CUI
CUI Inc. manufactures AC-DC power supplies, DC-DC converters, and customizable power adapters for consumer/IoT, medical, industrial, EV, railway, and networking customers. Founded in 1989 and based in Tualatin, Oregon, it operates as a wholly-owned brand under Bel Fuse Inc.
- Company typePrivate
- Founded1989
- HeadquartersTualatin, United States
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What CUI does
CUI Inc. is a power supply manufacturing company founded in 1989 and headquartered in Tualatin, Oregon. The company designs and produces AC-DC power supplies, DC-DC converters, and external power adapters (desktop and wall plug configurations), with product variants spanning board mount, chassis mount, and DIN rail form factors. Its core technology centers on power conversion and management, with emphasis on universal input voltage ranges, high efficiency, rugged design, and full safety approvals. CUI differentiates through extensive customization capabilities — allowing customers to specify branding, mechanical, and electrical modifications on adapters and converters when off-the-shelf parts are insufficient.
The company serves six end-markets: consumer & IoT, medical, and industrial as primary segments, with EV/eMobility, railway, and networking & data centers as secondary verticals. Go-to-market is sales-led and distribution-driven: CUI sells through authorized distribution partners, manufacturer's representatives, and the Bel extranet portal, supported by engineer-focused technical resources including a CAD model library, competitor cross-reference tool, and a documentation resource library with datasheets, compliance certifications, and EOL/PCN notifications. Pricing is quote-based and non-public, particularly for custom solutions.
In 2019, CUI was acquired by Bel Fuse Inc., a diversified publicly-traded electronics manufacturer, and now operates as a wholly-owned brand alongside Cinch Connectivity Solutions, EOS Power, Melcher, and Signal Transformer. CUI retains its brand identity and engineer-focused product approach while benefiting from Bel's global infrastructure across North America, EMEA, and APAC. The company employs 101–250 people and operates as a subsidiary under the Bel corporate umbrella.
CUI firmographics
Firmographics- Name
- CUI
- Legal name
- CUI Inc.
- Website
- https://cui.com
- Company type
- Private
- Founded year
- 1989
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- CUI Inc. manufactures AC-DC power supplies, DC-DC converters, and customizable power adapters for consumer/IoT, medical, industrial, EV, railway, and networking customers. Founded in 1989 and based in Tualatin, Oregon, it operates as a wholly-owned brand under Bel Fuse Inc.
- Ownership category
- akta.pro rank
CUI industry classification
Industry- Product category
- Electronic Components - Power Supplies
- NAICS
- Other Electrical Equipment and Component Manufacturing (3359)
- SIC
- Electronic & Other Electrical Equipment (No Computer Equip) (3600)
- akta.pro primary industry
- AC-DC Power Supplies (Industrial PSUs, DIN-rail, enclosed/open-frame) (IMAGADAA)
- akta.pro secondary industry
- Power Conversion Systems for Storage & Charging (PCS, bidirectional inverters, DC/DC) (IMAGAHAE)
Keywords
Where CUI is headquartered
LocationHeadquarters
- HQ city
- Tualatin
- HQ country
- United States
- HQ region
- North America
Markets served
CUI business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Supply Chain, Operations, Personnel, Marketing or Sales, Technology or R&D
Revenue model
- Power Supply Products: CUI generates revenue through the sale of power supplies including AC-DC converters, DC-DC converters, desktop adapters, wall plug adapters, and custom power solutions. Products are sold through distribution partners and manufacturer's representatives.
Go-to-market motion1 record
Distribution channels3 records
Marketing channels4 records
CUI product offering
Product offeringCore offering
CUI designs and manufactures AC-DC power supplies and DC-DC converters, including customizable wall plug and desktop power adapters, embedded supplies in board mount, chassis mount, and DIN rail configurations. The portfolio targets OEMs and design engineers in consumer, IoT, industrial, medical, railway, EV/eMobility, and networking/data center applications, with extensive modification options for branding, mechanical, and electrical specifications.
Product overview
CUI offers a portfolio of AC-DC power supplies and DC-DC converters designed for the consumer, IoT, industrial, and medical sectors. The product lineup consists of four main categories: Customizable Power Adapters (custom wall plugs and desktop adapters with modification options), Desktop & Wall Plug Adapters (external AC-DC power supplies with safety approvals), AC-DC Converters (embedded supplies in board mount, chassis mount, and DIN rail configurations), and DC-DC Converters (with diverse package configurations and voltage options). The company emphasizes customization capabilities, allowing customers to modify solutions to meet specific specifications when off-the-shelf products are insufficient.
Differentiator
Problem solved
Functional benefit
Products and services
- Customizable Power Adapters Versatile range of customizable wall plugs and desktop power adapters with comprehensive support for branding, mechanical, and electrical modifications to ensure seamless integration into product design, targeted at OEMs needing tailored external power solutions.
- Desktop & Wall Plug Adapters External AC-DC power supplies available in wall plug and desktop adapter configurations, with full safety approvals and high efficiency ratings, designed for OEM products requiring reliable external power delivery.
