Connecticut's power electronics sector involves companies that design and manufacture vital components for electricity distribution and control. This industry, crucial for modern energy systems, ranges from firms specializing in transformers and inverters to those developed for renewable energy sources and electric vehicles. As global energy demands shift towards sustainability, Connecticut companies are adapting with innovations that enhance efficiency and reliability. Noteworthy trends include a push towards more efficient energy storage systems and advancements in power management technologies. The industry is not just rooted in tradition but also looks to the future with a focus on clean energy solutions.


The list features 25 companies, varying in size from 11 to 5000 employees, based mainly in Connecticut's cities like Shelton and Plainville. Founded between 1920 and 2014, these firms specialize in numerous aspects of power electronics, including RF systems, transformers, and electric vehicle charging solutions. They represent the manufacturing prowess and innovation in areas like renewable energy, aerospace, and telecommunications across diverse sectors.


Read on to discover the top power electronics companies in Connecticut.


Top 25 Power Electronics Companies in Connecticut


1. Carling Technologies

  • Website: carlingtech.com
  • Ownership type: Corporate
  • Headquarters: Plainville, Connecticut, United States (USA)
  • Latest funding: $315.0M, October 2021
  • Founded year: 1920
  • Headcount: 1001-5000
  • LinkedIn: carling-technologies

Carling Technologies, founded in 1920 and based in Plainville, Connecticut, is a manufacturer specializing in electrical components and systems. The company produces a wide range of products, including switches, circuit protection devices, and advanced systems for power distribution and monitoring. Carling serves various industries such as marine, industrial automation, and renewable energy, focusing on delivering reliable products that enhance safety and efficiency in electrical applications. In 2021, Carling Technologies was acquired by Littelfuse, a company known for its extensive portfolio in circuit protection and power distribution. This acquisition has positioned Carling to leverage Littelfuse's resources and expertise, further enhancing its capabilities in the power electronics sector.


2. COMET Technologies USA, Inc.


COMET Technologies USA, Inc., based in Shelton, Connecticut, is a technology company that has been operational since 1992. The firm specializes in RF power delivery systems and components, particularly for industries such as semiconductor and flat panel display manufacturing. Their product offerings include RF generators, impedance matching networks, and vacuum capacitors, all designed to enhance the efficiency and reliability of plasma processes. With a workforce of approximately 148 employees, COMET Technologies is committed to engineering advanced solutions that meet the evolving demands of their customers. Their expertise in RF technology positions them as a significant player in the power electronics sector, particularly in applications requiring precise control of plasma processes.


3. Neeltran Inc

  • Website: neeltran.com
  • Ownership type: Corporate
  • Headquarters: New Milford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: $16.4M, May 2021
  • Founded year: 1973
  • Headcount: 51-200
  • LinkedIn: neeltran-inc

Neeltran Inc, based in New Milford, Connecticut, has been a significant player in the power electronics sector since its inception in 1973. The company specializes in the design and production of transformers and rectifiers tailored for various industrial applications, including aluminum smelting and chemical processing. Neeltran prides itself on its ability to manufacture both rectifiers and transformers in-house, allowing for comprehensive testing of their products before shipment. This capability minimizes integration issues and ensures high-quality performance for their clients. With a workforce of approximately 76 employees, Neeltran emphasizes customer service and support throughout the product lifecycle, from installation to end-of-life services. The company is also ISO-9001-2015 certified, reflecting its commitment to maintaining high standards in quality management. In May 2021, Neeltran secured $16.4 million in funding, indicating ongoing investment in its operations and growth.


4. Apollo Solar

  • Website: apollosolar.com
  • Ownership type: Private
  • Headquarters: Bethel, Connecticut, United States (USA)
  • Founded year: 2003
  • Headcount: 11-50
  • LinkedIn: apollo-solar

Apollo Solar, based in Bethel, Connecticut, is a private company founded in 2003. With a team of 11 to 50 employees, the company focuses on providing energy solutions that cater to the needs of remote telecom and off-grid applications. They manufacture a variety of products, including solar charge controllers and inverters, specifically designed for telecommunications companies and organizations that require dependable energy solutions in difficult environments. Apollo Solar's offerings are aimed at improving energy efficiency and lowering operational costs, making them a significant player in the solar power industry. Their products, such as the T80 HV TurboCharger and True Sine Wave Inverters, are recognized for their reliability and efficiency, even in extreme conditions. The company also emphasizes the importance of remote monitoring and installation training, further solidifying their role in the energy solutions market.


