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This is the continuation of the "floating" ultra-low leakage power line filter series developed by MPE in 2017. The TEMPEST filter-often regarded as the acronym for "Transient Electromagnetic Pulse Emission Standard"-is a countermeasure designed to prevent eavesdropping from data that is radiated by wires (such as power, telephone, or control line cables) as a signal. These accidental electromagnetic radiations can be intercepted by hostile intelligence agencies operating outside the boundaries of walls, cabins, buildings, or rooms, and reconstructed into understandable data by them. Therefore, the new naval filter series includes high-performance two-wire, three-wire and four-wire variants with low line-to-ground current leakage. These filters support systems and equipment that meet the overall requirements of NATO TEMPEST SDIP-27 and SDIP-29 standards, and provide a high level of attenuation across the entire spectrum. They meet the line capacitance limits of DEF-STAN 59-411 and MIL-STD-461 and are designed to be compatible with the ship's overall DC leakage detection system. The new filter is developed for any naval application that requires TEMPEST protection, usually briefing rooms, radio rooms, electronic warfare centers, and navigation or command and control locations. In fact, MPE has years of accumulated expertise and experience in manufacturing low-leakage filters, which can be used in applications such as secure communication systems, computer installations, portable shielded enclosures, and mobile tactical shelters. The new TEMPEST protection filter series includes models from 16A to 125A, offering high attenuation levels from 100kHz to 10GHz, and extremely low line-to-chassis leakage characteristics from 16.6mA to 3.6mA. On the mechanical side, these filters use a stainless steel housing to enhance corrosion resistance in the marine environment and are coated with high-quality epoxy paint. They have very high shock and vibration resistance, and have an extremely long service life. These ultra-low leakage filters use the same field-proven ultra-high reliability components used in MPE's other power line filter series for decades, and have been designed into the most advanced offshore platforms, such as the Royal Navy's Astute Class submarine and its new type 26 frigate.

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