TDS PDF

Secondary Protectors for Communications Circuits (Edition 3, published March 20, 2001; revisions through December 3, 2024). Original standard UL 497A 2024-12 in PDF full version. Additional info + preview on request

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Protectors for Data Communications and Fire-Alarm Circuits (Edition 4, published June 14, 2004; revisions through February 10, 2017; ANSI reaffirmation 2017). Original standard UL 497B 2017-02 in PDF full version. Additional info + preview on request

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Protectors for Data Communications and Fire-Alarm Circuits (Edition 4, published June 14, 2004; revisions through February 7, 2022; ANSI reaffirmation 2022). Original standard UL 497B 2022-02 in PDF full version. Additional info + preview on request

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Protectors for Coaxial Communications Circuits (Edition 2, published August 3, 2001; revisions through February 10, 2017; ANSI reaffirmation 2017). Original standard UL 497C 2017-02 in PDF full version. Additional info + preview on request

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Protectors for Coaxial Communications Circuits (Edition 2, published August 3, 2001; revisions through February 7, 2022; ANSI reaffirmation 2022). Original standard UL 497C 2022-02 in PDF full version. Additional info + preview on request

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Outline of Investigation for Component Secondary Protectors for Communications Circuits Used with Specified Voltage Suppression (Issue 1; published 2007-11-01). Original standard UL 497D 2007-11 in PDF full version. Additional info + preview on request

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