5. Bicron Electronics Co.

  • Website: bicronusa.com
  • Ownership type: Corporate
  • Headquarters: Torrington, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 67%, Poland 33%
  • Latest funding: September 2020
  • Founded year: 1964
  • Headcount: 51-200
  • LinkedIn: bicron-electronics

Bicron Electronics Co., founded in 1964 and based in Torrington, Connecticut, is a manufacturer specializing in engineered transformer and solenoid solutions. The company has built a reputation for providing high-quality and reliable products tailored for various demanding industries, including alternative energy, medical, and military applications. Bicron's product offerings include a range of transformers, such as current sensing transformers and toroidal power transformers, as well as a variety of solenoids designed for actuation and motion control. Their commitment to quality is underscored by continuous ISO certification since 1997, ensuring that their products meet stringent safety and reliability standards. Bicron serves a clientele that includes manufacturers of inverters, power supplies, and power distribution automation equipment, highlighting their integral role in the power electronics sector. The company operates with a focus on durability and efficiency, making their products suitable for rugged applications like locomotives and renewable energy systems.


6. Bloomy

  • Website: bloomy.com
  • Ownership type: Private
  • Headquarters: South Windsor, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 95%, Georgia 5%
  • Founded year: 1992
  • Headcount: 51-200
  • LinkedIn: bloomy-controls

Bloomy is a technology firm based in South Windsor, Connecticut, founded in 1992. With a workforce of approximately 118 employees, the company focuses on automated test, data acquisition, and control systems. Bloomy serves various industries, including aerospace, defense, and electric vehicles, emphasizing the enhancement of product reliability and efficiency. Their product offerings include simulation systems and battery management testing solutions, which are vital for the electric vehicle market. Additionally, Bloomy provides consulting and training services to support their clients' needs, showcasing their commitment to customer service and industry expertise. The company has established itself as a partner in the development of advanced testing systems, particularly in the context of battery management and hardware-in-the-loop testing, which are critical for modern power electronics applications.


7. ECA by Dekko


ECA by Dekko, based in Shelton, Connecticut, has been operational since 1975. The company specializes in manufacturing electrical solutions, including power and data systems, lighting, and electrical components. ECA serves original equipment manufacturers (OEMs) across multiple sectors such as transportation, medical, and industrial applications. Their product offerings include innovative solutions like the Tuck™ and PURL™, which are designed to enhance workspace efficiency and connectivity. ECA emphasizes quality and customer collaboration, ensuring that their products meet the evolving needs of the market. With a workforce of around 107 employees, ECA operates as a private entity, focusing on delivering tailored solutions to its clients.


8. Microphase Corporation USA

  • Website: microphase.com
  • Ownership type: Venture Capital
  • Headquarters: Shelton, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: Seed, $945,000, April 2013
  • Founded year: 1955
  • Headcount: 51-200
  • LinkedIn: microphase-corporation-usa

Microphase Corporation USA, based in Shelton, Connecticut, has been a player in the technology manufacturing sector since its inception in 1955. The company specializes in RF, Microwave, and Millimeter-wave products, providing advanced electronic technology solutions primarily for defense, aerospace, and commercial markets. Their product range includes components and devices such as filters, multiplexers, and amplifiers, which are crucial for applications in telecommunications, public safety, and military systems. Microphase has built a reputation for delivering high-quality, reliable products that meet stringent military standards. With a dedicated workforce and a commitment to continuous research and development, Microphase is positioned to support a variety of sectors, including electronic warfare, radar, and satellite communications. The company has also received funding, with a notable seed investment in 2013, which underscores its ongoing efforts to innovate and expand its product offerings.


9. The Phoenix Company of Chicago

  • Website: phoenixofchicago.com
  • Ownership type: Private
  • Headquarters: Naugatuck, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 75%, China 25%
  • Founded year: 1969
  • Headcount: 51-200
  • LinkedIn: phoenix-company-of-chicago

The Phoenix Company of Chicago, Inc., founded in 1969, is a manufacturer based in Naugatuck, Connecticut, specializing in RF and microwave contact solutions, cable assemblies, and connectors. The company serves a variety of sectors, including military, aerospace, medical, and research, focusing on high-performance products designed for reliability in demanding applications. Their product offerings include PkZ microwave contacts, non-magnetic connectors, and custom solutions tailored to meet specific customer needs. The Phoenix Company emphasizes quality through its certified ISO 9001:2015 Quality Management System, ensuring that all products meet rigorous standards. Their involvement in critical industries highlights their role in providing essential components for power electronics, particularly in applications requiring precision and durability.


