Why Use SurgeX?


  • SurgeX is an industrial-grade surge suppressor with EMI/RFI filtering.
  • SurgeX handles thousands of the largest surges normally found within a building, as defined by IEEE/ANSI C62.41-1991.
  • SurgeX is tested to Grade A, Class 1 Mode 1 of UL 1449-2 Adjunct Endurance Testing: 1000 surges of 6000 Volts and 3000 Amps.
  • Surge protectors from different companies can now be evaluated by comparing their respective Endurance Ratings (UL 1449-2 Adjunct Testing).
  • SurgeX does not divert surges to ground like MOVs - SurgeX® blocks and contains surges. The residual energy is slowly drained to neutral, not ground.
  • SurgeX never contaminates ground like MOVs.
  • SurgeX has protected equipment in actual instances of a building being hit by a lightning strike.
  • MOV-based surge protectors manufactured prior to UL 1449 Second Edition pose a fire hazard.
  • MOV-based surge protectors that meet UL 1449 Second Edition do so by incorporating a fuse that shuts off all equipment connected to the surge protector if the surge protector fails.
  • Many buildings have poor grounds. Shunt (MOV based) surge protectors rely on ground to divert surges! SurgeX® does not rely on ground to protect equipment from surges.
  • Surges or voltage transients are abnormally high pulses of voltage that substantially exceed the normal operating voltage of a circuit.
  • Surges and transients may last from tens of nanoseconds (a billionth of a second) to a few milliseconds (a thousandth of a second).
  • Integrated circuits are getting smaller and consequently the individual transistors are more sensitive to surges and transients.
  • Surge protection is no longer a luxury but a necessary part of system design.
  • MOVs cost about 50¢.

UL 1449-2

  • UL 1449-2 is safety testing. It does not guarantee performance.
  • Testing for performance is known as adjunct or endurance testing. IT has been added to UL 1449-2 as Adjunct Testing.
  • Endurance testing is not mandatory.
  • Why would any company not have their products adjunct tested...if they had confidence in their products?
  • SurgeX meets the highest grade of the UL 1449-2 Endurance Testing (A-1-1).


  • A typical lightning strike is 20,000 amps.
  • Due to the intense electric and magnetic fields, a lightning strike can induce damaging surges up to ½ mile away from the actual strike.
  • Due to arc-over at the service entrance and within building wiring, the worst case surges within a building are 6000 volts and 3000 amps (IEEE/ANSI C62.41-1991). SurgeX® is designed and tested to handle thousands of these worst-case surges.


  • Inductive transients are generated by machinery containing a motor, contactor or any inductive element.
  • Inductive transients can be generated within a building and propagate throughout the building wiring.
  • Transients that do not immediately damage equipment slowly degrade semi-conductors over time.
vs. MOVS
Does not degrade with use Sacrificial Components wear out with use
Does not contaminate ground Contaminates ground
Has superior let-through voltage Has inferior let-through voltage
Protects switched-mode power supplies used in computers Does not protect switched -mode power supplies
Meets highest grade of endurance testing Will not meet lowest grade of endurance testing
Filters transients within the power wave Does not provide filtering
Does not rely on ground to operate Relies on ground to provide protection
Does not shut off equipment in the event of a surge Post 1449-2: Will shut off equipment if MOV fails



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