West Coast Magnetics
Triad Magnetics
Transpower Electrical Equipment Co., Ltd.
Transformer Manufacturers, Inc.
Stangenes Industries, Inc.
Solar Biz Inc.
Servomax Limited
Selvon Instruments Pvt. Ltd.
PUI - Projections Unlimited, Inc.
Powerone Micro Systems Pvt.Ltd

33 Isolation Transformer Manufacturers in 2024

This section provides an overview for isolation transformers as well as their applications and principles. Also, please take a look at the list of 33 isolation transformer manufacturers and their company rankings. Here are the top-ranked isolation transformer companies as of May, 2024: 1.Inglot Electronics Corp., 2.BLOCK, 3.Transformer Manufacturers, Inc..

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List of 33 Isolation Transformer Manufacturers

*Including some distributors, etc.

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    • BLOCK
      • United States of America Address: 10632 W. Grand Avenue, Franklin Park, Illinois, United States of America

      Manufacturer Overview

      BLOCK, over its 80-year history, has evolved into a global manufacturer of transformers, power supplies, reactors, and EMI filters. Its aim of controlled, rapid, and precise in-house production ensures the highest quality standards. A pivotal development center, featuring over 80 engineers and technicians, manages an extensive standard product portfolio while facilitating customization and product development. This allows the company to certify and deliver custom-made products within three weeks from its Verden production sites, ensuring quality across all stages of the development and manufacturing process.

    • Transformer Manufacturers, Inc.
      • United States of America Address: 7051 West Wilson Ave., Norridge, Illinois, United States of America

      Manufacturer Overview

      Transformer Manufacturers, Inc., established in 1949, is a manufacturer that has been a preferred source of custom-engineered, superb-quality transformers and magnetic products for over seven decades. It offers an extensive range of products, including power transformers, audio transformers, choke transformers, toroid transformers, and printed-circuit-mounted transformers, with a specialization in small to mid-size magnetics. The company features tailored solutions, transformers and assemblies, cost-effective outsourcing options, competitive lead times, helpful customer service, and punctual deliveries. The company serves a myriad of industries and markets, such as home and commercial applications, audio, computers, lighting, medical and dental, telecommunications, critical power systems, and more.

    • Controlled Magnetics, Inc
      • United States of America Address: 10766 Plaza Drive., Whitmore Lake, Michigan, United States of America

      Manufacturer Overview

      Controlled Magnetics Inc., founded in 1988 with headquarters in the USA, is a manufacturer of transformers and power conversion magnetic products. The company's products include single-phase control transformers, three-phase drive isolation transformers, machine tool control transformers, drive isolation transformers, and AC and DC inductors. Controlled Magnetics’ products are also found in power systems for factories, hospitals, medical facilities, and photovoltaic systems. The company also offers custom transformers for machine tool control, medical, marine, and computer-grade applications, as well as repair and rebuilding services.

    • Custom Coils, Inc.
      • United States of America Address: 4000 Industrial Way, Benicia, California, United States of America

      Manufacturer Overview

      Custom Coils, Inc. was established in 1978 in Benicia, California, USA, as a manufacturer and designer of specialty coils, coil assemblies, solenoids, and electromagnetic devices. The company offers various products, including beam-guiding magnets, coil-wound bobbins, RF match inductors, round aluminum conductors, and self-supporting coils, among others. Coils, inductors, and electromagnets are used in electric motors, actuators, transformers, magnetic devices, and medical systems like linear accelerators for cancer treatment. The products withstand extreme conditions and are vital for imaging, scanning, semiconductor production, and more. The company's services cater to industries including imaging and scanning, medical, military, and aerospace, among others.

    • Jefferson Electric Inc
      • United States of America Address: 200 Newton Bridge Road,Athens, Georgia, United States of America

      Manufacturer Overview

      Jefferson Electric, headquartered in Dyersburg, Tennessee, is a manufacturer and supplier of magnetic products specializing in dry-type low- and medium-voltage transformer solutions. The company’s product portfolio consists of dry-type low- and medium-voltage transformers, including ventilated, encapsulated, and industrial control transformers. Their product range also includes medium voltage transformers and accessories. The company also offers custom solutions with tailored and modified designs to meet the client’s specific requirements. With an ISO-backed quality system, Jefferson Electric serves various industries and applications across North America.

