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 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.
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.
Medical Devices – Industry Page
HPR Series EMI Filters – Product Page
You Might Not Know; Just as our line of Power Filters are used to provide EMC compliance for a wide variety of military and government applications, our line of Surge Arrestors for coaxial RF lines are also in-use on an wide range of systems worldwide!
Whether they are installed on a Permanent Installation or a Land Vehicle, Ship, or Airborne Vehicle… Our surge arrestors provide the type of rugged performance and long lifetime that any Military or Government user demands. Solutions range from standard off-the-shelf units all the way to fully-custom solutions developed to meet a complex or special set of requirements.
We can provide protection against any threat type, including;
With the proliferation and continued growth of the use of Radios and Radio-based technology (sensors like radar, communications, even electronic warfare [EW]) across all military equipment and systems, there are a growing number of requirements for Lightning and Surge protection to ensure that mission-critical equipment and capabilities remain up and working properly at all times!
In fact, NexTek was formed as an EMC engineering consultant outfit, and our first contracts ever were in the Military world. With this type of experience and pedigree, you can be confident that your NexTek arrestor will provide protection, performance, and trouble-free operation…whether you are using it in a Mil/Gov application or not!
Using COTS Arrestors in Defense Applications – Article Spotlight (Blog Post & Article Link)
Coaxial Surge Protection (Home Page)
Military Electronics (What We Do – Industry Page)
Today’s Featured Application and Did You Know? topic covers NexTek HPR series power filters and the fact that they are used in radar power supply systems around the world. We have EMI filters installed in fixed ground, land and sea mobile, and also airborne radar systems to help enable compliance with applicable EMI and RFI requirements at the system-level.
See below for an example of a ground mobile radar system where HPR series filters could be used, usually mounted within the Power Supply sub-system.
Unique Features that make HPR Series Feedthrough Power Filters ideally suited to these applications;
- Robust and Rugged Design – High Performance in any Environment
- Compact Size and Form Factor – Save the Maximum Amount of Space and Weight
- Filtering Performance to 1GHz+ – Exceptional High Frequency Filtering Performance
- High Reliability Units Available – Burnt-In Units for Maximum Reliability
No matter what type of radar system is being designed, NexTek HPR Series EMI and RFI filter solutions for power lines are uniquely suited for the challenge!
See the gallery below:
The DO-160 Series (currently DO-160G) regulations regarding Avionics cover a wide range of test requirements that every piece of certified Avionics equipment must comply with. With the range of requirements covered under this wide-reaching document, covering everything from Temperature Range and Vibration Ratings to EMI Susceptibility and Lightning Protection. Learn more about DO-160 and it’s various subsections by following the Wikipedia link below:
NexTek Arrestors and Filters are used to address DO-160G EMI and Surge Protection Requirements, respectively.
We have Coaxial Surge Protection solutions ranging from standard Off-The-Shelf to modified or fully custom for the following subsections;
- Section 17: Voltage Spike Transients
- Section 19: Relay Switching Transients
- Section 22: Lightning Transients
- Section 25: ESD [Static] Transients
We also provide EMI Filter solutions ranging from standard Off -The-Shelf to modified or fully custom for the following DO-160G sections;
- Section 18: Audio Frequency Conduced Susceptibility
- Section 19: Induced Signal Susceptibility
- Section 20: Radio Frequency Susceptibility
- Section 21: Emission of Radio Frequency
If you are looking for assistance, guidance, or solutions for any of the DO-160G requirements listed above…NexTek has the experience, expertise, and product range to help you find the perfect solution.
Trust the Experts, NexTek has 30 Years of experience designing and providing Transient and EMI protection solutions for customers and applications around the world.
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?
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!
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.
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 multistage “Fine 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!
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!
FPL Series – Product Family Page
GPS/Timing – Technology Page
FPLNFNFBP05 – Example FPL Series Product
GPS Application Spotlight – Blog Post
This post is about protecting against high speed HEMP/NEMP pulses, one of the many types of transient threat that NexTek arrestors provide protection against. Although Lightning energy is the primary source of damage to coaxial lines and systems where they are used, there are also other types of Surge Energy that can cause damage to electronics.
HEMP/NEMP, or High altitude Electro Magnetic Pulse/Nuclear Electro Magnetic Pulse, discharges are among the most rare types of coaxial transient threats…but also among the most potentially damaging!
