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What is a UL Suppressed Voltage Rating (SVR)?

April 26, 2017rating suppressed svr UL voltage

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What is a UL Suppressed Voltage Rating (SVR)?

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A UL SVR is a voltage rating that is assigned to every surge protector that is UL1449 tested. The manufacturer must include this rating on the front label of the protector. This rating is achieved by pulse testing the protector with a 500A (8 x 20 microsecond) pulse in various modes using six inches of wiring lead length exiting the enclosure. For example, a 120VAC surge protector might have a UL rating of 500V. This means that the protector limited the overvoltage to somewhere in the range from 401 volts to 500 volts. If the protector had a 600V rating, then the results would have fallen in the 501-600 volt range.