400-Watt DC/DC Converter, 3U VPX

400-Watt DC/DC Converter, 3U VPX

Model DC/DC VPX55-3

400-Watt DC/DC Converter, 3U VPX

NAI’s VPX55-3 is 400-Watt DC/DC Converter that plugs directly into a standard 3U VPX chassis with a VITA 62 0.8” power supply slot. This off-the-shelf solution for VITA 46.0 and VITA 65 systems is compatible with VPX specifications; supports all VITA standard I/O, signals, and features; and conforms to the VITA 62 mechanical and electrical requirements for modular power supplies.

The VPX55-3 switching power supply is conduction-cooled through the card edge/wedgelock. It accepts +28 VDC input voltage and provides six outputs at up to 400 Watts.

The VPX55-3 can be used either as a single-stage module or a back-end module in a multiple power supply configuration. It supports a variety of standard features, including continuous Background Built-in-Test (BIT); remote error sensing; and protection against transients, overvoltage, overcurrent, and short-circuits. With its intelligent design, the VPX55-3 also has the flexibility to address special needs. Optional current share available.

This COTS converter is specifically designed with NAVMAT component derating for rugged defense and industrial applications. It is also designed to meet the many harsh environmental requirements of military applications.


This product is Mature. For existing customers only; not recommended for new applications. Please refer to the VPX55H product page for details on the closest replacement product.


 VPX55H Power Supply

Power Supply Reference Guide


  • Ideal for rugged 3U VPX power applications
  • Standard VPX-compatible connectors and I/O 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
  • Accepts +28 VDC input (+16 VDC to +36 VDC Continuous)
  • Provides six outputs and I/O at up to 400 Watts 
  • Continuous Background Built-in-Test (BIT)
  • Current share (optional)
  • Input transient protection per MIL-STD-704F
  • Input transient protection w/reverse polarity protection per MIL-STD-1275B (optional for 300-Watt version only)
  • Integrated EMI filtering per MIL-STD-461F
  • Operates at full load through the entire -40° C to +85° C temperature range





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