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.

Patented, Award Winning, Revolutionary

Tru-Block technology that is a true 1st line of defense against worst case surges.  Safer, more effective and more reliable than traditional panel mounted systems.

Tru-Block is a failure-free alternative to MOV based whole building surge protection systems. Meets the exacting needs of electrical contractors and supply houses.

Now Available From Select Distributors.

While initially developed for critical business and government applications, Tru-Block™ products are now available through select distributors.

Call 800-996-6696 or click here to learn more.

Made right here in the USA!

That’s right! All Tru-Block products are made exclusively in the U.S. But that’s not all. We make every effort to source the quality components that go into Tru-Block products here at home too.

Surge-protection you can rely on

Tru-Block products have withstood the test of time (no surge failures or fires in the company’s history), and every unit is 100% computerized surge tested as part of our quality assurance program.