    • AFP Transformers Corp.
      • United States of America Address: 970 New Durham Road, Edison, New Jersey, United States of America

      Manufacturer Overview

      AFP Transformers Corporation was founded in 1992 as a conglomerate of 3 other veteran companies and is headquartered in Edison, New Jersey. The company is a manufacturer of components used by mining, wastewater, semiconductors, public utilities, and other industries. The company’s products include specialty magnets, power quality products, and the company’s namesake, transformers. The company’s transformer lineup covers standard heating and furnace transformers to types of epoxy-cast transformers with both primary and secondary coils cast in a mold under a vacuum, embedding them in epoxy material to protect them from contaminates and damage during power surges.

    • Inglot Electronics Corp.
      • United States of America Address: 4878 N Elston Ave, Chicago, Illinois, United States of America

      Manufacturer Overview

      Inglot Electronics Corp., established in 1964, and headquartered in Chicago, Illinois, is a manufacturer and supplier of miniature toroids and electromagnetic components. They design and produce electromagnetic components such as miniature toroids, switch-mode magnetics, high and low-frequency power chokes, and linear transformers used in power conversion equipment, covering the power conversion spectrum from surface mounts to large isolation transformers. Their services include design engineering, paper section layer winding, and prototype testing. Inglot Electronics Corp. holds ISO 9001 certification, and also provides data reporting and barcoding, upon request.

    • Dielectric Sciences, Inc.
      • United States of America Address: 88 Turnpike Road, Chelmsford, Massachusetts, United States of America

      Manufacturer Overview

      Dielectric Sciences, Inc., established in Chelmsford, Massachusetts in 1970 is a manufacturer of high voltage cable assemblies, connectors, and insulation systems. The company's product portfolio includes Custom-designed cable assemblies capable of handling high voltage requirements for power transmission and distribution, Precision-engineered connectors for secure and efficient electrical connections in high voltage systems, and insulation materials and systems. The company serves industries such as Oil and Gas, Aerospace and Defense, Automotive and Transportation, Construction, and Power Generation.

    • MPS Industries, Inc.
      • United States of America Address: 19210 S. Vermont Avenue, Building D-415, Gardena, California, United States of America

      Manufacturer Overview

      MPS Industries, Inc. is a manufacturer specializing in advanced magnetic components and assemblies. It was established in 2004 and has been producing a wide range of magnetic solutions including transformers, inductors, and magnetic materials. Operating from the United States, the company serves diverse industries such as electronics, automotive, aerospace, and renewable energy. The company's products play a crucial role in power management, signal integrity, and electromagnetic interference suppression. Other portfolios include Common Mode Chokes, Telecom Magnetics, and Custom Designed Magnetics.

    • Pacific Transformer
      • United States of America Address: 5399 East Hunter Avenue, Anaheim, California, United States of America

      Manufacturer Overview

      Pacific Transformer is a manufacturer and supplier of custom transformers and inductors. Based in California, USA, they are designing and manufacturing power transformers, isolation transformers, autotransformers, and other magnetic components for various industries. Established in 1981, they offer a wide range of products designed for applications such as power distribution, renewable energy, industrial automation, medical equipment, and more. One of their products is Inductors and Chokes, used for energy storage, filtering, and inductive load applications. They are commonly found in power supplies, audio systems, and electronic circuits.

    • Lenco Electronics, Inc.
      • United States of America Address: 1330 S. Belden St., McHenry, Illinois, United States of America

      Manufacturer Overview

      Lenco Electronics, Inc., Since 1973, is a manufacturer custom inductors and transformers such as PCB transformers, constant voltage, autotransformers, and custom transformers. The company also provides NEMA 1 enclosures with removable panels and knockout holes to make electrical connections simple. The McHenry, Illinois-based company services the power production and distribution, electronics, telecommunications, automotive, and electronics industries, and it is a member of the Transformer Association. The business's impregnation area is equipped with three walk-in ovens for the labor-intensive curing process as well as impregnation tanks for vacuum Epoxy and varnish.

    • Triad Magnetics
      • United States of America Address: 460 Harley Knox Blvd. Perris, California, United States of America

      Manufacturer Overview

      Tried Magnetics was founded in the 1940s and is based in Perris, California. The ISO 9001:2015-certified company serves industrial equipment, renewable energy, medical equipment, and other industries as a manufacturer of components using standard and custom magnetic components including transformers, power supplies, and inductors. The company’s custom magnetics division encompasses power and audio transformers, chokes, and power supplies used across industries. The company’s engineering development kits and design sample kits include a sampling of power ranges, sizes, and packaging styles within specific product lines to assist customers in choosing final designs for prototyping.

    • Stangenes Industries, Inc.
      • United States of America Address: 1052 East Meadow Circle, Palo Alto, California, United States of America

      Manufacturer Overview

      Stangenes Industries, Inc. started in 1974 and is headquartered in Palo Alto, California. The company is a manufacturer of magnetic cores and transformers used in the medical and research industries and various military applications. Customers include the United States Department of Energy as well as research facilities such as CERN and DESY in Europe and KEK in Japan. Transformers are the company’s primary product including pulse, isolation, current, and general transformers. The company also produces electromagnets, pulse modulators, power supplies, and magnetic cores.

