The increase of temperature will reduce the resistance value of resistance and shorten the service life of capacitor. In addition, high temperature will reduce the performance of transformer and related insulating materials. Too high temperature will also cause changes in the alloy structure of solder joints on PCB: IMC thickening, solder joint embrittlement, tin whisker growth, mechanical strength reduction. The increase of junction temperature will rapidly increase the current amplification factor of transistor, resulting in the increase of collector current, It also makes the junction temperature rise further, and eventually leads to component failure.