10. Coherent | Nufern

  • Website: nufern.com
  • Ownership type: Venture Capital
  • Headquarters: East Granby, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: June 2005
  • Founded year: 2000
  • Headcount: 51-200
  • LinkedIn: nufern

Coherent | Nufern, founded in 2000 and based in East Granby, Connecticut, is a company that specializes in laser technology and advanced materials. They provide a wide array of products and services, including lasers, optical components, and engineered materials, catering to industries such as telecommunications, aerospace, and life sciences. Notably, Coherent | Nufern has made significant strides in the power electronics sector, particularly with their silicon carbide (SiC) power devices and modules. These products are crucial for enhancing the efficiency and performance of electric vehicles and other energy systems. Their expertise in high-performance solutions for manufacturing and research applications further underscores their role in the power electronics industry. The company operates with a workforce of around 80 employees and has not reported any recent funding since 2005.


11. Gyre9

  • Website: gyre9.com
  • Ownership type: Private
  • Headquarters: Southbury, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2006
  • Headcount: 11-50
  • LinkedIn: gyre9

Gyre9 is a product development firm based in Southbury, Connecticut, established in 2006. The company specializes in the research, design, engineering, and manufacturing of electric vehicle supply equipment (EVSE), particularly focusing on electric vehicle charging stations. Gyre9 operates from a facility that integrates all stages of product development, allowing them to manage projects from concept to production. They cater to a wide range of clients, including startups and Fortune 500 companies, providing innovative solutions that are both market-ready and tailored to client specifications. Gyre9's expertise in the EVSE sector includes the design and engineering of Level 2 chargers for residential, commercial, and public use. Their commitment to quality and customer satisfaction has earned them a solid reputation in the industry, making them a notable player in the electric vehicle charging market.


12. Lex Products

  • Website: lexproducts.com
  • Ownership type: Corporate
  • Headquarters: Trumbull, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Latest funding: September 2015
  • Founded year: 1989
  • Headcount: 51-200
  • LinkedIn: lex-products-llc

Lex Products, founded in 1989 and based in Trumbull, Connecticut, is a company that specializes in power distribution and lighting solutions. With a workforce of around 131 employees, Lex Products has carved out a niche in providing energy storage systems and portable distribution units. Their primary markets include entertainment, industrial, and military sectors, where they offer products designed to meet the rigorous demands of these industries. The company is known for its durable and efficient solutions, such as the Voltstack Energy Storage Systems, which provide silent, emission-free power for temporary projects. Lex Products also manufactures a range of cable assemblies, power distribution boxes, and custom-engineered solutions, ensuring they meet the specific needs of their clients. Their commitment to quality and innovation has established them as a reliable partner in power management solutions.


13. Amphenol Global Interconnect Systems

  • Website: amphenol-gis.com
  • Ownership type: Private
  • Headquarters: Wallingford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 33%, Taiwan 17%, Germany 17%, Other 33%
  • Founded year: 1932
  • Headcount: 5001-10000
  • LinkedIn: amphenol-gis

Amphenol Global Interconnect Systems, based in Wallingford, Connecticut, is a manufacturer that specializes in interconnect solutions across multiple industries, including IT, medical, automotive, and telecommunications. Founded in 1932, the company has built a reputation for providing reliable connectivity solutions. Their product range includes cable assemblies, power solutions, and backplane assemblies, which are critical for ensuring effective communication and power distribution in various applications. Amphenol GIS collaborates closely with customers to address their interconnect challenges, emphasizing innovation and quality in their offerings. The company operates under the larger Amphenol Corporation umbrella, which is known for its extensive experience in the interconnect market. Amphenol GIS is ISO-certified, reflecting its commitment to quality and environmental standards. Their global presence, with manufacturing capabilities in several countries, allows them to serve a wide array of markets efficiently.


