Welcome to EMI Filter Company, a division of Nordquist Dielectrics.

We manufacture bulkhead mounted low pass filters in threaded, solder-in, and press-in styles to the microwave communications industry. 

Our patented process allows us to provide the best lead times in the industry.

All EMI filters are made in the U.S.A.

Find Your Filter with one of the following options:

In stock

View current, ready to ship filters.

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Use our Product Finder to search our products and request a quote.

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Custom

Need a custom filter? We deliver on time and on budget.