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!


Featured Threat Type – Lightning Protection for Radio and Communication Lines

Although probably our best-known type of solution, we wanted to take the opportunity to start off 2017 by highlighting Lightning Protection for coaxial RF applications.  Fundamentally, the purpose of these devices is to provide high-performance Lightning & Surge Protection for Radio and Electronic Systems and their Users.  This can be as simple as protecting a radio itself, or as complex as providing protection to the entire platform or system the protection is being installed upon.


Simplified Diagram Showing Typical Wireless Communications Installation – Potential Arrestor Placement Areas are A, B, and C.

You can see the common areas where protection is installed called out as A, B, and C in the diagram above.  This is an over-simplification and does not exactly represent most actual installations, but it does a good job representing the various ways and reasons that a coaxial cable can be installed outside and therefore represent a potential ingress path for Transient Lightning Energy.


Wireless Installation - Building Rooftop

Lightning damage is a leading cause of radio damage in many locations and systems around the world.  Anywhere a coaxial cable or radio antenna is run outside in an exposed location, there is a potential need for an arrestor/protector on the line as well.


While we do specialize in coaxial connectorized solutions where RF Energy must be passed during normal usage, we also do have many years of experience in designing and consulting on all sorts of Surge Protection devices… From Lightning Arrestors for AC, DC, or Serial/Comms lines, to providing multi-faceted protection that is as effective against Static/ESD and HEMP/NEMP energy as it is against standard Lightning transients.


LEARN MORE

Lightning – Threat Type Page

Coaxial Lightning Arrestors – Product Family Page

Technical Resources – Technical Note, Articles, and More Info



Product Bulletin – Integrate RF Surge and Lightning Protection Without Paying a Size or Weight Penalty!

The Neverending Quest For Size Reduction

As with most technologies, RF and Wireless system design is an ever-changing and shifting world.  As certain technologies or RF bands become popular, others fade away.

However, the one ever-present force on the industry is the steady, but relentless, push towards smaller size and better integration over time.

Lightning/Surge Protection at the PCB Level?

Here at NexTek we understand the desire to bring things into the box, or even all the way onto the Radio PCB… However, we also know that Lightning Transients contain too much energy to deal with safely at the PCB Level… Trace widths, ground place areas, and the components themselves all become limiting factors that will prevent complete and effective protection.

Given this reality, the last place where it is reasonable and safe to protect against Lightning or other Surge events is at the radio’s box or chassis level.  By replacing the normal I/O connector with a protected version, designer can ensure that they have high-performance protection without paying any significant size or weight penalty.  As long as the radio’s chassis is grounded well, the bulk of the Transient Energy will be drained safely to ground before entering the box and/or the PCB itself.

It may still be advisable to install some simple protection on the PCB, but only for final clean-up…Something like a small Protection Diode coupled with a DC Blocking Capacitor (if possible for your application) would provide plenty of protection against any residual energy that gets past the Protected I/O Connector.

Maximum Protection in the Minimum Amount of Space

Below, you can see an array of our Ultra-Compact protection options…  They all include high-performance lightning protection, and are available in a wide variety of connector configurations on both the Input and Output side.compact-arrestors

Outside Connector Options – Type N, TNC, SMA

Inside Connector Options – SMA, MMCX, RG188, RG316, and more!

Threat Types – Lightning, Static (ESD), and EMP


Learn More

Ultra Compact Protection – Home Page

Ultra Compact Protection Product Bulletin – Post



Did You Know? – NexTek EMI Filters Are Used In Medical Equipment to Prevent Unwanted Electrical Interference

Where Are These Filters Used?

High Current EMI Filters are commonly used on high power feed lines within MRI Machines and high-power Medical Lasers, in order to prevent any electronic interference issues and provide full Electromagnetic Compliance to common Medical Equipment regulations.EMI Diagram - CC0

EMI Filters can be required on the Noise Source or the potential Noise Victim, and sometimes are installed on a certain line for both reasons!  A filter installed on a properly shielded barrier will provide fully bi-directional protection.

