ABB has closed its US$3.9bn acquisition of the US electrical-equipment manufacturer Thomas & Betts, the Swiss power and automation corporation announced Wednesday.

The deal widens ABB’s reach in North America, where the size of the market for low-voltage products it can address expands to about $24bn, the company said. ABB’s low-voltage products will now be available through Thomas & Betts’ 6,000 distribution locations and wholesalers in the region.

Both companies are major suppliers of electrical-infrastructure equipment for data centers. Memphis, Tennessee-based Thomas & Betts also sells cabling products into the data center space.

ABB CEO Joe Hogan said the deal made US the company’s largest market, and that the company was a firm believer in the strength of American manufacturing.

“Within the past three years, we have invested over $11bn in North America to become a leading player for power and automation technologies in the region, and today the US is ABB’s largest market in terms of sales and employees,” he said.

ABB expects its post-acquisition annual revenue from the US market to be about $6.6m. Its employee count in the country will now be about 19,000.

Thomas & Betts’ electrical products for data centers include digital static transfer switches, power-distribution gear and uninterruptible power supply (UPS) systems. Its cabling products for the market include connectivity, grounding and wire-management solutions for telecommunications companies.

The US company’s CEO Dominic Pileggi will remain its chairman, while Charles Treadway, who was its COO, will take over CEO duties.

ABB first announced the plans for the all-cash transaction and the acquisition price in January.

Following the deal’s close Thomas & Betts shares have ceased trading on the New York Stock Exchange.