clear, so let's follow Xiaobian to understand it.
The first reason that affects the "life" of temperature fuse is the working environment temperature.
Analysis: Excessive ambient temperature will damage the life of fuse. With the oxidation of fuse from outside to inside, multiple diffusion, thermal stress fatigue and so on, the life of fuse is gradually shortened.
The second reason that affects the "life" of temperature fuse is pulse current.
Analysis: Continuous pulse impact will produce thermal cycle, which will cause diffusion, oxidation and thermal stress of fuse and accelerate. Fuses age with the increase of pulse energy and times. The impact resistance of fuse depends on fuse I2t. The fuse can withstand more than 100,000 impacts.
