M251 Series
  • AC/DC Converter
  • Single Output Up To 2000W
  • Input range: 150-330VAC / 400Hz / 3-Phase
  • Can be Paralleled for More Power
  • EMI Filters Included
  • Miniature, High Density
  • Operating Temperature: –55°C to +85°C
  • Efficiency 90% (Typical)
  • Designed to Meet: MIL-STD-461, MIL-STD-704, MIL-STD-810
Standard - Select from the following list of common model configurations and request a quote.
ModelInput Voltage RangeOut#1Power Factor Correction
M251-100103-127VAC / 400Hz / 3-Phase270V @ 7ANo
Additional Configurations *
Designed to Spec **
* Additional Configurations - We can calibrate or customize any aspect of this device to your requirements, typically without NRE. Please contact us to learn more about avilable options.
** Designed to Spec - Challenge us with your requirements. No matter how complex, we will design and deliver the exact power conversion solution for your needs.

About the M251 Series

The M251 Series AC/DC converters feature a miniature, high density, high power factor design, one output, 3-phase input and delivers up to 2000W. Built to exacting standards, an efficiency of 90% (typical) and operating temperature of -55°C to +85°C is achieved. As a standard feature, EMI/RFI filters are included. Designed to meet: MIL-STD-461, MIL-STD-704 and MIL-STD-810 this is the ideal unit for military, rugged, telecom and demanding industrial applications. 

(All specifications are factory configurable by a design engineer.)

Model Input Power (WxDxH) Weight
M251 85 to 265VAC  Up to 2000W  5.45" x 6.45" x 1.45"  4.4 lb 
Per Output Voltage Max Current    
Output #1 150 to 330VDC 7A     


All of our products can be configured to your specific requirements. Customers are invited to work with a design engineer to define the output, input range, protection limits and dimensions of the power solution which best meets their project needs. This can frequently be accomplished without NRE. Use the contact form to submit a request, or contact us at (603) 267-8865 to discuss your requirements. Configurations created for specific requirements will be assigned a new variant part number.

Milpower Source
P.O. Box 810
7 Field Lane
Belmont, NH 03220
United States
Phone: (603) 267-8865
Fax: (603) 267-7258
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