Thomas & Betts
American manufacturer of electrical and communications connectors, cable accessories, and installation components, later incorporated into ABB's installation-products business.
Last updated August 22, 2026
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Overview
Thomas & Betts was an American electrical-components company founded in 1898 by Princeton-trained engineers Robert M. Thomas and Hobart D. Betts. The founders initially established an agency selling conduit to electrical distributors in New York City, at a time when incandescent lighting was beginning to expand and electrical installation products were becoming commercially important. The company subsequently developed into a manufacturer and marketer of products used to connect, protect, organize, and install electrical and communications wiring. Its principal product area was the low-voltage and wiring-infrastructure market. Thomas & Betts supplied connectors, cable accessories, electrical fittings, conduit-related products, and other components used in commercial, industrial, utility, infrastructure, and communications applications. Rather than being primarily a consumer-facing brand, it operated as a business-to-business supplier whose products were distributed through electrical channels and incorporated into larger installation systems. The company is particularly associated with the invention of the cable tie in 1958. The product was developed to make the assembly of wire harnesses more efficient in aircraft. Cable ties later became a widely used method for bundling and securing wires across industrial, commercial, transportation, telecommunications, and general electrical applications. This innovation helped give Thomas & Betts a lasting association with practical wire-management products. In later years, the company broadened its portfolio through acquisitions, including additions in power protection and critical-infrastructure product categories. This expansion supported a strategy of supplying a wider range of electrical installation and protection products rather than concentrating only on connectors or conduit accessories. ABB agreed to acquire Thomas & Betts in 2012 for approximately $3.9 billion, or $72 per share. The transaction was intended to strengthen ABB's position in the North American low-voltage products market and add Thomas & Betts' established distribution relationships and product portfolio to ABB's electrical business. After the acquisition, Thomas & Betts operated within ABB rather than as an independent publicly traded company. ABB later sold the Thomas & Betts HVAC business unit, known as Reznor, to Nortek in March 2014 for $260 million. In 2018, the Thomas & Betts corporate entity was renamed ABB Installation Products Ltd. As a result, Thomas & Betts is best understood historically as a major electrical-components company and subsequently as a legacy product and brand identity within ABB's installation-products operations. The original standalone company is defunct, although products and technologies associated with the business may continue under ABB branding or within ABB product families.
History
Thomas & Betts originated in 1898, when Robert M. Thomas and Hobart D. Betts, two young engineers educated at Princeton University, formed an agency supplying conduit to electrical distributors in New York City. Their business emerged during the early expansion of incandescent electric lighting, when buildings and electrical networks were creating demand for standardized installation materials. The company later moved beyond agency and distribution activities into the design and manufacture of electrical and communications components. Over time, Thomas & Betts became associated with products that helped installers connect, secure, organize, and protect wiring. Its portfolio included connectors, cable accessories, electrical fittings, conduit-related products, and components for electrical and communications systems. The company primarily served professional and industrial markets through electrical distribution channels rather than selling directly as a consumer brand. One of its best-known technical contributions came in 1958, when Thomas & Betts invented the cable tie. The original purpose was to simplify the assembly of wire harnesses in aircraft. The basic fastening concept subsequently became broadly useful in industrial wiring, commercial construction, communications, transportation, and maintenance. Cable ties helped establish a durable connection between the Thomas & Betts name and wire-management solutions. The business later expanded its scope through acquisitions, including brands and product activities connected with power protection and critical infrastructure. This acquisition-led development enabled Thomas & Betts to participate in a broader set of low-voltage and electrical-installation categories. A major turning point occurred in 2012, when ABB acquired Thomas & Betts for approximately $3.9 billion, equivalent to $72 per share. ABB's stated strategic rationale was to become a stronger participant in the North American low-voltage products market. The transaction transferred Thomas & Betts into ABB's ownership and ended its role as an independent company, while giving ABB access to its products, market presence, and distribution relationships. The post-acquisition portfolio was subsequently adjusted. In March 2014, Nortek acquired the Reznor HVAC business unit from ABB for $260 million. Reznor had been part of the Thomas & Betts business acquired by ABB, but the sale separated that HVAC activity from the electrical-installation operations retained by ABB. In 2018, the Thomas & Betts entity was renamed ABB Installation Products Ltd. This change reflected the company's corporate integration into ABB. Thomas & Betts therefore has a dual historical status: it was an independent American electrical-components manufacturer for most of its existence, and it later became a legacy business and brand platform within ABB's installation-products activities. The standalone company is now defunct, although the technologies, product categories, and market capabilities developed under its name remain relevant to ABB's installation-products business.