Damaging Nature of HEMP/NEMP Threats – The high-speed and extremely high energy nature of HEMP/NEMP transient events means that most modern electronics are left vulnerable to damage or permanent failure. The total energy contained within a nanoseconds long pulse has hundreds of kV or potential and multiple kA of current.
Difficulties in Providing HEMP/NEMP Protection – Providing protection against high-speed transient energy pulses such as those caused by HEMP/NEMP events can be extremely challenging for coaxial RF applications for one important reason; some of the Transient Energy can actually be within the normal pass-band of the radio/system during normal operation. This type of conflict makes it difficult to provide optimal (minimal loss) performance during normal system and radio usage but also maintain adequate high-speed Transient response to provide protection against this type of high-speed threat.
To learn more, discuss your requirements, or receive feedback regarding protection options for your application…Please Contact Us!
How to Determine Protection Level Requirements and Identify the Correct Solution – When examining a specific application and to quantify the EMP threat level so as to inform the selection of appropriate protection, there are two main paths to travel down:
One, the EMP threat may be given by a specific Industry Standard document (MIL-STD, IEC, IEEE, EN, etc) according to a judgement made upstream in the overall program… Second, in the absence of a specific requirement…you can determine an approximate threat level or desired protection level based on the program-level requirements, estimated risk, and even things like the estimated cost of protection.
See below for a table which lists some EMP Requirements which may apply to a given application:
- MIL-STD 188-125-1
- MIL-STD 188-125-2
- MIL-STD 461, multiple subsections
- MIL-STD 464, multiple subsections
- IEC-61000-x-x, multiple subsections
- Or any others that deal with E1, E2, and E3 Pulse Types
- Also Related – IEMI Standards
Have you ever wondered if it was possible to install lightning and surge protection within or nearby to a Hazardous Environment? If so, what sort of factors are important to be aware of during
system design and maintenance? Are you familiar with NEC, NFPA, or ANSI Explosive Atmosphere Ratings but unsure about how to apply them to surge protection?
The white paper begins with a basic review of Hazardous Environment ratings and classes, as different Hazardous Area ratings could require different technical solutions between them. Beyond explaining the basics of the existing rating system, this article covers how to make a judgment about whether an arrestor can be installed safely in a given location (while maintaining Hazardous Environment requirements compliance.)
Last but not least, there is a checklist of Factors to consider when reviewing a specific application and potential install location within a system. Use these guidelines to carry your own analysis as far as possible, in order to make the proper design and component selection choices.
If you have any questions, comments, or concerns about Lightning Protection in Hazardous Environments then please get in touch with us directly!
Technical Support Contact
As electronics equipment and power systems become more and more complex, dealing with EMI/RFI issues becomes more and more important. For high current (high overall system power) power systems on mobile vehicles such as those being developed for new military vehicle designs, compliance with EMI requirements is just as critical as getting the system to operate normally on its own.
For example, new land-mobile vehicles are being introduced all the time…and their power and electronic systems are growing ever more complex. When this increased baseline complexity is combined with a need for maximum efficiency, more reliable operation, and potentially difficult environmental requirements (shock, vibration, temperature, etc.) the result is a potential design nightmare! The engineering challenges are sure to be many, with Electro-Magnetic Compatibility being one of many critical performance factors.
Even with this difficult intersection of requirements, NexTek’s HPR series of high current EMI/RFI filters are perfectly suited for this type of application for a wide variety of reasons. See below for a quick summary of the key features that make the HPR series perfect for rugged mobile power supply applications.
Rugged Construction – Extreme Shock, Vibration, Temperature Ratings
Extremely Compact Design – Maximum Space Savings, Available Bulkhead O-Ring
Filtering Performance – 60dB to 1GHz and beyond, to meet EMI/RFI Requirement Levels
NexTek’s range of filters are available with standard ratings such as:
50-400+ Amps RMS of Thru-Current
Cap Values up to 22µF+
DC Voltage Ratings from 100Vdc up to 1000Vdc
AC Voltage Ratings from 125Vac to 440Vac
Did you know that NexTek parts are currently used with the Power Systems of military vehicles all over the world to help ensure compliance with RFI/EMI requirements and continued trouble-free operation in “noisy” environments? Now you do!