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What are EMI and EMS?

Latest Updated:02/01/2008


What are EMI and EMS?


EMI (Electromagnetic Interference) pertains to an electromagnetic interference regulation that eliminates influences of an electronic system on other systems, by regulating radiation and transfer of electromagnetic (electric wave) noise that leaks from the electronic system. EMI is legally regulated and standardized in Europe and the USA. The regulations in Europe are particularly stringent. In Japan, EMI is voluntarily regulated by industry.
EMS (Electromagnetic Susceptibility) pertains to immunity to electromagnetic interference with which an electronic system can operate without problem even if it receives electromagnetic noise that leaks from other electronic systems.
EMI and EMS are combined and also referred to as "EMC (Electromagnetic Compatibility)".
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