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EMI filter
Differential and common-mode filtering.
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Rectification
Full-wave rectified to 270 VDC.
High density power electronics
High-density power modules for rugged platforms
Compact conversion from three-phase 400 Hz AC to a regulated 28 V rail, with two modules designed to work together.
What the modules do
Each function belongs to the module that publishes it.
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Three-phase AC input
Accepts three-phase 400 Hz power.
200 VAC L-L, 400 Hz
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Rectified DC output
Full-wave rectifies and filters the input.
270 VDC, max. 830 W
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EMI filtering
Differential and common-mode filtering.
MIL-STD-461C CE03, 461D-E CE102
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Isolated DC-DC
Converts the high-voltage bus to 28 V.
200–400 V in, 28 VDC out
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Power density
A 330 W output in a ¾ brick.
79 W/in³
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Control functions
Remote on/off, trim and current sharing.
±10% trim
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Isolation
Fully isolated module.
4500 VDC
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Wide temperature range
Cooled through the baseplate.
From –55 °C to +125 °C (VRF), +95 °C (VDC)
How the power chain works
From three-phase AC to a regulated 28 V rail.
200 VAC
Three-phase AC
200 VAC L-L at 400 Hz enters the VRF module.
270 VDC
High-voltage bus
270 V nominal feeds the VDC converter.
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Isolated conversion
Fixed-frequency operation at 300 kHz.
28 VDC
28 V rail
28 VDC output, up to 11.7 A (A1) or 14.3 A (A2).
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Complete chain
The VRF module is designed to interface with VDC series converters, so the two pair directly.
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DC bus only
On a platform that already has a high-voltage DC bus, the VDC converter can work alone across 200–400 V.
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Custom models
Every datasheet offers custom models. For a different rating or a complete power system, talk to our engineers.
Where the modules fit
Application areas named in the datasheets, for rugged and thermally challenged platforms.
Military systems and avionics
Power from a 400 Hz AC source in a tight envelope.
3Ø 400 Hz AC · 270 VDC · 28 VDC
Defense systems
Rugged, conduction-cooled power for military platforms.
3Ø 400 Hz AC · 270 VDC · 28 VDC
Railway systems
A ruggedized converter cooled through its baseplate.
High-voltage DC input · 28 VDC
Telecom and base stations
Dense conversion for distributed power architectures.
High-voltage DC input · 28 VDC
Industrial control
Isolated 28 V from a high-voltage DC bus.
High-voltage DC input · 28 VDC
The power modules
Two pairs of building blocks for a compact power chain. Download the datasheets, or ask us for ordering details.
VRF-MIL-01-A
Military high-density rectifier filter.
- 3Ø 200 VAC L-L 400 Hz in, 270 VDC out
- Max. 830 W output
- –55 °C to +125 °C, conduction cooling
VDC-MIL-28-A1
Military high-density ¾ brick DC-DC converter.
- 200–400 V in (270 V nominal), 28 VDC out
- 330 W isolated output, 79 W/in³
- –55 °C to +95 °C operating temperature
New
VRF-MIL-02-A
Military high-density rectifier filter in an isolated, aluminium-shielded case.
- 3Ø 200 VAC L-L 400 Hz in, 270 VDC out
- Max. 830 W output
- –55 °C to +125 °C, MIL-S-901C shock
New
VDC-MIL-28-A2
Military high-density ¾ brick DC-DC converter, 400 W.
- 200–400 V in (270 V nominal), 28 VDC out
- 400 W isolated output, up to 14.3 A
- –55 °C to +95 °C operating temperature
Why these modules?
What the datasheets publish, with the conditions.
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A matched pair
The VRF filter is designed to interface with VDC series converters.
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No aluminum electrolytics
Neither module uses aluminum electrolytic capacitors.
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Thermal design
VDC: insulated metal substrate and thermally conductive potting.
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Military standards
VRF: compatible with MIL-STD-704A-F and MIL-STD-810C.
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Few external parts
VRF: no external components required.
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Designed and built in-house
Electrical design, thermal paths and production under one roof.
The datasheets state compatibility with these standards, which is not a certification. Specifications are subject to change; confirm them against the current datasheet.
Need a rectifier, a 28 V brick or a full power chain?
Tell us your input, output and envelope. We will help you choose a module or engineer a custom one.
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