All Categories
History
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 December, 2024: 1.Inglot Electronics Corp., 2.BLOCK, 3.Transformer Manufacturers, Inc..
Table of Contents
Engaged in research on nitride semiconductor growth using the MBE method at Waseda University Graduate School. After graduating from graduate school in 2016, he joined a non-ferrous metal manufacturer.
Engaged in equipment maintenance and engineering work at metal smelting plants. Moved to a chemical manufacturer in 2022. Engaging in similar tasks.
An isolation transformer is a transformer in which the primary and secondary electrical circuits are not connected by conductors.
A transformer is used to change the power supply voltage. In a typical electric circuit, conductors are connected from the power source to the demand equipment. By using an isolation transformer, the conductors of the power source and the demand equipment can be separated.
Most transformers used for power supply are isolation transformers.
Isolation transformers are used in a wide range of applications, from industrial power supplies to household power supplies.
Specific uses of isolation transformers:
As mentioned above, isolation transformers are widely used for power transmission and distribution. They may also be installed for noise rejection and lightning protection.
Isolation transformers are devices that transform and insulate using electromagnetic induction. They consist of primary and secondary windings, an iron core, and a casing.
The primary winding is the winding that receives voltage and power from the power supply. The iron core runs through the center of the winding, and the secondary winding runs through the same iron core. Because of this structure, electromagnetic induction works between the windings, and the voltage corresponding to the number of turns of the primary and secondary windings is supplied to the secondary windings.
The ratio of the number of turns of the primary and secondary windings is called the turn ratio. The more turns of the primary winding, the larger the turn ratio, the larger the turn ratio, the smaller the voltage received by the primary winding. Therefore, more power can be transmitted to the secondary winding.
Common power transformers are isolation transformers, but in rare cases, non-isolation transformers are used. Isolation transformers are transformers in which a portion of the primary winding is used for the secondary winding. Isolation transformers are also called single-winding transformers because of their construction.
Isolation transformers, on the other hand, are called double-wound transformers. Single-winding transformers are less expensive than double-winding transformers because they use less copper wire for the windings. However, since the primary side is not insulated from the secondary side, there is a risk that abnormal voltage on the primary side (e.g., lightning) will spread to the secondary side and destroy demand facilities. Single-winding transformers are used on top of overhead cranes and inside radios to reduce size.
One of the purposes of using isolation transformers is to eliminate noise. However, ordinary isolation transformers can only remove low-frequency noise (common mode noise), not high-frequency noise (normal mode noise). To eliminate normal mode noise, transformers with electrostatic shielding on the primary and secondary windings are available.
As electrical equipment becomes more sophisticated and compact, circuits become closer together, and noise immunity tends to decrease. Noise introduced into electrical and electronic circuits can cause significant damage to system operation. Susceptibility to noise is a drawback of semiconductor components, which are becoming increasingly miniaturized.
Among them, controllers that control systems are less tolerant of noise due to the high integration of chips. If noise gets into such components, it can cause system malfunctions, internal data corruption, and the inability to recover data. Therefore, noise suppression measures such as the use of isolation transformers with electrostatic shielding are essential for semiconductor products.
Although the primary and secondary windings of an isolation transformer are insulated, there is a risk that the windings may become mixed up with each other in the event of an earthquake or other accident. If the windings become mixed up, there is a risk that the voltage on the high-voltage side will spread to the low-voltage side, resulting in an electric shock hazard.
For this reason, transformers of high voltage are required to have one grounding point on the low voltage side. The grounding used in this case is Class B grounding, which is connected to the low-voltage side neutral point of the isolation transformer and the anti-collision plate, etc. Applying Class B grounding to the isolation transformer makes it easier for the leakage detection equipment to detect leakage currents and also reduces the incoming voltage when there is a collision.
*Including some distributors, etc.
Sort by Features
Sort by Area
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., 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., 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. 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, 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 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., 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., 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. 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 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., 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.
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. 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, 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, 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. (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 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 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.
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.
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, 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. 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.
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 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, 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., 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., 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., 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, 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 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., 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. 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.
