CUI Inc. – Level VI-Compliant AC-DC Power Supplies Suitable for Global Use

CUI Inc has announced a family of Level VI-compliant external AC-DC power supplies which feature interchangeable AC input blades for use in mains outlets worldwide.

The wall plug-in SMI5-USB, SMI6, SMI18, SMI24 and SMI36 include AC blade options for North America, Europe, the UK, Australia and China, and support loads ranging between 5W and 36W. The power supplies all meet the stringent requirements of the US Department of Energy’s new Level VI standards, which are intended to lower the amount of power consumed when the end application is not in use or is no longer connected to the system.

Any manufacturer wishing to market an end product with an external adapter in the US must conform to these new performance standards by February 10, 2016.

The 5W, 6W, 18W, 24W and 36W multi-blade adapters feature a wide universal input-voltage range of 90V to 264V AC and are available in single output voltages from 5V to 48V DC. All models meet the Level VI standard’s no-load power consumption limit of <0.1W.

The SMI5-USB comes with an integrated USB connector and offers UL/cUL, GS and RCM safety approvals, while the SMI6 series also includes CCC and PSE safety approvals. The SMI18 and SMI24 series both offer UL/cUL, GS and PSE safety approvals, while the SMI36 series also has a CCC safety approval. All models conform to the FCC Part 15 Class B standards for EMI/EMC, and bear the CE mark.


  • ±5% load regulation
  • 100MΩ isolation resistance at 500V DC
  • Operating temperature range: 0°C to +40°C
  • Over-voltage protection
  • Overcurrent protection
  • Short-circuit protection


  • Consumer products
  • Industrial equipment
  • Mobile devices