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Tactical Universal AC to DC Power

The Espey Tactical Power Supply provides regulated 28VDC power from any AC power source in the range of 100-253VAC, 47-420 Hz. It is ideally suited for powering dismounted tactical vehicle systems in anywhere AC power is available. The sealed mechanical design provides protection for the electrical components against dust, water immersion and external environmental factors.

Electrical Specifications

  • Output Voltage: 28 VDC
  • Regulation: +/- 1%
  • Output Voltage Adjustment: 24-32 VDC
  • Voltage Ripple: 2% max (1A to full load)
  • Output Current: 25 Amps
  • Output Power: 700W
  • Efficiency: 85% typical
  • Input Voltage: 100-253 VAC single phase
  • Input Frequency: 47-420 Hz
  • Surge Immunity: +/- 2kV line-to-line and line-to-ground
  • Emergency DC Input: 28 VDC Nominal Battery

Safety/Performance Features

  • Current Limiting:30 Amps Automatic with AC and DC breakers
  • Isolation: Isolation input to output, input to chassis and output to chassis
  • Over voltage, over current and over temperature protection
  • Remote voltage sense compensates for up to 2V drop in cables
  • Output voltage and current digital meter display status and fault LEDs all Class B NVIS compatible
  • Automatic power changeover to emergency DC input when AC Input drops below 100VAC. Output
    becomes a pass though of DC emergency input voltage


  • MIL-STD-461-F, CE101, CE102, CS101, CS114, CS115, CS116, RE101, RE102, RS103 ground vehicle
  • MIL-STD-1275D input spike and surge protection
  • IEC 61000-4-2 ESC, IEC61000-4-5 Surge Immunity

Mechanical/Environmental Specifications

  • Size and Weight: 14.0 x 5.4 x 12.5 (in. W x H x L) 16.8 Lbs.
  • Degree of Encolsure:  Sealed enclosure MIL-STD-810 Method 512 Procedure I immersion
  • Operational Temperature: -40°c to +66°c
  • Storage Temperature:  -62°c to +71°c
  • Connectors: Circular mil type PT07C14 and M55181 series connectors
  • Vibration: MIL-STD-810, method 514, Procedure I, category 4 restrained cargo
  • Ballistic Shock:  MIL-STD-810, method 522, Procedure VI
  • Humidity: 0 to 100% Condensing MIL-STD-810 Method 507 Procedure 2
  • Altitude: 40,000 ft. operating
  • Coating: Lusterless Green 383 CARC iaw MIL-DTL-64159


  • Designed for minimum size and weight to obtain maximum reliability and performance
  • Rain proof, immersion proof, fully sealed enclosure
  • Natural convection cooling
  • Universal AC Input
  • Adjustable output voltage with remote sense capability
  • 28V backup battery input with seamless
  • changeover upon loss of AC power
  • MIL-STD-810 ground mobile environment
  • Class B NVIS compatible meters and indicators
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