- 2018
Corporate entity renamed
[1]Thomas & Betts is renamed ABB Installation Products Ltd., completing a further stage of corporate integration.
- 2014
Reznor HVAC unit sold to Nortek
[1]Nortek purchases the Reznor HVAC business from ABB for $260 million.
- 2012
ABB acquires Thomas & Betts
[1]ABB acquires the company for approximately $3.9 billion, or $72 per share, to strengthen its position in North American low-voltage products.
- 1958
Cable tie invented
[1]Thomas & Betts develops the cable tie to improve aircraft wire-harness assembly, creating one of its most recognizable product innovations.
- 1898
Thomas & Betts is founded
[1]Robert M. Thomas and Hobart D. Betts establish an agency supplying conduit to electrical distributors in New York City.
Products and positioning
Industrial electrical and wiring-infrastructure supplier serving electrical distributors, contractors, manufacturers, infrastructure operators, and communications markets.
Cable management · 1958
Cable ties
Thomas & Betts invented the cable tie in 1958 to help assemble wire harnesses in aircraft. The fastening product became useful across electrical installation, industrial production, communications, transportation, and maintenance because it allows groups of wires and cables to be secured quickly and consistently.
Electrical connection components
Electrical connectors
Connectors formed a core part of the company's historical portfolio. These components were designed for joining or terminating conductors in electrical and communications systems and were supplied primarily to professional installation and industrial markets.
Cable management and installation
Cable accessories
The company produced accessories used to organize, secure, terminate, and protect cables. These products complemented connectors and fittings and supported wiring work in commercial, industrial, infrastructure, and communications settings.
Electrical installation hardware
Electrical fittings
Electrical fittings and related installation hardware supported the physical assembly and protection of wiring systems. They were part of Thomas & Betts' broader effort to supply electrical distributors and professional users with components for low-voltage and general electrical installations.
HVAC equipment
Reznor HVAC
Reznor was the HVAC business unit associated with Thomas & Betts and later owned by ABB. ABB sold the unit to Nortek in March 2014, separating it from the electrical-installation activities retained within ABB.
Brand decisions
2018
Thomas & Betts entity renamed ABB Installation Products Ltd.StrategyBackground
ABB continued integrating the acquired company into its own organizational and brand structure.
Action taken
The Thomas & Betts corporate entity was renamed ABB Installation Products Ltd.
Aftermath
The standalone Thomas & Betts corporate identity was replaced by an ABB installation-products identity.
2014
ABB sells Reznor to NortekM&ABackground
After acquiring Thomas & Betts, ABB separated the Reznor HVAC business from its electrical-installation activities.
Action taken
ABB sold the Reznor HVAC business unit to Nortek for $260 million.
Aftermath
Reznor left ABB's portfolio and became part of Nortek, while ABB retained the core electrical-installation business.
Divestiture value. $260 million (March 2014)
2012
ABB acquires Thomas & BettsM&ABackground
ABB sought to increase its presence in the North American low-voltage products market and broaden its electrical-products portfolio.
Action taken
ABB agreed to purchase Thomas & Betts for approximately $3.9 billion, or $72 per share.
Aftermath
Thomas & Betts ceased operating as an independent company and became part of ABB's electrical-products operations.
Acquisition value. $3.9 billion total consideration; $72 per share (2012)
Recent events
- 2018
Thomas & Betts renamed ABB Installation Products Ltd.[1]
Leadership change · Other
ABB renamed the Thomas & Betts corporate entity ABB Installation Products Ltd., formalizing its integration into ABB's installation-products organization.
- 2014
Nortek acquires the Reznor HVAC business from ABB[1]
M&A
Nortek purchased Reznor, the Thomas & Betts HVAC business unit, from ABB for $260 million.
- 2012
ABB agrees to acquire Thomas & Betts[1]
M&A
ABB announced an agreement to acquire Thomas & Betts for approximately $3.9 billion, or $72 per share, in a transaction designed to expand ABB's presence in the North American low-voltage products market.
Sources1 sources
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