Coming Soon To Our Lineup… A High Current Pi-Filter (C-L-C) for Maximum EMI Suppression

We have been designing and building feedthrough EMI Filters for high current (30Amps and above) AC and DC applications for nearly 30 years now. There have been multiple design iterations and some important innovations over this time period, but our filter products have been limited to C-Type filters only.
However, this is all about to change! Coming soon, we have a brand-new Pi Filter design for high-current applications. C-L-C Circuit Design means a sharper Insertion Loss curve once the filter turns on, and higher maximum filtering figures approaching 100dB of Loss.

A Small Preview of Design Features:

  • C-L-C aka Pi Filter Configuration
  • Extremely Compact Package for 180Amperes of Thru-Current
  • Available in a Wide Range of AC and DC Voltage Ratings
  • Optional Transient Suppression Available

Expect to learn more over the coming months as Datasheets, Product Pages, and more information will be available soon!

Our Sales Team Continues To Expand! – Spartech South Announced as NexTek’s Sales Representation for the Southeast US

We are extremely proud to announce that NexTek has formed another new partnership for 2016, a Sales Representation agreement with Spartech South to cover the Southeastern states ranging from North Carolina all the way to Mississippi and including Florida and Tennessee as well!

Spartech South will cover Region 3, shown on the updated map below in Yellow.

US_states_and_territories_ - NT Reps MapIf you would like to know more about NexTek or our solutions for Lightning and Surge Protection of Coaxial/RF lines or High Current Feedthrough EMI filtering, please feel free to contact your local/regional Representative directly, or simply get in touch with us directly and we will guide you to the correct local contacts!

Once again, we are proud to announce that Spartech South has joined our team… We look forward to helping them serve the area that sees the most Lightning Strikes and Thunderstorms out of anywhere in the United States!

Click through to Spartech South’s website:

Spartech South Logo


Visit our Domestic Reps and Distributors page for more information:

Rep and Disty Graphic


Did You Know?: NexTek Feedthrough Filters Enable Laser System EMC Compliance

Laser Cutting Head

Are you developing a Laser System for Industrial, Medical, or other Commercial use?  Is your system prepared for regulatory compliance testing, specifically EMC testing for Emissions and Susceptibility?  Have you identified a filter solution that is rated for enough current but also compact enough to fit almost anywhere?

HPR Filter - Before and After

You don’t have to look any further…. For years, NexTek HPR series filters have been trusted to ensure Industrial Laser systems are fully protected against all EMC-related threats.

High Power Laser systems are demanding applications, and NexTek’s HPR series are the preferred High Current EMI solution for some of the world’s leading Industrial Laser Manufacturers.

When high performance, compact size, and high current ratings are required…NexTek EMI Filters are the solution!

HPR Feedthrough Filter (HPR140) - Installation Example

Learn More:

Lasers – Filter Market Page

High Current Filters – Home Page

Product Design Spotlight – EMI Filters: High Frequency Filtering Performance

High Current Feedthrough Filter - Installation ExampleAs one of NexTek’s primary product lines, our range of High Current Feedthrough EMI Filters incorporate some advanced design features which make them unique. NexTek HPR Series filters are high-performance, military-grade designs that are built under stringent quality control systems and procedures. This post will focus on the High Frequency Filtering performance of NexTek’s HPR Series of EMI/RFI filters.

Why does High Frequency Filtering Performance matter?: The primary purpose of a feedthrough EMI/RFI filter is to eliminate radio frequency noise from a power cable. Maintaining adequate filtering performance to 1GHz and above ensures that noise in this frequency range can be effectively removed.

How do NexTek Solutions Differ?: Available high-current feedthrough filter solutions from other manufacturers’ do not use the same type of design, and this means that their filtering performance (as limited by the package and overall design) reaches a peak value and then falls off quickly afterward. In this case, maximum insertion loss is only achieved over a narrow band and the filter’s performance in the upper

C-Type Filter Comparison
C-Type Filter Comparison – NexTek HPRs Use Ceramic Caps (Red Line)

MHz ranges is limited and continues to get worse as the frequency rises.

With the HPR series, the design has been optimized to maintain excellent filtering and loss characteristics to and beyond 1GHz. There is no other C-type filter family available with similarly excellent high-frequency performance.

Practical Example: Let us say that a given power supply is emitting noise in the 500MHz range, and a filter must be found and selected to ensure compliance with an applicable EMI Emissions industry standard. When exploring the market to identify possible solutions, it becomes clear that most feedthrough filters for high-current lines do not maintain maximum filtering performance to 500MHz. On the other hand, NexTek’s HPR series of feedthrough filter designs maintain relatively flat Insertion Loss performance through 1GHz. In this case, the direct filtering level comparison (xx dB down at 500MHz) demonstrates that the HPR series provides superior performance and is well-suited to this application.

Summary: NexTek HPR Series of EMI/RFI feedthrough filters incorporate some advance design techniques that are unique within the industry, allowing high filtering performance to be maintained to extremely high frequency ranges. When this high filtering performance is combined with other design factors such as their compact size, extremely rugged construction, and wide range of available Cap Values and Voltage Ratings…the HPR series of filters are leading-edge solutions.

Learn More:

Product Family Page – High Current Filters (link)

Article – High Current Filtering, Pt 1 (link to blog post)

Article – High Current Filtering, Pt 2 (link to blog post)

Resources Page (link)