What Types Of Medical Equipment?

In terms of devices that are likely to have a high-current connection and EMC requirements…MRI Machines and Medical Lasers are the most common types that might require a high current filter.

MRI - CC0

What Makes These EMI Filters Effective For the Application?

Our HPR Series filters are the Most Compact units available for their current ratings, and combined with Excellent Filtering Performance and an especially Rugged Design they are ideally suited for any high-current DC or AC filtering application.   Medical equipment is subject to some of the most stringent EMC requirements of any industry, mostly because in most medical facilities there is a lot of equipment operating in close proximity with each other.  Combine the crowded environment with the fact that people’s lives may be on the line when this equipment is being used, and you have the perfect explanation for the tough EMC requirements.

Heart Rate Monitor - CC0


Learn More

Medical Devices – Industry Page

HPR Series EMI Filters – Product Page



Compact Surge Protection – New Product Bulletin Available!


We are happy to announce the recent release of a brand-new two-page bulletin and brochure, featuring our range of compact high-performance arrestors.  Whether you are working on a new design, or trying to retrofit something onto an existing one…these ultra-small options are ideal for any application where size is a critical design factor.

Instead of trying to add some (likely inadequate) transient protection on-board, or having to go all the way to a traditional external arrestor mounted somewhere on the cable run…It is now possible to integrate world-class protection against Lightning, Static (ESD) or High-Speed EMP into a bulkhead connector that will easily replace most existing I/O feedthrus!

With the wide array of connector options and frequency ranges available, you should be able to find a solution for any application.  Learn more and download the new Product Bulletin by following the jump below;


Learn More:

Compact Surge Protection for Coaxial RF Applications – Home Page

Ultra Compact Lightning Protection – Post #2



Compact Lightning Protection for Radios Operating Up To 12.5GHz – High Performance G-Class Arrestors

LIghtning Arrestor, TNC to SMA, Bulkhead-Mount, DC to 12GHz


Available with SMA and TNC connectors, our G-Class arrestors (The PTCSAFSAF20G and the PTCTNFSAF20G, for example) cover a wider RF Band than any other coaxial protection design in the world.  Because of the exceptional wideband performance from DC all the way up to 11 or 12.5GHz, there is no arrestor available today that will cover the same number of potential applications.  When the wideband ratings are combined with the extremely small form factor of these units, there is truly no other arrestor out there which can come close.

These units are perfect for retrofit or other installations where space is at a premium, or those who simply want a high quality protector that takes up minimal space!  In fact, these fully featured lightning arrestors barely take up any more space than a typical connector feedthru that contains no protection at all!
Also, keep in mind that like all NexTek solutions….
  • All G-Class arrestors are Designed, Engineered, Assembled, and Tested here in the United States!
  • This design incorporates 30 Years of Experience and Expertise into every feature and detail.
  • They are truly High Quality Advanced Designs, ready for the most demanding applications.

PTC-G-Class

If you would like to see for yourself, just ask us for a Sample or More Information!


Learn More

PTCSAFSAF20G – SMA to SMA, DC to 12.5GHz

PTCTNFSAF20G – TNC to SMA, DC to 11GHz

PTC Series – Product Family Page



Extremely Compact Lightning Arrestor Ideal for Mounting Inside Radio Chassis – New Product Release – PTCTNFMMFxxS

We are excited to announce the release of a brand-new Coaxial Arrestor design, the PTCTNFMMFxxS series of compact GDT arrestors.  Just like other examples of NexTek’s compact arrestor options, this unit is perfect for chassis-mount applications where space is at a premium…But at the same time, it provides heavy duty, military grade protection for your equipment and will not cost much more than a high-quality connector!

PTCTNFMMFxxS Photo

If you are looking for coaxial protection that does not cost you any more space and weight than absolutely necessary, perhaps because you’d prefer to integrate protection into the Radio Chassis itself, then you really have to check out this new design!

The PTCTNFMMFxxS-series coaxial arrester provides effective protection in an extremely compact form factor, and MMCX connectors for the lowest-profile connection.

