DC Power Line Conditioners with Holdup Time

Model 3U VPX VPX55-3HU

VPX55-3HU 3U VPX Power Line Conditioner with Holdu

The VPX55-3HU is a 500-Watt DC/DC power Line Conditioner which plugs directly into a standard 3U VPX chassis with a VITA 62 0.8” or 1.0” power supply slot. This off-the-shelf solution is compatible with VPX specifications and addresses the need for 3U VPX power applications requiring an optional VITA 62 Energy Storage Module. The VPX55-3HU is a +28V (in) DC power line conditioner with holdup capability that protects downstream DC-DC converters from MIL-STD 704 transients, low-voltage conditions and power interruptions; providing up to 50 milliseconds of holdup time at 500 watts.  The VPX55-3HU is designed to meet standard 3U VPX (VITA62) mechanical requirements and is a perfect companion unit for all NAI VPX55 series +28VDC DC/DC converters. 

Power Supply Reference Guide


  • Addresses the need for 3U VPX power applications needing an optional VITA 62 Energy Storage Module
  • Standard VPX-compatible connector per VITA 62
  • Compatible with System Management Bus per VITA 46.11
  • Off-the-shelf solution for VITA 46.0 and VITA 65 systems
  • Supports all VITA standard I/O, signals, and features
  • Protects DC/DC Converters From MIL-STD 704A through F Transients
  • Designed to work with the NAI VPX55-3 family of DC-DC Converters
  • Wedgelock, Plug-in Design (conduction-cooled)
  • Reverse Polarity Protection
  • Holdup
  • Standby Output
  • BIT
Document DownloadsDate
VPX55-3HU Holdup Unit Specification
Stp File for VPX55-3HU
Power Conversion
VXI Power Conversion