CUI INC – High-density AC-DC power supplies housed in low-profile open-frame packages


Featuring high power densities up to 30W/in3, the VOF series of AC-DC power supplies from CUI’s Power Group offers efficiency up to 94% and supports loads of up to 550W continuous power.

The VOF-180 series, rated for 180W, has an open-frame package with an industry-standard 2” x 4” footprint and is 0.75” high. The 2” x 4” VOF-225A with a 225W rating is 1” high.

The 275W, 300W, 350W and 550W models, the VOF-275, VOF-300, VOF-350 and VOF- 550 series, are housed in 3” x 5” packages. The VOF-275 is 0.75” high, the VOF-300 1.18”, the VOF-350 1”, and the VOF-550 is 1.5” high.

The power supplies support efficient operation in stand-by mode, consuming no- load power as low as 0.5W.

Output-voltage options range from 12V to 58V DC. The power supplies handle a universal input-voltage range of 80V to 264V AC.

Certified compliant with the UL/EN60950-1 safety standards, the VOF series parts also satisfy the requirements of the EN55032 B specifications for conducted and radiated emissions.


  • Power factor correction
  • 12V DC/500mA fan output
  • Over-voltage protection
  • Over-current protection
  • Short-circuit protection
  • 3.37 million hours MTBF calculated in accordance with Telcordia SR-332 issue 3
  • Operating-temperature range: -40°C to 50°C at full load with forced-air cooling


  • Industrial systems
  • Telecoms equipment
  • IT equipment
  • Consumer electronics