Ranking as of December 2024
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | BLOCK |
10.5%
|
| 2 | Inglot Electronics Corp. |
8.1%
|
| 3 | Transformer Manufacturers, Inc. |
7.0%
|
| 4 | Controlled Magnetics, Inc |
5.8%
|
| 5 | MPS Industries, Inc. |
4.7%
|
| 6 | Dielectric Sciences, Inc. |
4.7%
|
| 7 | L. A. Woolley Electric, Inc. |
4.7%
|
| 8 | Johnson Electric Coil Company |
3.5%
|
| 9 | Olsun Electrics Corporation |
3.5%
|
| 10 | Jefferson Electric Inc |
3.5%
|
Derivation Method
The ranking is calculated based on the click share within the isolation transformer page as of December 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
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
United States of America
|
18 | 60.0% |
|
India
|
6 | 20.0% |
|
China
|
3 | 10.0% |
|
Japan
|
2 | 6.7% |
|
Switzerland
|
1 | 3.3% |
112 products found - Page 3
112 products - Page 3
Aihara Electric
50+ people viewing
Last viewed: 1 day ago
Very Fast Response
Comes in an indoor case.
Aihara Electric
40+ people viewing
Last viewed: 1 day ago
Very Fast Response
Three-phase transformer for solar power generation systems. Ideal as an insulating lance for grounding the V (S) phase in the power conditioner out...
Aihara Electric
50+ people viewing
Last viewed: 21 hours ago
Very Fast Response
Large size of 6KVA or more with insulated primary and secondary windings.
Aihara Electric
30+ people viewing
Last viewed: 1 day ago
Very Fast Response
Comes in an indoor case.
Aihara Electric
40+ people viewing
Last viewed: 15 hours ago
Very Fast Response
Three-phase transformer for solar power generation systems. Ideal as an insulating lance for grounding the V (S) phase in the power conditioner out...
Sankosha Co., Ltd.
200+ people viewing
Last viewed: 10 hours ago
Standard Response
Lightning-resistant transformers protect equipment from abnormal voltages that occur on communication lines. Insulates the equipment side and exter...
3 models listed
Sankosha Co., Ltd.
150+ people viewing
Last viewed: 25 seconds ago
Standard Response
Isolation transformer for transmission line insulation (CTC line), general use. ■Features ・Since the nameplate is compatible with the mounting di...
3 models listed
Sankosha Co., Ltd.
110+ people viewing
Last viewed: 10 hours ago
Standard Response
■Lightning transformer for AC control Installed at the lead-in point of substation remote monitoring and control equipment, communication disconnec...
Shield Room Co., Ltd.
90+ people viewing
Last viewed: 4 hours ago
Standard Response
An isolation transformer is installed to prevent the activation of safety equipment such as earth leakage breakers on the primary side due to leaka...
3 models listed
Keisei Co., Ltd.
20+ people viewing
Last viewed: 1 day ago
Standard Response
■Applications LAN isolation pulse transformer 10/100BASE IEEE802.3 compliant
SUMIDA
20+ people viewing
Last viewed: 16 hours ago
Sumida offers a wide range of surface mount type gate drive transformers for various types of switching power supplies.
PERITEC INC.
140+ people viewing
Last viewed: 4 hours ago
Verivolt isolation units isolate and protect NI (formerly National Instruments) PXI and cRIO from dangerous surges and high-voltage and high-curren...
5 models listed
Würth Elektronik
20+ people viewing
Last viewed: 11 minutes ago
Standard Response
■Features ・Designed according to EN61558-2-16: Reinforced insulation ・For SMT assembly ■Application ・SMPS with up to 16W power ・Auxiliary powe...
Würth Elektronik
10+ people viewing
Last viewed: 1 day ago
Standard Response
■Features ・Surface mounting ・AEC-Q200 ・Various rotation ratios ・Output voltage is 5V to 23V ・Automobile approved ■Application ・As a gate dri...
Showden Co., Ltd.
640+ people viewing
Last viewed: 4 hours ago
■Shoden's railway protectors protect railway signal equipment from abnormal voltages and currents and support safe operation. Signals are essential...
8 models listed
Pulse Electronics Co., Ltd.
40+ people viewing
Last viewed: 19 hours ago
Medical transformers are for use in hospital beds, etc., and are specialized for safety and security, and can also be used with specifications comp...
