Power Sources Unlimited is the authorized North American ISO 9001:2008 Registered distributor of AC/DC Power Supplies and DC/DC Converters from the world's leading manufacturers. Our strategic alliances allow us to support you:

  • Select the RIGHT PRODUCT for your application
  • Purchase at the LOWEST COST of ownership
  • Develop PRICING & INVENTORY PROGRAMS tailored to your distinct needs
  • Engineer MODIFIED STANDARD PRODUCTS for your specific requirement

Our website provides detailed specifications for all our products and allows you to purchase products on-line. Can't find what you're looking for? Call us at 800-966-PSUI (7784) or (508)384-1419 or email your request to info@psui.com.

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Level V / ErP II Compliance Directive Effective April 27, 2011

Are You Ready?
Power Sources Is!

Click here to view our selection of Level V / ErP II ITE Products
Click here for our selection of Level V / ErP II Medical ProductsMedical Safety Approvals

Discount on Prototype Orders

5% Discount on Prototype Orders Through June 30, 2012.
Click here for more details.


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Medical Power Solutions

Power Sources Unlimited has hundreds of AC/DC power supplies and DC/DC converters, all with EN60101-1 approvals for patient vicinity medical and dental applications. Click here to view our medically approved power conversion offerings.

Press Releases

  • Low Cost and Compact 60W Desktop Power Supply, Efficiency Level V… Read more
  • 200 Watt AC-DC Single Output 1U Low Profile Medical & ITE Power Supply… Read more
  • 260 Watt Convection Cooled AC-DC Single Output 1U Low Profile Power Supply… Read more
  • DPBF1U Series Front Access / Connect DC Breaker Distribution Panels… Read more
  • High Power Density DC-DC Converter Modules With Ultra-Wide 4:1 Input… Read more
  • 650 Watt AC-DC Single Output 1U Low Profile Power Supply… Read more
  • Power Sources Unlimited, Inc. has received the International Organization for Standardization ISO 9001:2008 certification… Read more
  • 30 Watt DC/DC Converter Module, Ultra wide 4:1 Input Range in a 1″ x 2″ x .04″ Package… Read more
More Press Releases

Technical Reference

See our Technical Reference Pages for technical notes, glossary of power conversion terms, industry requirements, organizations, useful equations, etc.

Warehouse Clearance

Overstocks on ac/dc power supplies and dc/dc converters offered at significant discounts! Hurry… limited quantities available! Take a look!

Product Offerings

Power News

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Product Showcase

Traco Power TEP 75-200

Buy the Traco Power TEP75-200 Series
  • Feature 2:1 or 4:1 Input Voltage Range
  • Industrial and Railway Applications
  • Options Include, Chassis Mount with Screw Terminal Block, Heat Sink, EMI Input Filter and DIN – Rail Mounting Kit
  • Very High Efficiency up to 91%
  • 3-Year Product Warranty
  • Starting under $103.00 to $301.00 in OEM quantities, depending upon wattage and options

Cincon CFM351M

Buy the IPD GRN SeriesMedical Certification
  • 350 Watt Single Output Medical Power Supply
  • Universal AC input with active PF
  • Meets EN60601-1 and EN 55011 Class B
  • 1U profile, High power density
  • Remote ON-OFF, +5V Stand-by Output and 12V fan output
  • 350W with free air convection @ 220VAC Input
  • Starting under $135.00 in OEM quantities

N2Power XL375

Buy the N2Power XL375 Series
  • 260W low profile convection cooled AC-DC power supply
  • Measures only 3.3″ x 5″ x 1.5″
  • Universal Active PFC, 90–264Vac input
  • Output Voltages of 12, 24, 28, 36, 40, 48, 54 and 56VDC
  • Up to 93% efficiency
  • Remote On-Off and active in rush current protection
  • Starting under $190.00 in OEM quantities

Protek Power PM202

Buy the Protek Power PM202 Series
  • 200 watts of continuous power with 5.3 CFM forced air cooling or 150 watts convection cooling
  • Measuring only 3″ x 5″ x 1.5″
  • Universal active PFC 90–264VAC input
  • Output voltages of 12,15,18,24,28,36,and 48VDC
  • EN55011 / 55022 and FCC Class B
  • Starting under $92.00 in OEM quantities