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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

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As a leader in the power supply industry, CUI energizes your ideas with a diverse range of leading ac-dc power supplies and dc-dc converters. Learn More

Thermal Management Solutions

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Defeat heat in your application with CUI’s dc fans, blowers, heat sinks, and Peltier devices—all aimed at enhancing system longevity and performance. Learn More

Audio Solutions

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CUI’s buzzers, speakers and microphones are sound solutions for any design, offering a variety of options for maximum flexibility. Learn More

Featured Products

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Interconnect Solutions

Comprised of power, audio, DIN, RCA and USB connectors, CUI offers quality connections for a range of applications, simplifying the design process. Learn More

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Motion Solutions

CUI is revolutionizing encoder technology with its ground breaking AMT modular encoders that deliver both accuracy and durability without tradeoffs. Learn More

Product Listing View All

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Newest Products View All (131)

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IP Rated DC Power Jacks

CUI’s waterproof DC power jack connectors carry ratings of IP67 to deal with the harsh conditions found in industrial and outdoor applications.

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AMT10/AMT11 Series Modular Incremental Encoder Kits

CUI's AMT10 and AMT11 series are rugged, high-accuracy incremental encoders with capacitive sensing technology and are not susceptible to dirt, dust, and oil.

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Open Frame AC-DC Power Supplies

CUI VOF family of open frame ac-dc power supplies are available at DigiKey. VOFs offer efficient performance, compact size and low power consumption.

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IP-Rated Audio Solutions

CUI's waterproof speakers, microphones, and buzzers offer ingress protection (IP) ratings up to IP68, diameters as small as 4 mm, and depths as low as 1.5 mm.

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AC Power Cords

CUI's 6-foot AC power cords offer country- and region-specific plug options, C7 and C13 plugs for C8 and C14 inlets, and flat or round style options.

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PDQE10 Series Isolated DC-DC Converters

CUI's PDQE10 series isolated DC-DC converters are available in board, chassis, and DIN-rail versions and feature a low-profile and a remote on/off control.

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Product Training Modules View All (27)


MEMS Microphones

Duration: 10 minutes

This presentation will provide an overview of the MEMS Microphone Technology from CUI Inc.


Power Supply Safety Standards, Agencies and Marks

Duration: 10 minutes

Reviewing the power supply international safety standards, the major agencies, and regional safety marks.

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DC-DC Converters for Renewable Energy Applications

Duration: 5 minutes

This is an overview of CUI’s AE series of wide input DC-DC converters, including their benefits, features, and use in renewable energy applications


How to Select a Fan for Forced Air Cooling

Duration: 10 minutes

This module will provide an overview on how to select the proper fan for forced air cooling.

Featured Videos View All (27)

CUI IEC 62368-1 Adapters | Digi-Key Daily

CUI’s wall plug and desktop adapters are compliant with IEC 62368-1 safety standards to help keep the user in-line with US and EU regulations.

Publish Date: 2019-03-28

CUI MEMS Microphones | Digi-Key Daily

CUI’s MEMS microphones provide users with improved audio quality and performance in compact, low-profile packages as small as 2.75 mm x 1.85 mm x 0.95 mm.

Publish Date: 2019-01-24

CUI CMS Series | Digi-Key Daily

CMS series of waterproof micro speakers with ingress protection (IP) ratings of IP67 from CUI are housed in compact packages as small as 15 mm x 11 mm.

Publish Date: 2018-11-01

CUI VGS-B Metal Case AC-DC Power Supplies | Digi-Key Daily

VGS-B series of compact, chassis mount AC-DC power supplies from CUI are housed in an enclosed metal case. Offering power ratings from 35 W to 350 W, these power supplies feature low 30 mm profiles and packages as small as 99 mm x 82 mm x 30 mm.

Publish Date: 2018-10-05

Tools & Support

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IEC 60601-1 Medical Design Standards for Power Supplies

With the coming transition to IEC 60601-1 4th edition, designers of medical equipment must consider a range of new requirements. In this paper, CUI takes a look at the evolution of IEC 60601-1 and its implications for engineers specifying power supplies for medical devices. Learn More

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What is the Most Effective Way to Commutate a BLDC Motor?

Learn about the different methods and tradeoffs for commutating BLDC motors and how CUI's AMT commutation encoder series is providing a valuable solution to the quickly-growing BLDC market. Learn More

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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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arcTEC™ Structure

This paper takes a look at CUI's arcTEC™ structure, found in its line of high performance Peltier modules, versus general Peltier module construction. Learn how the arcTEC structure provides improved performance and reliability, outperforming conventional thermoelectric cooler design. Learn More

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IEC 62368-1 An Introduction to the New Safety Standard for ICT and AV Equipment

The established safety standards for ICT equipment (60950-1) and AV equipment (60065) are to be phased out in favor of a single standard, 62368-1, in North America and the EU. The new standard introduces a different, hazard-based philosophy to product testing. What does it mean for product certification, and how can OEMs best manage the transition? Learn More

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omniCOOL™ System

Discover how CUI's omniCOOL™ system, found in its line of sleeve bearing axial fans, bridges the gap between traditional sleeve and ball bearing designs, thanks to dramatically reduced fan friction, wobble, and noise, in addition to improved fan life and performance. Learn More

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