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Description 8 Manufacturers 64 Products
West Coast Magnetics
Triad Magnetics
S.G. Smallwood Inc.
Promark Electronics, Inc
PREMO S.L.
Magnetic Circuit Elements Inc.
Electronic Craftsmen
Coilcraft Inc.

8 Flyback Transformer Manufacturers in 2025

This section provides an overview for flyback transformers as well as their applications and principles. Also, please take a look at the list of 8 flyback transformer manufacturers and their company rankings. Here are the top-ranked flyback transformer companies as of June, 2025: 1.Promark Electronics, Inc, 2.Magnetic Circuit Elements Inc., 3.S.G. Smallwood Inc..

Table of Contents

What Is a Flyback Transformer?

A flyback transformer is a transformer used in a flyback converter.

It is one of the circuit methods used in isolated switching power supplies such as isolated DC-DC converters and AC-DC converters, and other types include the forward method, LLC resonance method, and push-pull method.

In the flyback method, energy is repeatedly accumulated and released into the transformer during power conversion. Therefore, unlike other types of transformers, flyback transformers must have the characteristics to store large amounts of energy.

Uses of Flyback Transformers

Flyback transformers are used in switching power supply circuits used in a variety of consumer and industrial applications. The power that can be handled by this power supply is only a few tens of watts, making it suitable for relatively low-power applications compared to isolated switching power supplies of other methods.

On the other hand, it features a wide input voltage range. It has the advantage of simple power supply circuit configuration, fewer components, and lower cost. However, the peak current is higher, so care must be taken with specifications when selecting switching elements, rectifier diodes, and other components.

Also, the ripple current is higher than in other methods, so the smoothing capacitor capacity must be larger.

Principle of Flyback Transformers

Flyback transformers are based on the principle of charging when current flows through the primary side of the transformer and discharging through the secondary side of the transformer after the current is interrupted. Due to the principle of operation, it is very important for the transformer to accumulate electromagnetic energy in terms of its characteristics.

A switching element (power transistor, power MOSFET, etc.) is connected to the primary side of the flyback transformer, and a smoothing capacitor is connected to the secondary side through a rectifying diode. The polarity of the windings is reversed so that when an excitation current is applied to the primary side of the transformer, a voltage is generated in the direction that the rectifier diode on the secondary side turns off.

When the switching element is turned on, the excitation current flows in the primary side of the transformer and electromagnetic energy is stored in the transformer. When the switching element is turned off in this state, the excitation current on the primary side is interrupted, the direction of the voltage on the secondary side is reversed, and the electromagnetic energy stored in the transformer is released through the rectifier diode. This is smoothed by a capacitor to output a DC voltage.

The flyback transformer must store a large amount of electromagnetic energy. Transformers intended for energy transmission, like other methods, use core materials with high magnetic permeability to increase the coupling coefficient. However, such materials usually cannot store large amounts of electromagnetic energy. Therefore, in flyback transformers, an air gap is created in a part of the core where the magnetic permeability is low, and energy is stored in this gap.

Other Information on Flyback Transformers

1. Difference Between Flyback and Forward Power Supplies

Flyback power supplies require a relatively large transformer because electromagnetic energy must be stored in the transformer. A minute gap is created in part of the core to lower the magnetic permeability and store electromagnetic energy. On the other hand, forward power supplies do not require such a minute gap because the transformer does not need to accumulate electromagnetic energy, and the transformer can be made smaller.

In addition, flyback power supplies do not require isolation separation of the primary and secondary feedback circuits, making the circuit configuration very simple, whereas forward power supplies require isolation and a voltage feedback circuit from the output.

2. Ferrite Material Used in Flyback Transformers

Flyback transformers are widely used in AC-DC switching power supplies due to their configuration. However, the semiconductor devices for switching and the transformer are the two areas of high loss in AC-DC switching power supplies. During high-speed switching operations, rapid magnetic flux changes occur in the transformer, and if an iron core is used for the transformer core, heat is generated due to eddy current losses, rendering the transformer unusable.

For this reason, flyback transformers for high-frequency AC-DC switching power supplies often use ferrite as their core material. Since the characteristics of ferrite are frequency and temperature dependent, it is important to select a flyback transformer with a core made of ferrite material suitable for the desired operating speed.

List of 8 Flyback Transformer Manufacturers

*Including some distributors, etc.

