CUI INC – Ultra-Compact Open Frame AC/DC Power Supplies are Ideal for Space-Constrained Applications


CUI’s family of ultra-compact AC/DC power supplies is available in an open frame SIP package. The 3W and 5W configurations of the PBO series measure as small as 35 x 11 x 18mm (1.38 x 0.43 x 0.71in), allowing them to occupy less board real-estate than other power solutions. The 3W models are also available in low-profile, right-angle versions measuring as small 35 x 18 x 11mm (1.38 x 0.71 x 0.43in), making them ideal for applications where vertical board space is at a premium.

Available with typical efficiencies up to 79%, the high density PBO series offers a wide input voltage range of 85VAC to 264VAC or 70VDC to 400VDC for high voltage DC/DC systems. Single output voltages of 3.3, 5, 9, 12, 15 and 24VDC are available depending upon the series. For use in challenging environments, the 3W models offer a wide operating temperature range of -40°C to +85°C while the 5W models provide a range from -25°C to +85°C. Additionally, all models are designed to provide 3,000VAC input to output isolation.

The PBO series also meets UL60950-1/EN 60950-1 standards, complies with EN55022 Class B limits for conducted and radiated emissions and includes overcurrent and short circuit protections. The ultra-compact models are ideally suited for a variety of applications including industrial systems, automation equipment, security, telecommunications and smart home devices.


  • Ultra-compact package
  • High density
  • Wide operating temperature range


  • Industrial systems
  • Automation
  • Security
  • Telecommunications
  • Smart home