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Control Transformer designs high-performance, fully customized magnetic solutions that are tailored to your power, frequency, and environmental needs.

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Control Transformer has more than 70 years of experience delivering reliable, custom-engineered magnetic solutions across numerous industries.

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Custom Magnetics Designed to Meet Your Precise Technical Needs

Control Transformer, Inc., a ParkOhio company, designs custom magnetic products — including air-cooled and water-cooled transformers, reactors, chokes and inductors — that perfectly fit customers’ complex applications. Our innovative engineered-to-order solutions have the quality to withstand the most rugged environments.

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Premium Custom Magnetics Engineered to Your Specifications

Control Transformer, Inc. (CTI) is a global provider of custom-engineered magnetics trusted to design and manufacture long-lasting products of the highest quality. We manufacture transformers, reactors, inductors and chokes that meet your exact specs.

Meeting the Needs of Many Markets

Since our founding in 1953, we’ve been committed to meeting the diverse needs of OEMs across a wide range of markets. Our engineering team has pioneered many of the industry’s foundational magnetic designs and continues to apply unparalleled technical expertise and innovation to each custom solution.

custom engineered magnetics and transformers

Unequaled Product Quality

The quality of our products is unmatched. From initial concept to delivery, we partner closely with our customers’ engineering teams to provide the right custom magnetics solutions for their needs. Every CTI product is designed with strict attention to detail and undergoes rigorous testing.

We utilize high-quality materials, ensuring magnetics’ reliability in the most rugged conditions.

All products are manufactured utilizing UL Recognized Materials, even when not required.

Products are tested according to IEEE C57 standards.

We carry UL Recognized insulation systems.

Our quality system is ISO-compliant, detailed and documented, ensuring adherence.

We only provide custom magnetic solutions and have vast experience in research and development, new product development, product redesigns and the development of full product lines.

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Uncompromising Quality

No cutting corners, less than 1% failure rate since 2014

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Enduring Reliability

Built for rugged conditions, products last longer than their lifecycle requires

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Tailor-made Innovation

Custom solutions meet or surpass your complex product goals

Custom-Engineered Magnetics Guaranteed to Perform

Our engineered-to-order solutions can meet unique power requirements and dimensions, adapt to rapidly increasing power needs and provide reliability in the most rugged environments.

High-frequency transformers
High-Frequency Magnetics

High-frequency transformers, reactors, chokes and inductors that ensure precise, efficient performance up to 50kHz

Custom Engineered Transformers
Transformers

Air cooled dry auto, dry isolation and Scott-T transformers that offer efficient voltage control and protection, customizable for demanding applications up to 15kV

air cooled reactors
Reactors

Dry-type and water-cooled reactors that ensure efficient current limiting and voltage control, providing reliable performance in high-power systems up to 15kV​​

water-cooled choke
Chokes

Dry-type and water-cooled chokes that provide efficient current limiting and voltage regulation for reliable performance in high-power systems up to 15kV

custom inductors for precise current control
Inductors

Dry-type and water-cooled inductors that offer precise current control and efficient energy storage for reliable performance in high-power systems up to 15kV

custom enclosures to tailor your magnetics for specific applications
Value-Added Products

Custom enclosures, multiple-tap designs, epoxy encapsulated units and more to tailor your magnetics for specific applications

Water cooled transformer

Global Leaders in Custom Magnetics Solutions

CTI was founded in 1953 on the simple principle that we will only build quality products. This philosophy enabled us to grow into a global provider of custom-engineered magnetics and guides our work today.

While we’ve built more than 14,000 individual magnetic specifications to date and are proud to have a long-standing reputation of excellence, our greatest asset is our people. CTI excels because of hardworking people who care that you receive the best magnetics solution for your unique application.

Our numerous long-tenured employees in engineering, sales, purchasing and manufacturing have decades of technical experience. We are ready to apply our expertise, ingenuity and skilled craftsmanship to support your product needs.

14000
+

Individual magnetic specifications built to date

<
1
%

Low failure rate of magnetics built

170

Combined years of experience

Expert Solutions for Your Complex Industry Needs

With over 70 years of experience across markets, we have the expertise and capabilities to meet the diverse technical needs of OEMs across a wide range of industries.

Oil & Gas

Ensure safety and productivity needed for production, refinement and distribution

Aviation

Reliable power for aircraft and ground infrastructure, serving commercial and military markets

Mining

Transformers and reactors to withstand the most rugged underground environments

Induction Heating & Melting

Supply the power and frequency needed for various industrial and domestic heating applications

Renewable / Alternative Energy

Enable conversion, regulation, stability and transfer of power from renewable energy sources

Marine

Reliable transformers for hazardous marine environments, serving commercial and military markets

Electric Vehicles (EV)

Ensure efficiency in power conversion, charging infrastructure and vehicle power systems

Industrial & Manufacturing

Provide efficient power for a wide array of applications, from motors and drives to heavy machinery

Energy Storage

Facilitate the conversion, regulation and management of power in energy storage systems and grids

Find Your Custom Magnetics Solution

Tell us about your magnetics needs. We’ll give you an estimate of the resources needed to engineer a product to meet your exact specs, complete with a preliminary design.