New Industry Products

CUI Adds Three New Series Of Single Output AC/DC Power Supplies

March 19, 2021 by Gary Elinoff

Supplying from 35 to 350 watts, the new lines are the latest additions to CUI’s large VGS family of chassis mounted devices.

Aimed at rugged industrial applications, the new units from CUI, a Bel group company, operate over temperature ranges of at least -30 to +70 °C. They also feature low no-load power consumption for reducing standby power consumption.

Image courtesy of CUI
Image courtesy of CUI


The Three New Series of Power Supplies from Bel are:

The VGS-C series. These inexpensive devices operate from power supplies ranging from 85 to 264 VAC. They feature output voltages of 5, 12, 15, 24, 36, or 48 VDC and offer power outputs ranging from 35 to 350 watts. 

The VGS-D series. Series members offer over temperature protection and power factor correction. They offer output power capabilities ranging from 75 to 320 watts along with DC output voltages chosen from 5, 12, 15, 24, or 48 volts. Input voltage range is 85 to 305 VAC.

The VGS-W series. These units sport output powers varying over 35 to 150 watts with voltage outputs of 5, 12, 15, 24, 36, or 48 VDC. Input voltage range is 85 to 305 VAC.



The units all feature a solid screw terminal interface. Conformal coating options and terminal covers are available.

All member of each of the three series feature

  • Single output voltages that are adjustable. 
  • Short circuit protection
  • Over current protection
  • Over voltage protection


The Huge Scope of the Offering

Each of the new series, VGS-C, VGS-D and VGS-W, do not introduce individual power supplies, but rather whole new lines of power supplies.

For example, left-clicking VGS-C series yields seven choices of sub-series. These range from the 35 watt VGS-35C sub-series to the 350 watt VGS-350C sub-series. On examining just the VGS-35C sub-series datasheet, for example, there are five power supplies listed

Similar results are seen for VGS-D and VGS-W, adding up to a large addition to CUI’s already quite sizable offerings of metal cased power supplies.  


Convection Cooling and Forced Air Cooling

Convection cooling is simply the cooling that is caused by the natural air flow about a unit such as a power supply. Forced air cooling is when a device, such as a fan, forces air flow over an area to be cooled.

Most of the many power supplies that are member of these three series are convection cooled. The 320 watt VGS-320D series and the aforementioned 350 watt VGS-350C series are the highest powered devices covered in CUI’s announcement. They are also the two lines of power supplies that employ forced air cooling. The fan is temperature controlled, enabling to respond as needed.


Physical Consideration

These units generally operate over a -30 to +70 °C temperature range, with a few outliers offering an extended  -25 to +70 °C operational span


Regulatory and Safety Consideration

All member of the three new series from Bel meet:

  • IEC/EN 61558
  • IEC/EN 60335
  • GB 4943 
  • 55032 Class B for radiated/conducted emissions
  • 62368-1 for safety
  • 61000-3-2 for harmonics 
  • 61000-4-3 for immunity



  • RoHS compliant
  • REACH compliant