14. Transformateurs Delta

  • Website: delta.xfo.com
  • Ownership type: Private
  • Headquarters: Granby, Connecticut, United States (USA)
  • Employee distribution: Canada 100%
  • Founded year: 1983
  • Headcount: 51-200
  • LinkedIn: transformateurs-delta

Transformateurs Delta, based in Granby, Connecticut, has been a player in the electrical manufacturing industry since its inception in 1983. The company specializes in the design and production of dry-type transformers and reactors, which are crucial for effective power distribution. Their product range includes control transformers, low and medium voltage transformers, and solutions for non-linear loads, such as harmonic mitigating transformers. Delta Transformers serves a variety of sectors, including commercial, institutional, and industrial markets, providing tailored solutions to meet specific power distribution challenges. With a commitment to quality and reliability, the company has established itself as a trusted provider in the electrical industry, particularly in the context of evolving demands such as electric vehicle charging infrastructure.


15. National Breaker Services LLC


National Breaker Services LLC, founded in 1999 and based in Middlebury, Connecticut, is a private company that specializes in manufacturing electrical equipment, particularly focusing on switchgear and circuit breaker solutions. The company is known for its Citadel switchgear, which is designed to meet the rigorous demands of utility and industrial applications. National Breaker Services offers a range of products, including fixed and draw-out vacuum breakers, and provides engineering services aimed at extending the life of electrical infrastructure. Their innovative retrofitting solutions allow for the modernization of existing systems, enhancing performance and reliability. The company operates entirely within the United States, serving a niche market that values both durability and cost-effectiveness in electrical components.


16. Anton/Bauer

  • Website: antonbauer.com
  • Ownership type: Private
  • Headquarters: Shelton, Connecticut, United States (USA)
  • Founded year: 1970
  • Headcount: 51-200
  • LinkedIn: anton-bauer

Anton/Bauer, founded in 1970 and based in Shelton, Connecticut, is a private company that specializes in power solutions for the film and television industry. They offer a range of products, including batteries, chargers, and accessories, all designed to support high-performance cinematography and broadcasting. Their clientele includes production companies and cinematographers who depend on reliable power sources during shoots. The company has a strong reputation for quality and safety, ensuring that their products meet the rigorous demands of the industry. Anton/Bauer is also involved in sustainability initiatives, such as their Salt-E Dog product, which provides a portable power solution with minimal environmental impact. Their focus on innovation and customer needs positions them as a significant player in the power electronics sector, particularly within their niche.


17. Able Coil & Electronics Co., Inc.


Able Coil & Electronics Co., Inc. is a manufacturing firm based in Bolton, Connecticut, founded in 1969. The company specializes in custom electromagnetic assemblies and components, catering to a wide array of industries such as military, medical, automotive, and communications. With a commitment to quality and customer collaboration, Able Coil provides tailored solutions that meet specific client needs. Their product range includes precision-wound coils, transformers, and electromechanical assemblies, all of which play a crucial role in power electronics. The company operates a 20,000 square foot manufacturing facility equipped for both high and low volume production runs, utilizing advanced winding techniques and in-house tooling capabilities. Able Coil's engineering team works closely with clients throughout the product development cycle, ensuring that prototypes and final products meet stringent performance and reliability standards. They have established a solid reputation for delivering millions of components annually, demonstrating their active involvement in the power electronics industry.


18. Plainville Electrical Products Company (PEPCO)


Plainville Electrical Products Company (PEPCO), founded in 1922 and based in Bristol, Connecticut, is a private firm that specializes in electrical distribution and control systems. The company has carved out a significant niche in providing solutions for military, commercial, and industrial applications. PEPCO designs and manufactures a wide array of products, including electrical switchboards used in the U.S. Navy's most advanced submarines and destroyers. Their expertise extends beyond military vessels to include systems for gas turbine engines, nuclear fuel handling, and even automated fish farms. With a workforce of around 34 employees, PEPCO operates from a 40,000 square foot facility, where they manage every aspect of their projects, from design to manufacturing. Their commitment to meeting rigorous specifications and providing reliable solutions has made them a trusted partner in critical electrical applications.


19. The Kinsley Group

  • Website: kinsley-group.com
  • Ownership type: Private
  • Headquarters: East Granby, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1964
  • Headcount: 51-200
  • LinkedIn: kinsley-power-systems

The Kinsley Group, based in East Granby, Connecticut, has been a player in the energy solutions market since its founding in 1964. With a workforce of approximately 157 employees, the company specializes in providing industrial and residential power systems. Their product range includes generators powered by diesel, propane, and natural gas, as well as cogeneration systems that efficiently produce both electricity and useful heat. Additionally, they offer battery storage solutions, which are increasingly important in today's energy landscape. Kinsley Group caters to a variety of sectors, including healthcare, education, and telecommunications, ensuring that their clients have access to reliable energy sources. Their commitment to service and maintenance further enhances their role in the power electronics industry, as they provide ongoing support for the systems they install.


