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This paper analyzed the impact on the reliability of SSR from the opto-couplers and SCR, which are both the key devices that are easy to failure in solid state relays. Analysis shows the main factors of impacting the reliability of solid-state relay are heat stress and electrical stress. At last, this paper introduces the current research status of solid state relays reliability:Heat stress and heat management is the current research focus and the experiment and computer simulation are the two main methods.

KEYWORDS

Solid State Relay , Reliability, Thermal Stress, Electric Stress

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Author: Hudong Zhang, Xiaowen Zhang

Source: http://www.scirp.org/



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