- AC-DC Converters Embedded AC-DC power supplies offered in board mount, chassis mount, and DIN rail configurations, featuring universal input voltage ranges, rugged design, and high efficiency, primarily targeting industrial and other demanding application environments.
- DC-DC Converters Diverse selection of DC-DC converters providing multiple package configurations, input and output voltage options, protections, and special features, with an emphasis on quality and technical expertise for varied OEM applications.
Companies that use CUI
Customer profileSegments6 records
Ideal customer profiles1 record
CUI technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature3 records
CUI partnerships and signals
Strategic signalPartnerships
One partnership is on record.
- Bel Fuse Inc.coreBel Fuse Inc. acquired CUI Inc. in 2019, bringing CUI into the Bel family of brands including Cinch Connectivity Solutions, Enercon Technologies, and MilPower Source. CUI operates as a brand under Bel's corporate umbrella while maintaining its engineer-focused approach and product portfolio.
Scale indicators2 records
Recent moves5 records
Expansion highlights5 records
CUI competitors and assessment
Company assessmentDirect peers
- Mornsun: Mornsun manufactures AC-DC and DC-DC converters for industrial, railway, and medical applications — a close competitor in CUI's target verticals with broad product-line overlap.
- Mean Well: Mean Well is one of the largest global manufacturers of standard AC-DC switching power supplies and DC-DC converters, directly competing with CUI's core product lines across industrial, medical, and consumer applications.
- Phihong: Phihong specializes in AC-DC adapters, power supplies, and PoE injectors — directly comparable to CUI's wall plug and desktop adapter business across networking, consumer, and IoT segments.
- Advanced Energy (Artesyn Embedded Power): Advanced Energy's Artesyn Embedded Power unit produces highly configurable AC-DC and DC-DC power supplies for industrial, medical, and networking — directly comparable to CUI's configurable embedded power line.
- TDK-Lambda: TDK-Lambda is a leading manufacturer of AC-DC and DC-DC power supplies serving industrial, medical, and test & measurement markets — a direct competitor to CUI in embedded and configurable power conversion.
- RECOM Power: RECOM manufactures DC-DC converters, AC-DC modules, and switching regulators, overlapping with CUI's DC-DC converter portfolio and serving similar industrial and embedded applications.
- Astrodyne TDI: Astrodyne TDI designs and manufactures AC-DC power supplies, DC-DC converters, and EMI filters for industrial, medical, and semiconductor applications — directly comparable to CUI's customizable power portfolio.
- XP Power: XP Power designs and manufactures AC-DC and DC-DC power supplies for industrial, medical, and technology markets, closely overlapping CUI's vertical mix and customization-driven model.
Broad incumbents
- Delta Electronics: Delta Electronics is a broad power and thermal management incumbent offering AC-DC, DC-DC, and EV charging solutions; competes with CUI across multiple verticals at much larger scale.
Emerging players
- Wall Industries: Wall Industries produces custom and modified AC-DC and DC-DC power supplies, sharing CUI's customization-led approach in industrial and medical markets at a smaller scale.
Market position
Strengths4 records
Weaknesses4 records
Competitive moat4 records
Key risks5 records
Key highlights6 records
Customer concentration
CUI social profiles
Digital presenceCUI financial estimates
Financial estimateRevenue estimate
Valuation estimate
CUI leadership team
Management profileNumber of profiles
CUI funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
CUI M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about CUI
What does CUI do?
CUI designs and manufactures AC-DC power supplies and DC-DC converters, including customizable wall plug and desktop power adapters, embedded supplies in board mount, chassis mount, and DIN rail configurations. The portfolio targets OEMs and design engineers in consumer, IoT, industrial, medical, railway, EV/eMobility, and networking/data center applications, with extensive modification options for branding, mechanical, and electrical specifications.
Is CUI a public or private company?
CUI is a private company. It is classified as corporate owned and is currently operating.
When was CUI founded?
CUI was founded in 1989. It employs 101 to 250 people.
Where is CUI based?
CUI is headquartered in Tualatin, United States, in the North America region.
How does CUI make money?
One revenue line is on record: power Supply Products.
Who are CUI's main competitors?
Direct peers on record are Mornsun, Mean Well, Phihong, Advanced Energy (Artesyn Embedded Power), TDK-Lambda, RECOM Power, Astrodyne TDI and XP Power. Delta Electronics is listed as a broad incumbent. Wall Industries is listed as an emerging player.
Does CUI have an API?
No public API is recorded for CUI.
What industry is CUI in?
CUI's product category is Electronic Components - Power Supplies. Its primary akta.pro industry code is IMAGADAA, AC-DC Power Supplies (Industrial PSUs, DIN-rail, enclosed/open-frame), with a secondary code of IMAGAHAE, Power Conversion Systems for Storage & Charging (PCS, bidirectional inverters, DC/DC). Its NAICS code is 3359 and its SIC code is 3600.