Filter module covers transatlantic military specs

VPT has a new combination EMI filter and transient suppression module that meets stringent military standards for the world's largest defence markets - the USA and Europe.

VPT has a new combination EMI filter and transient suppression module that meets stringent military standards for the world's largest defence markets - the USA and Europe.

Designed for military uses including ground-based equipment, weapons systems, armoured vehicles, and field radio systems, the new DVMN Series of EMI filters is classified as "commercial-off-the-shelf" (COTS) and available from stock immediately.

"Our market was asking for a combination filter/transient suppression module, compatible to multiple military standards around the world, that can handle today's higher output power and large voltage spikes typical in military applications", explained Dr Glenn Skutt, Vice President, New Technology of VPT.

"We listened, and we delivered a module that not only met these criteria, but are also able to provide it at an affordable COTS price".

Worldwide, the majority of off-the-shelf filter modules are built to US Department of Defense standards such as MIL-STD461 for EMI and MIL-STD1275A or 704A for input voltage.

However in the large defence markets in the UK and other parts of Europe, applications require conformance to the UK Ministry of Defence DEF STAN series of specifications including DEF STAN59-41 (EMI) and DEF STAN61-5 (input voltage).

To satisfy these specifications, typical solutions would include the MIL-STD component plus considerable additional components for further filtering and surge suppression.

The DVMN EMI filter module from VPT eliminates the need for these extra components by complying with US and UK standards, enabling the development of smaller, more efficient power systems as a result.

In addition to the reduction in size, reduced component count and interconnection eases testing and the inherent reliability of the DVMN solution compared to other approaches.

XP-Military, VPT's partner for providing power system solutions in the UK, France, and other European markets, considers the breakthrough new EMI filter an essential component for power supply systems they design.

"VPT's DVMN Series allows XP to offer its customers a more cost effective, higher performance power solution occupying typically less than 50% of the space volume than previously available.

This enables our customers to sell the same design worldwide without the time and hassle of redesign", said Martin Brabham Industry Manager: Avionics and Defence for XP.

Essentially two products in one, the DVMN Series effectively provides EMI filtering plus protection against the high-voltage spikes that can occur in military applications.

With the DVMN Series, system designers can reduce the size and expense of power system designs by incorporating a single, small, high density DVMN module instead of the multiple modules previously necessary to perform these functions.

The innovative design of the DVMN provides a power density unmatched in the market.

Providing 10A of current in a standard quarter brick package, the DVMN Series is the smallest size, highest density standard transient suppression module in its class.

The DVMN can handle output power of up to 200W from a single module, eliminating the need to configure multiple modules to share the load and enabling smaller overall power subsystems.

The DVMN Series is compatible with VPT's DV200 COTS-grade DC/DC convertor, which provides up to 200W of output power.

Features of the new DVMN Series include: 28V input; 60dB minimum attenuation at 500kHz; soft start feature to ensure smooth startup; approximately 99% efficiency; undervoltage lockout circuitry for safe operation; output inhibit to shutdown downstream converters in case of a prolonged input overvoltage; output voltage clamp to 58 volts maximum; standard quarter-brick size; 10A maximum output current; meets MIL-STD-704A, B, C, and D surge limits; meets MIL-STD-461C CE03 and MIL-STD-461D CE102 and DEF STAN 59-41 and 61-5 EMC requirements; protects against conducted susceptibility specified in MIL-STD-461C, CS01 and CS02 and against voltage spikes specified in MIL-STD-461C CS06; fully potted, rugged case; and military temperature range of -55 to +100C.

The DVMN undergoes rigorous environmental qualification testing for conditions including extreme temperature cycling, vibration, shock, salt atmosphere, barometric conditions and moisture and solvent resistance.

VPT offers additional environmental screening options.

VPT can also customise the DVMN Series for specific applications through its engineering services group.

Starting at just $243.28 in quantities of 100, the DVMN Series is also the most affordably priced module in its price and power range.

DVMN modules are available immediately from stock.

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