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55 Amperes - Standard Version  
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50 Amperes - Standard Version  
100 Amperes - Standard Version  
175 Amperes - Standard Version  
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140 Amperes Extreme Edition  
400 Amperes Extreme Edition  
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175 Amperes Extreme Edition  
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  High Current Filtering Technology - The HPR Series  
  This HPR series of extremely high current filters is ruggedly designed to operate at current levels up to 400 amperes and voltages up to 500 Vdc. A large range of available capacitance provides significant insertion loss at frequencies as low as 1 KHz, and provides over 60 db insertion loss to above 1 GHz. The unique ability to remove high frequency noise from very high current lines makes our patented HPR a proven and economical solution to your high current filter application.  
  High Performance Technology  
  EMI filters use two basic elements: series impedances, usually inductors, and shunt impedances, usually capacitors. These capacitors and inductors, configured as a low pass filter, reduce unwanted electrical energy entering or leaving a circuit. The capacitor's impedance is severely affected by lead inductance. Leaded capacitors are ineffective filters above the self resonant frequency, usually greater than a few megahertz, due to parasitic lead inductance. To achieve high frequency filtering, lead length must be very near zero.
HPR High Current Filters

The preeminent filtering challenge is to maintain the required capacitive shunting performance at high frequencies. It is difficult to attach capacitors to high current lines while maintaining the required minimum lead length.


The HPR high current filter capacitor from NexTek provides a unique solution to designers faced with these high frequency filtering needs on high current lines, especially noise from 1 MHz to over 1 GHz, for currents up to 400 Amperes. Unwanted RF Interference is filtered to improve power and/or signal quality.

NexTek's feedthrough designs are revolutionary, with their combination of an ultra compact design with their incredible toughness. There are no filters as compact and rugged as our HPR line of filter capacitors.

Insertion Loss
  Click here for the HPR High Current Filtering Brochure (.PDF)  
  Click here to go to the HPR Selection Guide page  
  Learn more about specific models within NexTek's HPR Model Range by using the direct links on the left side of the page.  
  For more info on Feedthrough Filtering, explore our Resources Section!  


Nextek is the manufacturer of all the products listed in these pages. We are not a reseller or distributor.

Nextek Engineering designs only the highest quality devices: Poorly designed and manufactured devices can greatly reduce RF signal quality, be susceptible to weather elements, and fail to protect over time.

Be smart, don't settle for cheap protection of your valuable equipment.

Lightning protectors are also known as lightning arrestors, lightning suppressors, surge protectors, surge arrestors, and surge suppressors.

High Current Filters are also known as feedthrough filters, EMI filters, RFI filters, power filters, and low-pass filters.


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