    • Johnson Electric Coil Company
      • United States of America Address: 821 Watson St, Antigo, Wisconsin, United States of America

      Company Overview

      Johnson Electric Coil Company, a company established in 1934, based in Antigo, Wisconsin, USA, is a manufacturer and distributor of custom transformers and conductors. The company provides quality power and distribution transformers for various industrial applications such as oil and gas, power plants, chemical, nuclear, and biopharmaceutical. It has a range of products such as cast coil, core and coil, encapsulated, pad mounted, drive isolation, grounding, harmonic mitigation, k-rated, marine duty, multi-pulse, noise attenuation, step up, test, and triplex transformers.

    • Olsun Electrics Corporation
      • United States of America Address: 10901 Commercial Street, Richmond, Illinois, United States of America

      Company Overview

      Olsun Electrics Corporation, a company established in 1950, based in Richmond, Illinois, USA, is a manufacturer and supplier of dry type transformers and process control systems. The company provides quality power and distribution transformers for various industrial applications such as oil and gas, power plants, chemical, nuclear, and biopharmaceutical. It has a range of products such as cast coil, core and coil, encapsulated, pad mounted, drive isolation, grounding, harmonic mitigation, k-rated, marine duty, multi-pulse, noise attenuation, step up, test, and triplex transformers. The company is known for its design flexibility and modernization in the transformer manufacturing.

    • L. A. Woolley Electric, Inc.
      • United States of America Address: 620 Tifft St., Buffalo, New York, United States of America

      Company Overview

      L.A. Woolley Electric, Inc. (L.A. Woolley) was founded in Buffalo, New York in 1916 as a supply distributor to serve the industrial and commercial marketplace. The company offers products from such manufacturers as Acme, Mersen, Pass & Seymor, and Wago. The company specializes in control and panel board products, transformers, terminal blocks, wiring accessories, as well as hazardous location products. The company's in-house sales team also support customers in selecting, ordering, and receiving the correct order.

    • Coilcraft Inc.
      • United States of America Address: 1102 Silver Lake Road, Cary, Illinois, United States of America

      Company Overview

      Coilcraft was founded in 1945 and is headquartered in Cary, Illinois. The company is a designer, manufacturer, and distributor of high-performance magnetic components for industries including automotive and computing. The company’s standard products include power devices such as inductors, RF devices, transformers, and EMI components. The company’s automotive division offers transformers, inductors, chokes, and filters operation down to -40 degrees. The company also offers design tools to help customers understand the correct product for their needs and optimum system operational parameters.

    • Dietz Electric Co., Inc.
      • United States of America Address: 4329 W Lincoln Ave, Milwaukee, Wisconsin, United States of America

      Distributor Overview

      Dietz Electric was founded in 1974 and is based in Milwaukee, Wisconsin. Dietz Electric is a broad-line stocking distributor offering electric motors, drives, and power transmission products. Dietz Electric also offers customization options to test, manufacture, modify, and repair all product offerings. Product offerings include electric motors, hazardous locations motors, custom electric motors, variable frequency drives, motor controls, power transmission solutions, and specialty items such as purge systems, Uras vibrators, disc brakes, transformers, and AC line reactors.

      • Japan Address: 4-8-7 Nagajigongencho, Okaya, Nagano, Japan

      Manufacturer Overview

      Toyogiken Co. Ltd (TOGI) is a manufacturer in electrical machinery and accessories. They design, develop and sell terminal blocks, transformers, cables, box terminals, PC board terminals and related accessories. TOGI headquartered in Nagano, Japan has set up their global operations in China, Taiwan, Korea, Thailand, Indonesia, Malaysia and Vietnam. The company is ISO:9001 2015 certified. In addition they are also involved in solar power business operations. TOGI holds 7 patents, 5 trademark patents and 48 utility model patents.


      Manufacturer Overview

      Shareway Technology Co. Ltd is a Chinese manufacturer of power over ethernet (PoE) components that was established in 1997 in Shenzhen, Guangdong. The company’s product lineup includes PoE jacks for data transmission or power supply, PoE transformers for converting input voltages, PoE LAN transformers for isolating data from power signals, and PoE LAN filters for reducing common as well as differential mode noise. The company’s products are used primarily by clients in the power supply, networking, communication, and consumer electronics industries.

