VPX Power Supplies

NAI's Rugged Power Supplies are designed to meet VITA 62 requirements. Fully digital and discrete to provide robust communication and extensive customization. Designed, tested, and verified to run at full load across all temperatures for maximum efficiency.

Flexible. Interoperable. Reliable.


Fully digital. Fully flexible. Our power supplies provide robust communication through I2C/USB and our SoftPanel.


Discrete components fully designed in house keep you in control. Configure our power supplies to meet your needs.


Designed, tested, and verified by us. Extensive rugged testing data gives you confidence that our products live up to the toughest expectations.

Don't let unique or changing requirements slow you down

Our rugged VPX power supplies are built to provide unlimited possibilities in addition to our standard features. We rapidly adapt to custom requirements and size constraints. Accelerate your time-to-mission by building flexible, dependable, scalable systems customized to your needs with little to no NRE.

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NAI's VPX68 Power Supply

Extensive Customization

Wider input ranges, highly efficient layouts, and bespoke solutions tailored to your requirements.

Built-In Protection

Designed to intelligently detect and safeguard against input transients, overvoltage, overcurrent, and short circuits.

Continous Self Test

Built-In-Test runs continuously in the background and provides status reporting, consistently ensuring the integrity of your system.

Robust Communication

I2C and USB based communication with our SoftPanel makes it easy to understand and monitor signals and performance.


Field-proven to withstand a variety of temperatures, humidity, vibration, and shock to suit extreme applications. High-altitude options available.

Current Share

Supply more current or add redundancy to your system. Current sharing and monitoring allows you to connect our power supplies in parallel.

Standards Compliance

Input transient protection per MIL-STD-704F, integrated EMI filtering per MIL-STD-461, and environmental compliance per MIL-STD-810.
SOSA™-aligned options available.

Made in the USA

All products are 100% designed, manufactured, assembled, and tested in the United States.

Fighter jet in clouds

Take your platform to new heights

NAI's patented high-altitude option for VPX power supplies extends our product capabilities up to 70,000 feet without sacrificing flexibility. Available for 3U and 6U form factors with a maximum output of 1,400 watts.

Product Comparison

Product Connector Input Output Form Factor Thickness Efficiency # Outputs I2C High Altitude Integrated Holdup
VPX68 Per VITA 62 +28 VDC 400 W 3U 1.0" 92% 6 Yes No Yes, optional
VPX55H-3 Per VITA 62 +28 VDC 500 W 3U 0.8" 89% 6 Yes No No
VPX55HS Per VITA 62 +28 VDC 725 W 3U 1.0" 89% 6 Yes No No
VPX57-31 Per VITA 62 +270 VDC 500 W 3U 1.0" 87% 6 Yes Yes, optional No
VPX57HS Per VITA 62 +270 VDC 750 W 3U 1.0" 90% 6 Yes Yes, optional No
VPX56H-6 Per VITA 62 3Φ AC or +270 VDC 1000 W 6U 1.0" 88% 5 Yes No No
VPX56H2-6 Per VITA 62 3Φ AC or +270 VDC 1400 W 6U 1.0" 90% 5 Yes Yes, optional No
44KS6 Per VITA 62 +28 VDC 75 VA 3U 1.0" 70% 1 Yes No No

Rugged & Reliable

Count on us to take on your most challenging environments. We ensure all of our power supplies meet or exceed expectations using our extensive on-site testing capabilities, verified by third-party labs. All units are specified over their full operating temperature range at full-load conditions.

Temperature - Operating -40°C to 85°C at 100% load (temperature measured at card edge, conduction via card edge)
Temperature - Storage -55°C to 105°C (per VITA 47 CC4)
Humidity 95% at 71°C per MIL-STD-810G, Method 507.5 (non-condensing)
Vibration Per MIL_STD_810, Method 514, Proecdure 1; Per VITA 47, Class V3
Shock 30 g's each axis per MIL-STD-810G, Method 516.6, Procedure 1; Hammer shock per MIL-STD-901; 1/3 sine wave per VITA 47 OS2
Altitude 1,500 feet below sea level to 60,000 feet above sea level per VITA 47.
Up to 70,000 feet above sea level with high altitude option.
ESD 15 kV EN61000-4-2 per VITA 47
US Air Force flying helicopter

Pioneering Open Standards

NAI is proud to be a contributing member of the SOSA™ consortium and the VITA trade association. These organizations generate national and international standards to streamline the development of high reliability electronic hardware. We offer several configurable off-the-shelf SOSA™-aligned products that are field-proven in rugged defense, industrial, and commercial applications.