20. Infinity Fuel Cell & Hydrogen, Inc.


Infinity Fuel Cell & Hydrogen, Inc., founded in 2002 and based in Windsor, Connecticut, is a private energy technology firm that specializes in advanced fuel cell systems and hydrogen generation solutions. The company has carved out a niche in providing reliable energy systems for demanding applications, including aerospace and renewable energy sectors. Their innovative technologies, particularly in Proton Exchange Membrane (PEM) fuel cells and regenerative energy systems, cater to organizations that require efficient and scalable power solutions. Infinity has collaborated with NASA and other U.S. government agencies, achieving significant breakthroughs in fuel cell design that enhance performance and reliability. Their products are designed to operate in extreme environments, making them suitable for applications such as unmanned underwater vehicles and space missions. Infinity's commitment to advancing fuel cell technology is evident in their recent achievements, including successful space flight experiments and contracts for lunar fuel cell power systems.


21. Winchester Interconnect

  • Website: winconn.com
  • Ownership type: Corporate
  • Headquarters: Milford, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 53%, Mexico 35%, Malaysia 9%, Other 2%
  • Latest funding: October 2018
  • Founded year: 1941
  • Headcount: 1001-5000
  • LinkedIn: winchester-interconnect

Winchester Interconnect, founded in 1941 and based in Milford, Connecticut, is a manufacturer known for its high-precision connectors and cable assemblies. The company serves critical sectors such as aerospace, defense, medical, and industrial automation. Their products are engineered to perform reliably in demanding environments, making them essential for applications where failure is not an option. Winchester Interconnect collaborates closely with clients to develop custom solutions tailored to specific needs, ensuring optimal performance in various conditions. Their extensive product range includes RF and microwave connectors, hermetic connectors, and specialized cable assemblies, all designed to meet stringent industry standards. The company has a global presence, with operations in the United States, Mexico, and Malaysia, reflecting its commitment to serving a broad customer base across multiple industries.


22. Schulz Group, Power Systems by Timken

  • Website: schulzelectric.com
  • Ownership type: Private
  • Headquarters: East Haven, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 1927
  • Headcount: 51-200
  • LinkedIn: schulz-electric

Schulz Group, Power Systems by Timken, based in East Haven, Connecticut, has been a prominent service provider in the electric motor and generator repair industry since its founding in 1927. The company specializes in a range of services, including energy efficiency solutions, preventative maintenance, and diagnostic services. They cater to various sectors, including manufacturing, power generation, and renewable energy, helping clients minimize downtime and enhance operational efficiency. Schulz Group is part of The Timken Company, which positions them for growth and innovation in the power systems market. Their commitment to quality is reflected in their ISO 9001:2008 certification, and they are recognized for their expertise in large motor and generator repairs, including specialized services for nuclear applications. With a focus on continuous improvement and customer satisfaction, Schulz Group remains a vital resource for businesses seeking reliable power system solutions.


23. Circuit Breaker Sales NE

  • Website: cbsalesne.com
  • Ownership type: Private
  • Headquarters: Seymour, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2014
  • Headcount: 51-200
  • LinkedIn: circuit-breaker-sales-ne

Circuit Breaker Sales NE, Inc., founded in 2014 and based in Seymour, Connecticut, is a private company that specializes in electrical equipment and services. The firm focuses on circuit breakers, switchgear, and motor controls, providing essential remanufacturing, repair, and engineering services to businesses and organizations in the energy and industrial sectors. Their expertise ensures the reliability and safety of electrical systems, which is crucial for operational efficiency. Circuit Breaker Sales NE is ISO 9001 certified, demonstrating their commitment to quality management, and they also hold ISO 14001 certification for environmental management. The company is a charter member of the Professional Electrical Apparatus Recycling League (PEARL), which underscores their dedication to quality and safety in the recycling and reuse of electrical power equipment. With a workforce of around 42 employees, they are well-equipped to handle emergency responses and provide life extension services for aging electrical equipment, making them a valuable player in the power electronics industry.