    • Powerone Micro Systems Pvt.Ltd
      • India Address: GF-3, KSSIDC Multistoreyed Building, 5th cross, 1st stage, Peenya Industrial Estate, Bangalore, Karnataka, India

      Manufacturer Overview

      PowerOne, an Indian power technology manufacturer, leads the renewable energy sector. Pioneering Solar-on-grid inverters, Solar Hybrid Inverters, and more, it's unmatched in India. Known for quality products with easy installation and long lifespans, the company offers swift customer service. Founded in 1992, it's India's favorite power service provider, from transformers to Solar Power Systems and UPS. Recognized by the Central Government and winning the SD Award for 12 years, it's a power conversion technology pioneer. With a strong exhibition at the Solar Today expo, the company is a force in renewable energy from Bengaluru, India's Silicon Valley.

    • Atandra Energy Pvt. Ltd.
      • India Address: No. 5, Kumaran Street, Pazhvanthangal, Chennai, Tamil Nadu, India

      Manufacturer Overview

      Atandra Energy Pvt. Ltd. is a Chennai-based manufacturer specializing in power & energy management. The company offers solutions to industrial and commercial establishments under the brand name KRYKARD. Its Servo Stabilisers and Transformers have obtained CE certification, affirming compliance with global health, safety, and environmental standards. The company boasts an ISO 9001:2015 certified factory and houses departments for Power Electronics and Electro-magnetics R&D, as well as Software Development for Energy Management Software customization.

      • India Address: Unit No.6, Electronic Sadan, No.1, MIDC, Bhosari, Pune, Maharashtra, India

      Manufacturer Overview

      Volt Control System is a manufacturer specializing in custom winding components and crafting electrical components. Since its establishment in 2006, the company has continuously expanded its product range to cater to various industries, offering tailored solutions and quality services. The company's products address complex challenges in aviation, machine tools, food, automotive, oil and gas, chemical, pharmaceutical, textile, defense, and research industries. Its aim for quality control, from raw materials to finished products, combined with customer-centric after-sales services, has enabled it to achieve its current milestone.

    • Servomax Limited
      • India Address: Plot No: 1269, Fourth Floor, Road Number 36, Jubilee Hills, Hyderabad, Telangana, India

      Manufacturer Overview

      SERVOMAX LIMITED is a manufacturer operating across the air, water, and power sectors. It offers solutions for clean air and water, including air sanitizers, air sterilizers, and water purifiers. The company specializes in manufacturing power-conditioning products like transformers, stabilizers, control panels, and UPS systems. Based in Hyderabad, it serves clients nationally and internationally under the 'SERVOCARE' brand. Known for cost-effective, standard, eco-friendly practices, and efficient solutions prioritizing health, safety, and environmental protection, the company has established itsef as a distinguished player in India's air, water, and power-related product manufacturing.

    • EVR power
      • India Address: Plot.No.64, Ponni Amman Nagar, Ayanambakkam, Chennai, Tamil Nadu, India

      Manufacturer Overview

      EVR Power, established in 1998 and based in Tamil Nadu, India, is an ISO 9001:2015 certified manufacturer of transformers, power supplies, and cooling panels. The company offers a wide range of products, including electroplating rectifiers, auto-transformers, DC/AC Inverters, DC/DC converters and phase shifting transformer which are essential component that balances the fluctuating power supply of volatile energy sources such as wind and solar. EVR Power also offers various services, including testing, installation, and commissioning of various transformers.

    • Selvon Instruments Pvt. Ltd.
      • India Address: C-48, Sector - 63, Electronic City, Noida, Uttar Pradesh, India

      Manufacturer Overview

      Selvon Instruments Pvt. Ltd., is an Indian manufacturer in the Power Line/Power Conditioning sector. With a team of experienced entrepreneurs, the company delivers quality machines for clean power to industries, corporate houses, and MNCs. Leveraging over 35 years of service, the company excels in manufacturing servo-controlled automatic voltage stabilizers and related products. Its steadfast aim for ensuring customer satisfaction, strict adherence to product quality standards, and efficient after-sales service have cultivated strong client relationships. Upholding principles of continuous improvement and timely deliveries has been integral since its establishment in 1986.

    • Jansum Electronics Dongguan Co., Ltd
      • China Address: Xiaxin Road, Sukeng Village, Changping Town, Dongguan City, Guangdong, China

      Manufacturer Overview

      Jansum Electronics Dongguan Co. Ltd., located in Changping Town, Dongguan City, is a manufacturer specializing in R&D and production of various magnetic components, catering to diverse industries and the global market. The company offes a wide range of products, including ethernet transformers, telecom transformers, inductors, power transformers, solar inverter inductors, and more. These products find various applications in routers, medical devices, smart meter applications, security equipments, among other electronic equipments that require magnetic components.

