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- CUI is an electronic components manufacturer with an unwavering commitment to design engineers. The company specializes in a diverse range of product technologies, including power, interconnect, audio, motion control, and thermal management.

Power Solutions Center

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As a leader in the power supply industry CUI offers a diverse range of leading solutions to meet your needs. Browse CUI’s main product offerings. Learn More

Power Product Selector

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The Power Product Selector allows you to browse CUI’s wide range of ac-dc power supplies and dc-dc converters from front-end power to digital point-of-load. Learn More

High Efficiency External Power Supplies

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Check out CUI’s comprehensive line of Level VI and CoC Tier 2 compliant external ac-dc adapters to keep you one step ahead of the latest regulations. Learn More

Product Listing View All

Featured Products

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DC Switching Regulators

Designed as a drop-in replacement for linear LM78XX and LM79XX regulators, the CUI V78 and P78 series utilize switching technology, creating a highly compact, highly efficient alternative solution. Learn More

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Open Frame AC-DC

CUI's next-generation VOF open frame AC-DC power supplies are designed to meet the growing need for "green" embedded power solutions, delivering higher efficiency and improved no-load performance. Learn More

Newest Products View All (88)

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SDI Series 30 W and 40 W Desktop Power Adapters

CUI's SDI series 30 W and 40 W desktop power adapters are available with output voltages of 12, 15, 19 and 24 VDC.

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Waterproof Micro USB 2.0 Connector

CUI’s UJ2W-MIBH-4-SMT is a micro B type jack connector with an Ingress Protection (IP) rating of IPX7, offering it protection from liquid and moisture in challenging applications.

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185 W to 280 W Open Frame AC-DC Power Supplies

CUI’s open-frame AC-DC power supplies are higher-power additions to CUI’s latest generation open frame AC-DC power portfolio.

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Low Power DC-DC Converters

CUI low power DC-DC converters are available with a range of package, input, output and isolation voltage options. Order today from Digi-Key.

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Rectangular Micro Speakers

CUI’s versatile line of rectangular micro speakers is the ideal solution for space-constrained designs.

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Ultra-Compact SIP AC-DC Power Supplies

CUI has expanded their open-frame AC-DC line with a family of ultra-compact modules in a SIP package.

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Product Training Modules View All (21)

power supply

Energy Efficiency Standards for External Power Supplies

Duration: 10 minutes

To explain the current and future regulatory environment for external ac-dc power adapters.

Encapsulated AC-DC Power Supply Series

Encapsulated AC-DC Power Supply Series

Duration: 5 minutes

Rugged and compact, and also features a wide temperature range, potted case. Fit for designs requiring 1-25 W of on-board AC-DC power conversion.

Good Thermal Management

Thermal Management of Power Supplies

Duration: 20 minutes

Considerations for thermal management in design and application.

AMT31 kit

AMT31 Series Commutation Encoder

Duration: 20 minutes

Describing the functional theory of commutation encoders. Along with understanding what makes AMT31 Series revolutionary.

Featured Videos View All (22)

CUI PBO Series SIP Ac-Dc Power Supplies | Digi-Key Daily

CUI's PBO Series of AC-DC power supplies fit into ultra compact packages as small as 35 x 11 x 18 mm.

CUI 10 W AC/DC Power Supplies | Digi-Key Daily

CUI offers their 10 W power supplies with integrated USB connectors and a full suite of safety approvals.

CUI 15 W and 25 W Isolated DC-DC Converters | Digi-Key Daily

CUI’s PRD15 and PRD25 series are DC-DC converter modules outputting 15 W and 25 W of power from compact, low-profile packages.

CUI 4mm Micro Buzzer | Digi-Key Daily

View CUI's small, lightweight magnetic transducer micro buzzers, and see why they are ideal for portable equipment applications

Tools & Support

Image of CUI's Efficiency Standards External Power Supplies

Efficiency Standards for External Power Supplies

This paper examines the evolution of efficiency standards and provides a summary of the current global legislation impacting external ac-dc power supplies. Learn More

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Designing Intelligence into Commutation Encoders

The benefits of encoders based on capacitive technology offer much more than just improved performance and reliability. Learn how this alternate approach to motion sensing delivers a new level of intelligence for designers utilizing rotary commutation encoders. Learn More

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Reliability Considerations for Power Supplies

Power supplies may not have the glamour, nor get the attention that processors and displays receive, but they are just as vital to system operation. In this application note we look at reliability in power supplies, how it’s measured and how it can be improved. Learn More

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EMI Considerations for Switching Power Supplies

This application note examines the rules and regulations governing control of EMI, discusses types of noise generated by switching power supplies, and provides basic EMI mitigation guidance when designing a power system. Learn More

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Power Quick Guide

This guide provides a quick and easy way to compare our ac-dc power supplies and dc-dc converters based on key specifications and features. Learn More

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Important Considerations When Selecting a Fan for Forced Air Cooling

Selecting the right fan for the thermal management of your design is critical and can have a significant impact on the overall lifespan of a system. This paper takes a closer look at understanding your system needs and requirements, fan performance and the different fan designs and features to consider for your next project. Learn More

Additional Content

AMT Modular Encoder Resources

Application Notes

White Papers

News - View All

3D Models

Novum Advanced Power Resources

Power Resources



Published Articles - View All

Manufacturer Web site