- IQS Directory
- Industrial Categories
- Toroidal Transformers
- 6 leading manufacturers
- 23 additional suppliers
- 16 states and provinces
- 17 related categories
- 2 guide sections
Toroidal Transformers Manufacturers and Suppliers

IQS Directory is a top industrial directory listing of leading industrial toroidal transformer manufacturers and suppliers. Access our comprehensive index to review and source toroidal transformer manufacturers with preview ads and detailed product descriptions. These toroidal transformer companies can design, engineer and manufacture toroidal transformers to your specifications and application need. A quick and easy to use request for quote form is provided for you to contact these toroidal transformer manufacturers and suppliers. Each company has detailed profile information, locations, phone number, website links, product videos and product information defined. We are the right resource for your information requirement whether its for a manufacturer of electromagnetic devices, low magnetic field transformers, efficient toroidal transformers.
Suppliers located in CA, IL, OH +13 more states
Leading Toroidal Transformers Manufacturers
Showing all 6
| Placement No. | Manufacturer | Location | Contact | Actions | |
|---|---|---|---|---|---|
| 1 | Triad MagneticsWith more than 500 transformer manufacturers in the world, why choose Triad? We’ve been an industry leader for over 80 years, demonstrating our commitment to quality and reliability as we continue to innovate. With over 1,500 standard off-the-shelf parts and the capability to customize any of our products to meet your specific needs, our engineering team is available to assist you. Contact us today to let us know how we can help with your next project! | Perris, CA | |||
| 2 | V-Tech Manufacturing Solutions, LLCAt V-Tech Manufacturing Solutions, we provide electric transformer solutions designed to support reliable power distribution, voltage regulation, and electrical system performance across a wide range of industrial and commercial applications. Our company focuses on delivering products that meet demanding operational requirements while maintaining quality, consistency, and long-term dependability. | Castle Rock, CO | |||
| 3 | Lenco Electronics, Inc.Established in 1973 manufacturing a wide variety of custom transformers and inductors. Transformer products range from small PC transformers to single-phase units with capacities between 10mW and 25KVA, as well as three-phase transformers from 7VA to 75KVA. With our extensive experience in custom inductors and transformers, Lenco serves as your source for all requirements. We offer affordable samples, as well as design and manufacturing support, whether you need just one unit or thousands. | McHenry, IL | |||
| 4 | Dongan Electric Manufacturing CompanyDongan Electric Manufacturing Company delivers high-quality electric transformers built for industrial, commercial, and OEM applications. With decades of experience, our team engineers reliable and efficient solutions for power distribution and electrical systems. Our extensive product line includes control transformers, industrial control transformers, encapsulated transformers, and custom-designed units, all crafted with precision and durability. | Fraser, MI | |||
| 5 | Sun TransformerAt Sun Transformer, we specialize in the design and manufacture of electric transformers built to support dependable power distribution, voltage regulation, and electrical performance across a wide range of industrial and commercial applications. Our company is focused on delivering transformer solutions that meet demanding operational requirements while maintaining reliability, efficiency, and long-term value. | McLeansboro, IL | |||
| 6 | SNC Manufacturing Company, Inc.At SNC Manufacturing Co., we specialize in the design and production of electric transformers that serve a wide range of industrial and commercial applications. As a team deeply rooted in electrical innovation, we take pride in engineering solutions that deliver consistent performance, exceptional durability, and long-term value. Our capabilities extend from custom transformer manufacturing to OEM solutions, allowing us to meet the unique needs of our customers with precision and reliability. | Oshkosh, WI |
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Leading toroidal transformers manufacturers are listed first on this page, each with a website preview and a Request a Quote button on its row.
Additional Toroidal Transformers Companies
The category’s other toroidal transformers companies are listed on their own page, with location, phone and website where each supplier provides them.
View 23 Additional Toroidal Transformers CompaniesDo not see your company listed in Toroidal Transformers?
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Toroidal Transformers Industrial Manufacturing Guides
Toroidal Transformers: Operating Principles and Advantages
This article offers an in-depth guide to toroidal transformers. Read further to find out more. What is a Toroidal Transformer? Operating Principles of…
6 chapters
Quick Answers
- How many toroidal transformers manufacturers are listed on IQS Directory?
- 6 leading manufacturers and 23 additional suppliers.
- Where are toroidal transformers manufacturers located?
- The listed suppliers are in 16 states and provinces: California (6), Illinois (4), Ohio (3), Colorado (2), Connecticut (2), New Jersey (2), Arizona (1), Florida (1), and 8 more.
- How do I get quotes from toroidal transformers suppliers?
- Select suppliers in the table and choose Request Quotes. IQS reviews your request and forwards it to every supplier you select.
Toroidal Transformers
A toroidal transformer is an electro-magnetic device used to transfer electrical energy away from one electric circuit and toward another without changing its frequency. Toroidal transformers are donut-shaped transformers, which are highly space efficient and excellent for reducing electromagnetic interference. Offering quiet, efficient operation, toroidal transformers have very low stray magnetic fields because they have almost no air gaps.
Purpose of Toroidal Transformers
Toroidal transformers are the smallest-sized transformers in regards to both weight and volume, which works to the advantage of toroidal transformer manufacturers because they can be easily incorporated into any power source application that can accommodate its shape. Industries that benefit from toroid transformers include electronics, aerospace, musical instruments, private security, meteorology and transportation and many more. Used as transformers in main power supplies, additional applications for toroid power transformers include audio amplifiers, battery chargers, induction loop equipment, household appliances, motor drives, cranes, lighting and medical devices. Toroidal transformers are also used as inductors in low frequency transmitters and receivers.
Design of Toroidal Transformers
The central part of a toroidal transformer is its donut-shaped core. The core is constructed from grain-oriented silicon-iron or permalloy, which is slit to form a steel strip. The steel strip is then wound into a coil, made from powdered iron. The construction of the strip ensures that all of the molecules are aligned with the direction of flux, or the rate of flow of energy across a given surface, and increases the capacity for magnetic induction. Since the core is closed and ring-shaped, air gaps are eliminated that are inherent in other cores. The cross-section of the core is typically either square or rectangular but can also be cylindrical in pricier cores. The primary and secondary coils are wound in a densely concentrated manner to ensure that the entirety of the core's surface is covered. The two coils are linked by a magnetic field and act as conductors.
When the primary coil receives AC voltage, this produces a varying magnetic field of voltage surrounding the conductor; the magnetic field activates the secondary conductor coil. This results in the toroid transformers changing the voltage and transferring electrical energy, ideally with the least amount of energy loss. The design of toroid transformers prevents energy loss by confining the magnetic flux in the core. There are two directions of fluxes in the toroid magnetic field. Poloidal flux threads the hole in the center of the torus, and toroidal flux is parallel to the core of the torus.

