Traction Transformer (Onboard) Market Report 2026

The traction transformer (onboard) market size has grown rapidly in recent years. It will grow from $2.21 billion in 2025 to $2.43 billion in 2026 at a compound annual growth rate (CAGR) of 10.3%. The growth in the historic period can be attributed to growth in railway electrification projects across developed and emerging economies, increasing expansion of metro and high-speed rail infrastructure, rising demand for efficient onboard power distribution systems, government investments in public transportation modernization projects, increasing adoption of electric locomotives and multiple units.

The traction transformer (onboard) market size is expected to see rapid growth in the next few years. It will grow to $3.64 billion by 2030 at a compound annual growth rate (CAGR) of 10.6%. The growth in the forecast period can be attributed to growing investments in sustainable and energy efficient rail transportation systems, rising deployment of smart rail and connected transportation infrastructure, increasing demand for high-speed rail networks worldwide, expansion of urban metro and light rail transit systems, increasing focus on advanced transformer insulation and cooling technologies. Major trends in the forecast period include increasing adoption of compact and lightweight onboard traction transformers for high-speed trains, growing demand for energy efficient traction transformers with reduced power losses, rising integration of advanced cooling systems in onboard traction transformers, expanding use of dry-type traction transformers for enhanced operational safety, increasing deployment of high-capacity traction transformers in metro and subway networks.

The increasing demand for electrification is expected to propel the growth of the traction transformer (onboard) market going forward. Electrification refers to the process of introducing electrical power into a system or technology that previously did not operate using electricity, typically involving the installation of infrastructure such as power lines and electrical equipment to support electricity usage for various applications, including transportation and industrial operations. The growth of electrification is driven by the desire for greater convenience and improved living standards, as it has made homes and industries more efficient, simplified daily life, enhanced safety, and contributed to the overall modernization of society. Traction transformers (onboard) support electrification by enabling electric trains or vehicles to convert high-voltage power supplied through overhead lines or a third rail into the lower voltages required to operate traction motors and onboard systems. For instance, in January 2024, according to a report published by Kelley Blue Book, in 2023, a record 1.2 million vehicle buyers in the United States selected electric vehicles, accounting for 7.6% of the total U. S. vehicle market, compared to 5.9% in 2022. Therefore, the increasing demand for electrification is driving the growth of the traction transformer (onboard) market.

Leading companies operating in the traction transformer (onboard) market are concentrating on advancements such as regenerative braking to recover kinetic energy during train deceleration and convert it back into electrical energy. Regenerative braking refers to a system in electric or hybrid trains in which the kinetic energy of a moving train is transformed into electrical energy during deceleration instead of being dissipated as heat. For instance, in January 2026, Bharat Heavy Electricals Limited, an India-based state-owned engineering and manufacturing company, introduced semi-high-speed underslung onboard traction transformers for Vande Bharat Sleeper trains, a compact and highly efficient train propulsion solution featuring underslung mounting for space optimization, advanced cooling for continuous high-power operation, bidirectional power flow enabling regenerative braking, and a fully indigenous design supporting national initiatives. Additionally, it offers improved operational reliability and simplified maintenance for semi-high-speed train operations.

In April 2024, Bharat Heavy Electricals Limited (BHEL) entered into a strategic partnership with HIMA Middle East FZE to collaborate in the railway signaling business. Through this partnership, Bharat Heavy Electricals Limited aims to expand its presence in advanced railway signalling and safety automation systems by leveraging HIMA’s expertise in safety-related control technologies and integrating it with its existing railway engineering and equipment portfolio to strengthen its offerings in modern railway infrastructure and traction transformers. HIMA Middle East FZE is a Dubai-based company specializing in safety-related automation and control solutions for critical industrial and transportation applications.

Major companies operating in the traction transformer (onboard) market are Hitachi Energy Ltd, Mitsubishi Electric Corporation, Siemens Energy AG, CRRC Corporation Limited, ABB Ltd, Toshiba Corporation, Alstom SA, Fuji Electric Co Ltd, Bharat Heavy Electricals Limited, Meidensha Corporation, Trench Group GmbH, CG Power and Industrial Solutions Limited, Wilson Transformer Company Pty Ltd, JST Transformateurs SA, Zetwerk Manufacturing Businesses Private Limited, Hind Rectifiers Limited, River Engineering Private Limited, International Electric Co Ltd, Medha Servo Drives Private Limited, Škoda Electric a. s.

Asia-Pacific was the largest region in the traction transformer (onboard) market in 2025. Asia-Pacific is expected to be the fastest-growing region in the forecast period. The regions covered in the traction transformer (onboard) market report are Asia-Pacific, South East Asia, Western Europe, Eastern Europe, North America, South America, Middle East and Africa. The countries covered in the traction transformer (onboard) market report are Australia, Brazil, China, France, Germany, India, Indonesia, Japan, Taiwan, Russia, South Korea, UK, USA, Canada, Italy, Spain.

The traction transformer (onboard) market consists of sales of single-phase alternating current traction transformers, rectifiers, and auxiliary transformers. Values in this market are ‘factory gate’ values, that is, the value of goods sold by the manufacturers or creators of the goods, whether to other entities (including downstream manufacturers, wholesalers, distributors, and retailers) or directly to end customers. The value of goods in this market includes related services sold by the creators of the goods.

The market value is defined as the revenues that enterprises gain from the sale of goods and/or services within the specified market and geography through sales, grants, or donations in terms of the currency (in USD unless otherwise specified).

The revenues for a specified geography are consumption values that are revenues generated by organizations in the specified geography within the market, irrespective of where they are produced. It does not include revenues from resales along the supply chain, either further along the supply chain or as part of other products.

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