Philips Support

What is Clamping Voltage?

Published on 2017-08-24

Clamping voltage is the maximum voltage allowed to pass through the circuitry to the connected equipment when tested with the UL test surge. 330 volts is the lowest rating allowed by the UL and the rating must be stated on the unit. The lower the number, the better. Other allowed ratings are 400, 600, 800, and 1000. Some manufacturers use a rating called “let through voltage” to present appearances of superior performance, but UL does not validate this terminology.

The information on this page applies to the following models: SPN5085A/10 , SPN3040A/10 , SPN5087A/10 , SPN5044A/10 , SPN4082A/10 , SPN4044A/10 , SPN4041A/10 , SPN3080A/10 , SPN5087B/10 , SPN3040B/10 , SPN4087A/10 , SPN4085A/10 , SPN4081A/10 , SPN7820/05 , SPN7840/05 , SPN8040/05 , SPN6510/05 , SPR5500/05 , SPR5540BN/05 , SPR5510/05 , SPN7810/05 , SPN7830/05 , SPN3110/05 , SPN3120/05 , SPN6500/05 , SPN6520/05 , SPN6530/05 , SPN6540/05 , SPR4500/05 , SPR5500BN/05 , SPR5520/05 , SPR5540/05 . Click here to show more product numbers Click here to show less product numbers

Contact Philips

We are happy to help you

Looking for something else?

Discover all Philips Support options

Our site can best be viewed with the latest version of Microsoft Edge, Google Chrome or Firefox.