With the development of science and technology, the varistors have been used more and more widely. The common ones are power supply systems, surge suppressors, security systems, motor protection, automotive electronic systems, household appliances, etc. So how do we evaluate the service life of varistors? Read this article to find out.
Varistors installed in important places, important equipment, and places that are difficult for people to reach are required to meet the specified service life, such as 10 years or 20 years. The service life of varistors is evaluated from two aspects: pulse current service life and voltage temperature (U-T) service life. The former is measured by the “pulse current times” that the varistor can withstand, and the pulse current is expressed in terms of peak value and equivalent square wave width. The latter is expressed in terms of the mean service life time before failure under the specified maximum continuous working voltage and the specified harsh environmental conditions (temperature, humidity, etc.).
In the same group of products, each individual product under the same stress often has several times different service life lengths. So, which service life data should be used to represent the service life of this group of products? What needs to be emphasized here is that when assessing the service life of a group of products, it usually means that the group of products has passed the correct reliability screening process, and those hidden abnormal manufacturing defects have been eliminated.
The above content is about the service life of varistors. Select a reliable manufacturer when purchasing electronic components can avoid a lot of unnecessary trouble. JYH HSU(JEC) (or Dongguan Zhixu Electronics) not only has full models of ceramic capacitors with guaranteed quality, but also offers worry-free after-sales. JEC factories are ISO 9000 and ISO 14000 certified. Welcome to contact us: https://www.jeccapacitor.com
Post time: Dec-21-2022