VPX 371 - High Power - VITA 62 VPX Power Supply

WIENER VPX power supplies are commercial off-the-shelf (COTS), conduction cooled single stage converters according to the ANSI/VITA 62.0 specification. They can be used to power a VPX chassis and will fit into the standard envelope defined by VITA 48.0 specifications.

Using state of the art switching power technology a wide input range voltage range as well as high overall efficiency is achieved. The VPX715 series offers highest output power on all 6 DC output channels which makes it a perfect power supply for test and development applications.
The VPX power supply mechanical dimensions are 3U x 4HP (0.80” slot). It is outfitted with connectors, keying and alignment mechanism as per VITA 62.

Main Features

  • Compliant to VITA 62 baseline specification
  • Up to 715 W maximum / 600W continuous power,
  • 3U size, 0.8" pitch
  • 6 (5 independent) output voltages VS1 (12V), VS2 (3.3V), VS3 (5V), Vaux1(+12V), Vaux2(-12V), Vaux3 (3.3V)
  • up to 88% peak efficiency
  • 28V DC input voltage (19V ... 35V)

VPX371 Power Supply Features   

  • Compliant to VITA 62 baseline specification (mechanical specification, connector and keying, power rails)
  • Up to 715 W maximum / 600W continuous power
  • Parallel mode with Hartmann Electronic Power-Backplanes possible
  • Up to 88% peak efficiency
  • 6 (5 independent) output voltages
  • 28V DC input voltage (19V ... 35V)
  • Voltage sense controlled, Over Voltage, Over Current, Over Temperature protection
  • Ruggedized to MIL-STD-810
  • Operating Temperature -40°C to 85°C
  • Dimensions: 100.0 mm x 170.0 mm x 20.3 mm    (3.9” x 6.69” x 0.8”)
  • Weight: 0.6kg (1.23 lbs)
Item Description
VPX371D 715W VPX VITA62 power supply


715W VITA62 VPX Power Supply

High density, conduction cooled power supply according to VITA62 base specification.

Power supply


VS1 [+12V]

VS2 [+3.3V]

VS3 [+5V]

Vaux1 [+12V]

Vaux2 [-12V]

Vaux3 [+3.3V]


28 V DC

21 A

 50 A*

40 A

4.2 A

4.2 A

7 A**

* -> may be limited by connector or power backplane rating, 
** -> depending on temperature, estimated 5A at 85C, 3.3V aux is taken from VS2 and protected with fuse, 3.3Vaux is not a seperate power circuit

Technical Details


Form Factor 3U VPX
Pitch 4HP / 0.8"


0.6 kg / 1.23 Lbs / 21.2 oz.

Operating Temperature

-40°C to 85°C

Storage Temperature

-55°C to 105°C

Input to Output Insulation


Input to Output Isolation with Case


 Input to Case Ground Isolation


 Output to Case Ground Isolation


Case Ground to Safety Ground Resistance

< 10 mOhms

Maximum Output Power 715W
Maximum Input Power ~760W
Maximum Dissipated Power @ max. Power ~45W
Minimum Turn ON Voltage >20V
Minimum Turn OFF Voltage 19V Hysteresis
Maximum Continuous Input Voltage 35V
Maximum Short Time Input Voltage (15s) 36 V
Maximum Currents 12V / 3V3 / 5V 21 A / 50 A / 40 A
Fixed Switching Frequencies 12V / 3V3 / 5V 120 kHz / 125 kHz / 130 kHz
Peak Efficiencies 12V / 3V3 / 5V converters 94% / 92% / 92%
Max. Output Ripple and Noise: 12V / 3V3 / 5V 15 mVrms / 4 mVrms / 4 mVrms
(0-20 MHz Bandwidth) 65 mVpp / 27 mVrms / 27 mVpp
Line Regulation: 12V / 3V3 / 5V 40 mV / 2 mV / 4 mV
Vin=Vin,min to Vin,max, Io and Tc fixed 0.1%
Load Regulation: 12V / 3V3 / 5V 70 mV / 2 mV / 4 mV
  Vin=Vin,nom, Io=Io,min to Io,max, Tc fixed < 0.1%
Over voltage Protection: 14.4 V / 4.1 V / 6.1 V (hardware)
Temperature Protection Sensing Point (identical to case) 85°C (Latching)
Maximum Internal Working Temperatures 125°C


Protection / Control Logic / Timing  
Protection OVC, OVT, OFLW
Control Logic only ENABLE/INHIBIT, FAIL, no other utility or power supply specific signals

Minimum input voltage start up rise time

> 50 V/s
MIL Standard Compliance as per VITA 62 specification
MIL-STD-461F (EMI) Compliance Compliance has to be achieved with external filter
MIL-STD-704F Compliance Compliance has to be achieved with external filter. External hold-up circuit optional.
MIL-STD-1275D Compliance Compliance has to be achieved with external filter.


Compatibility / Environmental  
Compatibility VDE 0805, IEC 950
Tested and passed

-    Altitude: MIL-STD-810F, Methode 500.4, Procedure II

-    Vibration: MIL-STD-810G, Methode 514.6 D-1, Category 12

-    Shock: MIL-STD 810G, 40g, 11ms semisinusoidal


Product Data Sheet  
VPX 371 - High Power - VITA 62 VPX Power Supply: Print Product Data Sheet


Manual/Tech-Notes : VPX371 manual
Introduction: WIENER_Power Supplies_intro


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