Vacon
Finnish manufacturer of variable-speed AC drives and renewable-energy inverters, acquired by Danfoss in 2014.
Last updated August 31, 2026
Overview
Vacon was a Finnish industrial technology company that designed and manufactured variable-speed AC drives for controlling electric motors, together with inverter systems used in renewable-energy generation. The name Vacon is derived from Vaasa Control Ltd., reflecting the company’s Finnish origins and its headquarters in Vaasa. Its products were used to regulate motor speed and torque in industrial processes, helping customers improve process control, reduce mechanical stress, and lower electricity consumption. The company also supplied power-conversion equipment for renewable-energy applications, where inverters convert generated electricity into a form suitable for electrical networks and other systems. The company developed from a Finnish engineering operation into an international drive manufacturer with research, development, and production facilities in Europe, Asia, and North America. It also maintained sales offices in approximately 30 countries and relied on representatives and service partners in nearly 90 countries. This network allowed Vacon to serve industrial automation, machinery, infrastructure, and energy customers beyond Finland. Its portfolio included the Vacon NX family of frequency converters and the Vacon 100 series, among other AC-drive and inverter products. Vacon was publicly traded in Finland. Its shares were quoted on the main list of the Helsinki Stock Exchange, under the ticker VAC1V, before the company was acquired. In 2013, the business reported revenue of EUR 403.0 million and had approximately 1,600 employees worldwide. Vacon associated its products with energy efficiency and estimated that the installed base of its drives helped save approximately 55 terawatt-hours of energy in 2013. It also reported that its AC drives supported the production of approximately 22 terawatt-hours of renewable energy. These figures were company estimates rather than independent measurements. Vacon attracted wider public attention in January 2014 when U.S. President Barack Obama visited its research-and-development facility at Research Triangle Park in North Carolina. The visit highlighted the company’s presence in advanced manufacturing and industrial technology in the United States. The company was also mentioned in reporting about the Stuxnet cyberattack because Vacon NX frequency converters were identified as one of the converter types targeted by the malware at Iran’s Natanz enrichment facility. The reference concerned the equipment targeted by the worm and did not establish misconduct by Vacon. In 2014, Danfoss purchased Vacon. Following the transaction, Vacon ceased to operate as an independent listed company and its activities were incorporated into Danfoss’s drives business. Vacon is therefore best understood as a former independent Finnish company and a legacy brand associated with Danfoss Drives rather than as a currently independent public manufacturer.
History
Vacon originated in Finland and took its name from Vaasa Control Ltd., linking the business to Vaasa, where it was headquartered. Founded in 1993, the company focused on variable-speed AC drives, also known as frequency converters or variable-frequency drives. These devices regulate the frequency and voltage supplied to electric motors, allowing machinery to operate at speeds suited to changing process requirements. By reducing unnecessary motor speed and improving control, AC drives can contribute to lower energy use and more efficient industrial operations. The company expanded from its Finnish base into an international industrial-technology business. It established production and research-and-development facilities in Europe, Asia, and North America, while building sales offices in about 30 countries. Sales representatives and service partners extended its commercial and service reach to nearly 90 countries. Vacon’s customer base and applications covered industrial machinery, process industries, infrastructure, motor-driven equipment, and renewable-energy systems. In addition to motor drives, the company supplied inverter technology for generating electricity from renewable sources. Its product portfolio included the Vacon NX family and the Vacon 100 series. The NX range was associated with industrial variable-speed motor control and was available in configurations intended for different power and application requirements. The Vacon 100 family represented a later generation of drive products aimed at general industrial and process-control uses. Product-level technical configurations varied by application, and the available reference material does not support a complete model-by-model chronology. Vacon promoted the energy-saving role of its technology. For 2013, it estimated that its products helped save approximately 55 terawatt-hours of energy and that electricity generated from renewable sources using its AC drives amounted to approximately 22 terawatt-hours. These figures illustrate the company’s preferred sustainability narrative, although they were company estimates and are not presented here as independently audited totals. Vacon was a public company in Finland. Its shares traded on the main list of the Helsinki Stock Exchange under the symbol VAC1V. In 2013, it recorded revenue of EUR 403.0 million and employed approximately 1,600 people worldwide. Its international engineering and service footprint made it a significant specialist in the global variable-speed-drive market. The company received public attention in the United States in January 2014, when President Barack Obama visited its research-and-development site at Research Triangle Park in North Carolina. Vacon also appeared in discussions of the Stuxnet cyberattack because the malware targeted industrial control environments containing Vacon NX converters among other equipment. This association relates to the technical target profile of the attack and does not by itself indicate that Vacon caused or participated in the attack. Danfoss purchased Vacon in 2014. The transaction ended Vacon’s status as an independent listed company and brought its technology, personnel, and operations into Danfoss’s drives organization. The independent Vacon corporate entity is consequently defunct, while its products and capabilities became part of the broader Danfoss Drives business. The extent to which the Vacon name continued on individual products or in customer documentation after integration is not fully established by the supplied sources.
