Why Tru-Block?

Tru-Block™ technology was developed in 1989 to be safer, more effective and more reliable for critical business and government applications. Tru-Block technology:

  • Does not use MOVs or degrade with use – has 1,000 worst case surge endurance.
  • Has a let-through voltage of only 330V
  • Operates effectively over a very wide voltage range – 175V MCOV
  • Comes with a 10 year warranty.
  • Is covered by many US and foreign patents.
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