24. ARS Products LLC

  • Website: arsproducts.com
  • Ownership type: Private
  • Headquarters: Woodstock, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 100%
  • Founded year: 2003
  • Headcount: 11-50
  • LinkedIn: ars-products-llc

ARS Products LLC, founded in 2003 and based in Woodstock, Connecticut, is a private company that specializes in RF signal distribution and switching equipment. With a dedicated team boasting over 100 years of combined experience, ARS Products serves customers primarily in the telecommunications and defense sectors. Their product offerings include routers, switch matrices, beamforming networks, and multi-couplers, all designed to enhance signal quality and reliability. The company emphasizes innovation, regularly investing in research and development to stay ahead of market needs. They also provide engineering services, ensuring that their solutions are tailored to meet specific customer requirements. ARS Products is committed to quality, with a robust quality management system certified to ISO 9001:2015 standards. Their focus on technical support and customer service further solidifies their position in the industry.


25. Mitsubishi Power Aero

  • Website: aero.power.mhi.com
  • Ownership type: Private
  • Headquarters: Glastonbury, Connecticut, United States (USA)
  • Employee distribution: United States (USA) 78%, Algeria 7%, Russia 2%, Other 12%
  • Founded year: 1961
  • Headcount: 51-200
  • LinkedIn: pw-power-systems

Mitsubishi Power Aero LLC, based in Glastonbury, Connecticut, is a power generation company that has been operational since 1961. The firm specializes in aero-derivative gas turbines, which are derived from aircraft engine technology, and offers a range of related services. Their products are designed to provide flexible and efficient power solutions, catering to the needs of energy producers globally. With a commitment to innovation and customer collaboration, Mitsubishi Power Aero has installed over 2,000 gas turbines in more than 50 countries. Their offerings include not only gas turbines but also comprehensive maintenance and support services, ensuring that clients can optimize their power generation capabilities. The company is part of Mitsubishi Power Americas, Inc., and plays a significant role in addressing the evolving energy demands, particularly in the context of increasing reliance on natural gas and renewable energy sources.



Power Electronics Insights: Key Companies in Connecticut


CompanyHeadquarterSizeFoundedOwnership
Carling TechnologiesPlainville, Connecticut, United States (USA)1001-50001920Corporate
COMET Technologies USA, Inc.Shelton, Connecticut, United States (USA)51-2001992Private
Neeltran IncNew Milford, Connecticut, United States (USA)51-2001973Corporate
Apollo SolarBethel, Connecticut, United States (USA)11-502003Private
Bicron Electronics Co.Torrington, Connecticut, United States (USA)51-2001964Corporate
BloomySouth Windsor, Connecticut, United States (USA)51-2001992Private
ECA by DekkoShelton, Connecticut, United States (USA)51-2001975Private
Microphase Corporation USAShelton, Connecticut, United States (USA)51-2001955Venture Capital
The Phoenix Company of ChicagoNaugatuck, Connecticut, United States (USA)51-2001969Private
Coherent | NufernEast Granby, Connecticut, United States (USA)51-2002000Venture Capital
Gyre9Southbury, Connecticut, United States (USA)11-502006Private
Lex ProductsTrumbull, Connecticut, United States (USA)51-2001989Corporate
Amphenol Global Interconnect SystemsWallingford, Connecticut, United States (USA)5001-100001932Private
Transformateurs DeltaGranby, Connecticut, United States (USA)51-2001983Private
National Breaker Services LLCMiddlebury, Connecticut, United States (USA)11-501999Private
Anton/BauerShelton, Connecticut, United States (USA)51-2001970Private
Able Coil & Electronics Co., Inc.Bolton, Connecticut, United States (USA)51-2001969Private
Plainville Electrical Products Company (PEPCO)Bristol, Connecticut, United States (USA)51-2001922Private
The Kinsley GroupEast Granby, Connecticut, United States (USA)51-2001964Private
Infinity Fuel Cell & Hydrogen, Inc.Windsor, Connecticut, United States (USA)11-502002Private
Winchester InterconnectMilford, Connecticut, United States (USA)1001-50001941Corporate
Schulz Group, Power Systems by TimkenEast Haven, Connecticut, United States (USA)51-2001927Private
Circuit Breaker Sales NESeymour, Connecticut, United States (USA)51-2002014Private
ARS Products LLCWoodstock, Connecticut, United States (USA)11-502003Private
Mitsubishi Power AeroGlastonbury, Connecticut, United States (USA)51-2001961Private


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