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New Power Line Filters Boast 40 GHz and HEMP Performance

Superior Performance Confirmed by Independent Test Laboratory

CEDAR PARK, Texas, July 11, 2011 – ETS-Lindgren announced a new series of multi-purpose radio frequency (RF) power line filters designed to meet point-of-entry requirements of MIL-STD-188-125-1 and -2 for defense and commercial applications. The new Model LRX-EMP filters not only provide protection against electromagnetic pulse (EMP) and high-altitude electromagnetic pulse (HEMP), but offer superior insertion loss performance of 100 dB from 14 kHz to 40 GHz – at full load. This provides better attenuation performance for electromagnetic interference (EMI), radio frequency interference (RFI), high intensity radiated fields (HIRF) and intentional electromagnetic interference (IEMI) requirements. The new filters are now available with ratings of 277/480 VAC from 30 to 400 amperes, as single or dual circuit individual filters. Multiple line filters are available in panels for three phase power requirements, with three or four filtered lines.

“ETS-Lindgren’s new power line filters offer proven 100 dB of attenuation from 14 kHz to 40 GHz in addition to providing EMP and HEMP protection. This is critical when a filter is used in a secure environment where protection against electromagnetic pulse is essential, not a ‘nice to have’ feature,” noted Sergio Longoria, Senior Filters Engineer for ETS-Lindgren. “While other filter manufacturers offer 80 dB of attenuation over a reduced range such as 10 MHz to 1 GHz, our customers demanded better performance. We worked hard to design a new, robust line of filters and confirmed actual performance at an independent test laboratory. We were very excited when we received the test report for these new filters,” he added. To review the test report summary, click here.

Customers may be assured the new Model LRX-EMP filters include the same high quality design features they have long come to expect from the company’s popular, commercial RF filters. These design features include use of a high frequency feed-through capacitor to provide better high frequency response as well as oversized inductors for low loss and low temperature rise, resulting in extended filter life. Filter life is further extended by using self-healing capacitors. In addition, suppression elements are used to protect the filter, as well as the connected equipment, by absorbing and diverting power to ground. For HEMP protection, Model LRX-EMP filters are fitted with high transient suppressors in front of an internal inductive input circuit. This feature results in very low residual currents during an HEMP pulse, providing further protection to the connected equipment.

All Model LRX-EMP filters feature excellent multi-stage performance and meet or exceed the requirements and safety criteria of MIL-STD-188-125-1 and -2, MIL-F-15733, MIL-STD-220C, UL 1283, IEC 60939, and LVD (2006/95/EC). Custom designs are available upon request. Standard warranty is two years.

For more information, view the Power Protection Filters brochure, contact Mr. Longoria at phone +1.512.531.6400, or send an email

About ETS-Lindgren

ETS-Lindgren is an international manufacturer of components and systems that measure, shield, and control electromagnetic and acoustic energy. The company's products are used for electromagnetic compatibility (EMC), microwave and wireless testing, electromagnetic field (EMF) measurement, radio frequency (RF) personal safety monitoring, magnetic resonance imaging (MRI), and control of acoustic environments.

Headquartered in Cedar Park, Texas, ETS-Lindgren has manufacturing facilities in North America, Europe and Asia. The company is a wholly owned subsidiary of ESCO Technologies, a leading supplier of engineered products for growing industrial and commercial markets. ESCO is a New York Stock Exchange listed company (symbol ESE) with headquarters in St. Louis, Missouri. Additional information about ETS-Lindgren is available at Additional information about ESCO and its subsidiaries is available at

Janet O'Neil
Marketing Communications

Tel +1.512.531.6400 Tel +358.2.8383.300 Tel +44(0)1438.730700 Tel + Tel +8610.8275.5086 Tel+ 81.3.3813.7100
Fax +1.512.531.6500 Fax +358.2.8651.233 Fax +44(0)1438.730751 Fax + Fax +8610.8275.5537 Fax +81.3.3813.8068

Information presented is subject to change as product enhancements are made. Contact ETS-Lindgren Sales Department for current specification.