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Leading The Way In
Transformer Design And Manufacturing For Over 110 Years

Today, Dongan® combines our 110 year history of specialty transformer manufacturing expertise with a complete catalogue of stock transformers for the distributor, OEM and MRO markets. We are proud of our heritage and look forward to serving our customer base into the new millennium. Our core competency lies in:

  • High quality manufacturer
  • Cost competitive products designed to last
  • Broad product line

The growth we are experiencing is with our OEM customer base because these customers have seen our ability to deliver them the products they want, when they want them. It is not just about designing and making the products, on time delivery is a critical component that we fully understand and do everything in our power to meet. We have a warehouse for local inventory in Europe that takes the long lead times out of the equation.


Discover our locations all over the globe



Our Company History

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1909 - Establishment of Company

The Dongan® Electric Instrument Company was established in Albany, NY as a New York corporation. Initial products included the manufacture of ammeters, toy train transformers and volt for the growing automotive business.

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1936 - Continued success in the transformer industry

The Company was moved to Detroit, Michigan by 1911 and renamed Dongan Electric Manufacturing Company, establishing the Company as a Michigan corporation. The Corporate name was taken from Governor Dongan, the first appointed Colonial governor of the Territory of New York in 1682.

In the ‘30s Dongan achieved one of the first Underwriters Laboratories approval for neon transformers and powered signs across the country including the famed Radio City Music Hall.

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1957 - Pioneer Transformer a subsidiary of Dongan opens

General purpose power distribution transformers, industrial control and other more specialised designs were gradually added to the product line during the ‘40s, and ‘50s. Wartime production included both existing product lines and Department of Defense related parts for gun sights.

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1983 - Launching the new 50 series UL control transformers

With all production moved to Pioneer Ohio Plant, Dongan Introduces the 50 series UL control transformers

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2000 - Dongan begins selling into Asia

Dongan started doing business with several multi-national companies located in China, Singapore, Japan and throughout Asia. At this time, we also began our first factory JV in China. We also developed a new customer in India and started a JV with a company located in that country specifically for that market.

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2010 - Expanding our CE Control Transformer line

We added toroids, SMPS transformers and high frequency coils and chokes to further broaden our product range. Then we added depth to our Class 2 transformers products.

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2014 - Starting a new chapter on the European Continent

Dongan establishes sales office in the Netherlands and launches successfully on the European market. More recent products include reactors, industrial control, Class 2 transformers, toroidal transformers, inverters, K – Rated transformers, transformer lighting disconnects and related products.

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Call +31.548.659.031