CUI – VOF Series: AC-DC Power Supplies Offer Improved No-Load Performance

CUI has expanded its VOF series of compact, open-frame AC-DC power supplies with new 100W, 120W and 150W models.

This second generation of open-frame power supplies provides a number of improvements over the company’s previous offerings, including higher efficiency, improved no-load performance and a boost in power.

The power supplies can accommodate a wide universal input voltage of 90 to 277V AC from a 47Hz to 63Hz supply, offering compatibility with mains power worldwide.

The new VOF power supplies are available with a choice of output voltages: 5V, 12V, 15V, 24V, 36V and 48V. All models include output voltage adjustability of ±5%, set by use of an on-board potentiometer.

The VOF-100 is rated for operation at 100% load and across a temperature range of -20°C to +50°C with 6.7 cubic feet/minute of forced-air cooling. This load must be de-rated by 50% for operation at +60°C. The VOF-120 and VOF-150 models operate with convection cooling at 100% load from -20°C to +40°C, also de-rating the load by 50% load at +60°C.

Operating at up to 90% efficiency, the new VOF series features no-load power consumption as low as 0.25W. The VOF-150 model is equipped with active power factor correction.

All models are packaged in industry standard footprints. The VOF-100 measures 4” x 2” x 1.32”, while the VOF-120 and VOF-150 models measure 5” x 3” x 1.32”.


  • UL/cUL and TUV 60950-1 safety certifications
  • Qualified for CE mark
  • Conformance to EN 55022 Class B and FCC Class B EMI standards
  • Over-voltage, overcurrent and short circuit protection
  • 3,000V AC primary to secondary isolation

  • Computing equipment
  • Industrial equipment
  • Consumer electronics