Sort by Features

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  • Company Size: largest first
  • Year Founded: oldest first
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  • United States of America
  • Canada
  • Spain
    • Promark Electronics, Inc
      • United States of America Address: 829 Phillips Road Suite 400 Victor, New York, United States of America

      Manufacturer Overview

      Promark Electronics, Inc established in Victor, New York in 1987 is a manufacturer of wire harnesses and cable and electromechanical assemblies used in commercial electric vehicles. Their product portfolio includes printed circuit boards, power supplies, magnetics, fabricated sheet metal, and aluminum extrusions that are used in industries such as medical, telecommunication, military, and automotive. The company has ISO certified manufacturing facilities, a customer support center, and a product development center.

    • 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.

    • 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.

    • PREMO S.L.
      • Spain Address: C/ Severo Ochoa 47 PTA, Campanillas, Málaga, Spain

      Manufacturer Overview

      PREMO Group is a magnetics manufacturer founded in 1962 and based in Malaga, Spain. The company develops, manufactures, and sells electronic components. The company operates 3 manufacturing plants in Wuhu City (China),  Tanger (Morocco), and Quang Nam (Vietnam). Also, PREMO operates research and development centers in France, Germany, Korea, Spain, USA, and China.   The main focus of the PREMO Group are products used in IoT, M2M, VR, Connected and Electric Vehicles. Their product list comprises of RFID antennas, Motion Tracking Sensors, and  power transformers.  PREMO also manufactures inductors & chokes, current sensors, EMC filters, and PLC components.

    • S.G. Smallwood Inc.
      • Canada Address: 699 Wabanaki Drive Kitchener, Ontario, Canada

      Manufacturer Overview

      S.G. Smallwood Inc. (SGS) is a Canadian contract manufacturer specializing in custom transformers and related assemblies that was established in Kitchener, Ontario in 1945. The company offers a range of specialized capabilities, including design, engineering, precision linear winding, precision toroidal winding and layer winding services. These are utilized to produce transformers, windings, inductors, and assemblies according to customer specifications. SGS mainly serves clients in the power supply, consumer electronics, audio equipment, and telecommunications sectors.

    • Electronic Craftsmen
      • Canada Address: 73 Schaefer Street Waterloo, Ontario, Canada

      Manufacturer Overview

      Electronic Craftsmen is a Canadian custom manufacturer specializing in inductors and transformers that was originally founded in 1956 as E Craftsmen Corporation. From their 23,000 sq ft facility in Waterloo, Ontario, the company produces various custom magnetics including power, toroidal, and flyback transformers, common and differential mode chokes, and filter inductors. These are used by clients in the renewable energy, aviation, and industrial manufacturing sectors. Electronic Craftsmen has an onsite machine shop from which it provides additional services for customer projects, such as engineering, encapsulation, prototyping, and testing.

    • 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.

    • Magnetic Circuit Elements Inc.

      Manufacturer Overview

      Magnetic Circuit Elements Inc., established in 1984, is a manufacturer and designer of standard transformers, inductors, chokes, and custom parts such as sin-wave inverters, self-supporting coils, and packaging used in electronics, appliances, technology, military, and manufacturing sectors. The company is one mile off Highway 101, the California North-South freeway, and uses technology methods to meet the CSA and UL safety specifications with standard materials. The company is a receiver of Manufacturer of the Year and other quality awards from defense prime contractors.

Flyback Transformer Manufacturer Ranking

*Including some distributors, etc.

Derivation Method

The ranking is calculated based on the click share within the flyback transformer page as of June 2025. 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

  1. PREMO S.L.: 1962 (63 years ago)
  2. S.G. Smallwood Inc.: 1945 (80 years ago)
  3. Coilcraft Inc.: 1945 (80 years ago)

Company with a History

  1. S.G. Smallwood Inc.: 1945 (80 years ago)
  2. Coilcraft Inc.: 1945 (80 years ago)
  3. PREMO S.L.: 1962 (63 years ago)

Flyback Transformer Manufacturers in United States

*Including some distributors, etc.

Global Distribution of Flyback Transformer Manufacturers by Country

*Including some distributors, etc.

Country Number of Companies Share (%)
United States of America United States of America 3 50.0%
Canada Canada 2 33.3%
Spain Spain 1 16.7%

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List of Flyback Transformer Products

64 products found

64 products

Used mainly for switching power supply, high -frequency transformer reactor-Nikko Electric Co., Ltd.