    • Transpower Electrical Equipment Co., Ltd.
      • China Address: No. 114, Xianhe West Road, Jiangshan, Zhejiang, China

      Manufacturer Overview

      Transpower Electrical Equipment Co., Ltd., established in 2006, is a electrical equipment manufacturer and engineering firm. It specializes in transformer production and serves as a solution provider for the metallurgy industry, and supplies power substation equipment. The company operates its own transformer manufacturing bases in Eastern China, producing a diverse range of transformers. The company's products are known in over 48 countries and regions, and its market continues to grow. It has also expanded its portfolio to include power transmission lines and substation equipment, offering steel towers, substation structures, CT, PT, isolating switches, switchgears, and circuit breakers.

    • West Coast Magnetics

      Manufacturer Overview

      West Coast Magnetics, headquartered in Stockton, California, is a manufacturer of transformers and inductors and was founded in 1974. They produce electronic components including filters, coils, transformers, inductors, and also chokes, which are available in various frequency, power, and voltage ratings, suitable for wireless charging, power filtering, buck-boost, and high ripple applications. West Coast Magnetics is ISO 9001 and ISO 13485 certified, ITAR registered, and also complies with RoHS regulations.

    • PUI - Projections Unlimited, Inc.

      Company Overview

      PUI is headquartered in Irvine, California. The company is an authorized distributor selling electronic components from manufacturers with a reputation for high quality and dedication to customer service. The company’s 5 primary product segments include fans, audio devices, capacitors, connectors, and power supplies. The company also offers other products such as fuses, cables, and other subcomponents. The company provides services including bonded inventory, EDI, and barcoding to insure ease of receiving and inventory management.

    • Hitachi Energy Ltd.
      • Switzerland Address: Affolternstrasse 44 8050 Zürich, Switzerland

      Distributor Overview

      Hitachi Energy Ltd., established in 2018, based in Zurich, Switzerland, is a global technology supplier that is advancing a sustainable energy future. The company manufactures and supplies a comprehensive range of capacitors and filter solutions that improves the power quality of electrical networks. They serve customers in the utility, industry and infrastructure sectors with solutions and services across the chain. The company has a proven track record and unparalleled installed base in more than 140 countries. They employ around 38,000 people in 90 countries.

    • Solar Biz Inc.

      Distributor Overview

      Solar Biz Inc. began in the 1970s in Ft. Atkinson, Wisconson. Solar Biz offers complete solar panel systems for residential and commercial customers ranging from under 5 watts to over 400 watts. Systems include solar panel components with racking and mounting, inverters, power centers, solar charge controllers, batteries, and accessories, AC and DC enclosures, circuit protection, hydro and wind generators and accessories, water pumps and water filtering, tanks, heaters, hot tubs, rain catchments, and appliances such as fans, gas ranges, refrigerators and freezers.

Isolation Transformer Manufacturer Ranking

*Including some distributors, etc.

Derivation Method

The ranking is calculated based on the click share within the isolation transformer page as of May 2024. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.

Number of Employees

  1. TOYOGIKEN CO.,LTD.: 238
  2. Nikko Electric Co., Ltd.: 98

Newly Established Company

  1. Jansum Electronics Dongguan Co., Ltd: 2007 (17 years ago)
  2. Shareway Technology Co., LTD,: 1997 (27 years ago)
  3. Selvon Instruments Pvt. Ltd.: 1993 (31 years ago)

Company with a History

  1. L. A. Woolley Electric, Inc.: 1916 (108 years ago)
  2. Johnson Electric Coil Company: 1934 (90 years ago)
  3. BLOCK: 1939 (85 years ago)

Isolation Transformer Manufacturers in United States

*Including some distributors, etc.

Global Distribution of Isolation Transformer Manufacturers by Country

*Including some distributors, etc.

Country Number of Companies Share (%)
United States of America United States of America 18 60.0%
India India 6 20.0%
China China 3 10.0%
Japan Japan 2 6.7%
Switzerland Switzerland 1 3.3%

List of Isolation Transformer Products

18 products are listed.

Nikko Electric Co., Ltd.

Achieving high insulation performance NCW transformer horizontal type series

10+ people viewing

Made under the idea of ​​"wrapping iron in coil", energy saving, small, lightweight and thin, high characteristics, cost performance. High quality ...

8 models listed

Nikko Electric Co., Ltd.

Achieving high insulating performance NCW transformer vertical type series

Made under the idea of ​​"wrapping iron in coil", energy saving, small, lightweight and thin, high characteristics, cost performance. High quality...

10 models listed

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