- 2014U.S. presidential visit to the North Carolina R&D facility
President Barack Obama visits Vacon’s research-and-development facility at Research Triangle Park on January 15.
- 2014Danfoss acquires Vacon
Danfoss purchases Vacon, after which Vacon is integrated into Danfoss’s drives business and no longer operates as an independent listed company.
- 2013Vacon reports international scale and energy-impact estimates
The company reports EUR 403.0 million in revenue, approximately 1,600 employees, and an international production, research, sales, and service network. It estimates that its products helped save approximately 55 TWh of energy during the year.
- 1993Vacon is founded in Finland
Vacon is established as a Finnish company focused on variable-speed AC drives and related power-conversion technology.
Products and positioning
A technically focused industrial-drive brand positioned around reliable motor control, process optimization, energy efficiency, and power conversion for industrial and renewable-energy applications.
Vacon NXVariable-frequency AC drives
The Vacon NX family comprised frequency converters for adjustable-speed control of electric motors. It was associated with industrial automation and process applications requiring controlled motor speed, torque, and energy use. The NX platform is also notable in cybersecurity history because Stuxnet reporting identified Vacon NX converters among the equipment targeted by the malware at Iran’s Natanz facility. The available references do not provide a complete list of ratings, variants, or individual launch dates.
Vacon 100Industrial AC drives
The Vacon 100 series was an AC-drive product family for controlling electric motors in industrial and process environments. Its role was to match motor operation to application demand, supporting process control and potential energy savings. It formed part of Vacon’s broader portfolio of drive and inverter technologies before the company was acquired and integrated into Danfoss.
Vacon renewable-energy invertersRenewable-energy power converters
Vacon supplied inverter systems used in renewable-energy generation. These products performed power-conversion functions needed to connect generated electricity with electrical systems and networks. The reference material identifies renewable-energy inverters as a principal business area but does not specify a complete product-family naming structure.
Flagship businesses
- Vacon NX series
- Vacon 100 series
Brand decisions
- 2014Accept acquisition by DanfossM&A
Vacon was an international public company specializing in AC drives and renewable-energy inverters, with shares traded on the Helsinki Stock Exchange.
What changed. Danfoss purchased Vacon, bringing the company into the Danfoss drives organization.
Aftermath. Vacon ceased to operate as an independent listed company and became part of Danfoss Drives. The supplied sources do not provide transaction-value or detailed integration terms.
Recent events
- 2014Danfoss purchases Vacon
Danfoss acquired Vacon, ending Vacon's existence as an independent listed company and integrating its operations into Danfoss's drives business.
M&A - 2014Barack Obama visits Vacon research facility in North Carolina
On January 15, 2014, U.S. President Barack Obama visited Vacon's research-and-development facility at Research Triangle Park, North Carolina, before speaking to students at North Carolina State University.
Other - Vacon NX drives identified among equipment targeted by Stuxnet
Reporting on the Stuxnet malware identified Vacon NX frequency converters as one of the converter types for which the worm searched for a specific device identifier at Iran's Natanz enrichment facility. The reference describes the equipment targeted by the malware and does not allege wrongdoing by Vacon.
Other
Sources
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