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iQ means Interoperability Quotient, and is our proprietary, patented technology which allows the use of identical components on all of the Concentric Devices' product lines. This allows all our products to act effectively and efficiently together. Learn more...

Just some of the benefits to terminal block design and implementation through iQ Technology are captive hardware, faster termination, greater design flexibility, increased safety, laser strip ID, and higher circuit density. Read more...


Concentric Devices terminal blocks are manufactured in the United States to the most demanding specifications. See the entire physical specifications list.

iQ technology produces the terminal block with the fastest installation and termination, safest operation and best circuit identification available. View the product.

Fully captive hardware and isolated electrical paths provide the safest and fastest way to shunt circuits for CT testing. A simple turn of a screw does it. No lost hardware, ever. View the product.

Interruptible Link provides circuit opening with captive hardware and isolated electrical paths. No loose hardware or potential contact with live buss bars. A simple turn of a screw does it. View the product.

For maximum design flexibility and circuit density, use din rail mounting.

For those customers who want to stick with traditional panel mounting, our panel-mount hardware fits all major patterns for screwmounting, making switching to our terminal blocks simple. Read more...

Never loose track of circuits again. Customize, laser etched ID strips identify your specific circuit. Find out more...


"iQ" is the "interoperability Quotient", which is Concentric Devices' proprietary, patented technology using compatible components and designs to produce a fully integrated interconnect solution with maximum density, greatest safety and lowest installed cost.

Overview of iQ Technology:

  • All connections and terminations are made with captive hardware.
  • All connections and terminations have visible indications that they are made.
  • All electrical paths are fully isolated from contact.
  • All products have the same foot print in your panel.
  • All products have individual circuit identification.
  • Any product is quickly interchangeable to modify the function of specific circuits.
  • Any product when installed on DIN rail provides the greatest circuit density and speed of installation.
  • All products are "interoperable" to provide the greatest design flexibility.
  • All products are easily identifiable by vivid color, which indicates their function.

See a complete list of all the features and benefits of this new technology.