PTCTNFMMFxxS OutlineAvailable with a TNC (f) bulkhead and MMCX (f) connectors, in a range of Protection Voltage/RF Power ratings.  See below and explore the datasheets to learn additional details!


Features:

  • DC to 6GHz Operating Band
  • Excellent Response and Residual Energy Reduction
  • Compact TNC to MMCX Bulkhead Protector
  • Low VSWR and Insertion Loss
  • Multi-strike, Rugged and Waterproof
  • Available in Multiple Protection Voltages: 90, 150, and 230V

Product Page Links:

PTCTNFMMF09S

PTCTNFMMF15S

PTCTNFMMF23S


Learn More:

PTCTNFMMFxxS Datasheet (.PDF)

PTC Series Home Page

Coaxial Arrestor Home Page



Lightning Arrestor Enables GPS Systems to Run Without Downtime! – FPL Series Highlight

Our FPL Series of GPS Lightning Arrestors have been providing security and confidence to users of GPS Positioning and Timing Synchronization Systems around the world for over 10 years! These multi-stage protectors provide the fastest-acting surge protection available for DC Pass GPS and Global Navigation Band applications operating between 1.15 and 1.61 GHz.


FPL-FPN Circuit Diagram


The special multi-stage design incorporates a Gas Discharge Tube first stage, similar to what is used in NexTek’s PTC and PTR series GDT arrestors. However, as most GPS Receivers are quite sensitive to OverVoltage and Surge Related Damage…a Gas Discharge Tube alone is often not enough to provide adequate clamping by itself.  Because of this, there are additional protection elements inside every FPL series arrestor including a Metal Oxide Varistor and a fast-acting Clamping Diode.

In addition to the enhanced protection provided by the multistageFine Protector” circuit inside, the FPL series provides a compact form factor that is easy to integrate into any design and impressive environmental ratings, including being waterproof to IP68 levels!


FPLNFNF


FPL Series Arrestor Highlights:
  • Military Grade
  • Low Cost at OEM Quantities
  • Best Protection Level Available
  • Compact Form Factor
  • Environmental Ratings
For the best surge and lightning protection for any GPS Radio, Antenna, or Receiver setup…The NexTek FPL series will provide long-lasting protection in any environment and will give you the confidence in knowing that your system is protected!

Learn More

FPL Series – Product Family Page
GPS/Timing – Technology Page
FPLNFNFBP05 – Example FPL Series Product
GPS Application Spotlight – Blog Post


Three Critical Factors for Comparing and Selecting an EMI Filter

There are three major criterion to pay attention to when comparing different EMI filters and trying to select the proper solution for a given application.


C-Type Filter Comparison

  • Filtering Performance

    • As filtering performance is the reason for any filter to exist in the first place, this is a crucial selection factor.
      • All filters are not created equal, both in terms of Maximum Insertion Loss and their performance up to High Frequencies (MHz to GHz+ range.)
      • Look for filters which maintain a high level of Insertion Loss through and beyond your major Frequency of Concern.

Learn More


 

US_Army_M-ATV_and_MRAP_MaxxPro_Dash_in_Afghanistan

  • Ruggedness and Ratings

    • For many applications where there are extreme environmental requirements such as Extreme Temperature Ranges, Shock & Vibration, and others are present…A filter’s ratings and performance across every type of application are an important way to vet any component for use in harsh environments
      • Some filters have extremely limited Temperature Range Ratings, especially in terms of Maximum Temperature
      • Some filters have a limited ability to withstand Shock and Vibration, and therefore would not be suitable for any type of mobile application.

Learn More


 

300 Ampere Rated Feedthru Filter - HPR300

  • Size and Form Factor

    • For most applications Size and Weight are important design considerations, and for many applications they are absolutely critical.
      • Compare filters with equivalent Filtering Performance and Current Ratings to determine the most compact option available!
      • Compare wire lug or busbar attachment styles to determine the ideal solution for your application.

Learn More


 

Learn More:

High Current Filters – Product Home

High Current Filters – Extreme Series (Burned-In)

Education Center