NOsparc® Arc Suppressors …

Because Every Cycle Counts!


Arc Suppression Technologies Value Proposition: Every Cycle Counts!

Arc Suppression Technologies Value Proposition: Every Cycle Counts! From Left to Right:
– Relays last longer, have lower emissions, and cause less pollution using NOsparc® arc suppressors.
– Relays using NOsparc® help to protect systems from unplanned failures and cam lessen the need for planned maintenance.
– Less planned maintenance and fewer unplanned failures save both time and money.
– Less maintenance and repair keeps personnel safe; and will ultimately allow for safer maintenance and repair.


Relays, contactors, and snap-action switches work better with contact arc suppression!


ABOVE TOP: pictures of contacts after 100,000 operations without arc suppression and unsuppressed relay schematic.
ABOVE MIDDLE: pictures of unused contacts.
ABOVE BOTTOM: pictures of contacts after 1 million operations with arc suppression, arc suppressed relay schematic. For more information see our Lab Notes page.

Arc Suppression Technologies designs, manufactures, and markets the NOsparc® family of contact arc suppressors that protect relays, or contactors from the destructive arc energy created in power switching.Contact arcing causes significant surface damage to the contact in relays or contactors.

Our advanced arc suppression products virtually eliminate undesired arcing by adding the advantages of solid-state switching to the durability and current carrying capacity of electromechanical relays or contactors. This increases the overall lifetime, reliability, and safety, and decreases environmental impact of today’s power switching products to unprecedented capabilities.

Relays and contactors operating without load current may run 10 million, 20 million or even more operations (cycles). This mechanical lifespan, however, is reduced to as few as a few hundred operations to perhaps 100,000 operations (depending on application) when the relay or contactor is operated under power.

The Laws of Contact Arc Suppression

  • An Arc Suppression Device must activate during contact transitions from closed to open.
  • An Arc Suppression Device must suppress the inrush and the carry contact current.
  • An Arc Suppression Device must not inadvertently activate during the contact open state.



NOsparc® Technology

Like a fire suppression system, actively looking for the instant of combustion; our arc suppression products actively look for the occurrence of thermionic ignition induced by current constriction. When detected, the arc suppression active circuitry extinguishes the arc. Arc suppression is not active when the contacts are open or closed. Alternative technologies passively anticipate the arc. They are not actively detecting the instant of arc ignition, limiting their success. The industry has accepted this problem for over 125 years. We now offer a solution.








DEMO: Unsuppressed vs. Suppressed Arcing

Below is a brief video showing the dramatic difference between unsuppressed and suppressed contact current arcing:

Demo Test Note:Operate a general purpose “icecube”-style relay switching a resistive load under two separate test conditions: (1) With no suppression element, and (2) With a NOsparc® MMXAC arc suppressor connected across the relay contacts.



Information on this site is subject to change without notice. “NOsparc” and the flame logo are trademarks of Arc Suppression Technologies, LLC. Other names are trademarks of their respective companies.