16A TEMPEST power line fi lter manufactured by MPE
for the Royal Navy

Astute Class submarine

The new Royal Navy Type 26 frigate

In response to recent market trends and direct enquiries, MPE
has now developed a range of TEMPEST protection filters
specifically for installation within naval applications. This follows
on from the “floating earth”, ultra-low-leakage power line filter
range developed by MPE during 2017, as reported in Company
Bulletin Issue 12.
The new range of ground-breaking filters comprises highperformance
two-, three- and four-wire variants with low line-toearth
current leakage. The filters support system and equipment
compliance with the overarching requirements of NATO
TEMPEST SDIP-27 and SDIP-29 Standards and provide high
levels of attenuation across the full frequency spectrum. They
meet the line capacitance limitations of DEF-STAN 59-411 and
MIL-STD-461 and are designed to be compatible with a ship’s
integral DC leakage detection systems.
The new filters have been developed for any naval application
where TEMPEST protection is a requirement, typically briefing
rooms, radio rooms, electronic warfare hubs, and navigation or
command-and-control locations.
Indeed, MPE has many years of accumulated expertise and
experience in manufacturing low-leakage filters, for use in
applications such as secure communications systems, computer
installations, portable screened enclosures and mobile tactical
The new range of TEMPEST protection filters includes models
from 16A through to 125A, providing high levels of attenuation
from 100kHz right up to 10GHz – and with exceptionally low lineto-
chassis leakage properties from 16.6mA down to 3.6mA.
Mechanically these filters utilise stainless steel enclosures for
enhanced corrosion resistance in marine environments, and are
finished with high-quality epoxy paint. They have a very high
resistance to shock and vibration, and are designed to have an
extremely long service life.
Incorporating the same field-proven, ultra-high-reliability
components as have been used for decades in MPE’s other
power line filter ranges, these ultra-low-leakage filters have
already been designed into the highest profile marine platforms
such as the Royal Navy’s Astute Class submarines and their new
Type 26 frigate as pictured here.
You can download your personal copy of the comprehensive, sixpage
datasheet on MPE’s new TEMPEST power line filters for
marine applications from here.