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Ensure Safe System Operation with Certified Isolator Devices

Authored on: Apr 11, 2012 by Harold Tisbe

Technical Paper

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Isolation components such as optocouplers that are used in applications that have user safety issues as a key aspect must not fail under continuous high-working-voltage bias conditions. Safety hazards exist and human life is at risk when such insulation fails and the high voltages come in contact with the user. To prevent such occurrences, continuous working voltage ratings and test methodologies are regulated by international component standards and equipment safety standards. The practice of using optocoupler test methods for alternative isolators has raised concerns and questions. This paper is intended to provide experimental test data and analysis to address such concerns.

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