Nikko Electric Co., Ltd.

Used mainly for switching power supply, high -frequency transformer reactor

630+ people viewing

■ Main characteristics -It is a transformer using ferrite core and is mainly used for switching power supply. ・ Insulated type A type to B type is...

3 models listed

-Used mainly for switching power supply, high -frequency transformer reactor
-Used mainly for switching power supply, high -frequency transformer reactor
-Used mainly for switching power supply, high -frequency transformer reactor

Low -frequency transformer, reactor, commercial transformer (EI type)-Nikko Electric Co., Ltd.

Nikko Electric Co., Ltd.

Low -frequency transformer, reactor, commercial transformer (EI type)

970+ people viewing

Last viewed: 1 day ago

It is a transformer for commercial frequency (50/60Hz) using silicon steel plate. We support custom design according to your request. ■ Main use I...

5 models listed

-Low -frequency transformer, reactor, commercial transformer (EI type)
-Low -frequency transformer, reactor, commercial transformer (EI type)
-Low -frequency transformer, reactor, commercial transformer (EI type)
-Low -frequency transformer, reactor, commercial transformer (EI type)
-Low -frequency transformer, reactor, commercial transformer (EI type)

Small power transformer single type-Daibax Co., Ltd.

Daibax Co., Ltd.

Small power transformer single type

250+ people viewing

We thoroughly incorporate the added value of transformers to create custom-made and optimal products that meet every request. A stable product gro...


Small power transformer CT type-Daibax Co., Ltd.

Daibax Co., Ltd.

Small power transformer CT type

220+ people viewing

Last viewed: 1 day ago

We thoroughly incorporate the added value of transformers to create custom-made and optimal products that meet every request. A stable product gro...


High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series-Sanmori Gen Electronics Co., Ltd.

Sanmori Gen Electronics Co., Ltd.

High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series

680+ people viewing

Last viewed: 1 hour ago

■Features ・Compliant with worldwide safety standards and realized miniaturization ・Compatible with automatic winding ・Significantly reduces char...

10 models listed

EO2017 V1-High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series
EO2020 V1-High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series
EO2023 V1-High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series
EO2020 V2-High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series
EO2017 H1-High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series
EO2020 H1-High frequency transformer Switching power supply transformer Pin terminal type Multi-output EO series

Small power transformer PT type-Daibax Co., Ltd.

Daibax Co., Ltd.

Small power transformer PT type

220+ people viewing

Last viewed: 15 hours ago

We thoroughly incorporate the added value of transformers to create custom-made and optimal products that meet every request. A stable product gro...


Transformer for switching power supply Edgewise Type-Pulse Electronics Co., Ltd.

Pulse Electronics Co., Ltd.

Transformer for switching power supply Edgewise Type

320+ people viewing

Last viewed: 12 hours ago

■Coil/choke/transformer using edgewise, flat wire Achieves high performance and miniaturization. By using a ferrite core with excellent frequency c...


High frequency transformer Switching power supply transformer Pin terminal type EQ series-Sanmori Gen Electronics Co., Ltd.

Sanmori Gen Electronics Co., Ltd.

High frequency transformer Switching power supply transformer Pin terminal type EQ series

780+ people viewing

Last viewed: 4 hours ago

We have created a switching power supply transformer that fully demonstrates the low-loss performance that characterizes the PC47 series, has an op...

7 models listed

FLY-26EQV1-001-High frequency transformer Switching power supply transformer Pin terminal type EQ series
FLY-28EQV1-001-High frequency transformer Switching power supply transformer Pin terminal type EQ series
FLY-29EQV1-001-High frequency transformer Switching power supply transformer Pin terminal type EQ series
FLY-32EQV1-001-High frequency transformer Switching power supply transformer Pin terminal type EQ series
FLY-34EQV1-001-High frequency transformer Switching power supply transformer Pin terminal type EQ series
FLY-36EQV1-001-High frequency transformer Switching power supply transformer Pin terminal type EQ series

Small power transformer HPT type-Daibax Co., Ltd.

Daibax Co., Ltd.

Small power transformer HPT type

260+ people viewing

Last viewed: 1 day ago

We thoroughly incorporate the added value of transformers to create custom-made and optimal products that meet every request. A stable product gro...


Single-phase transformer for low frequency power supply, multi-output EI series-Sanmori Gen Electronics Co., Ltd.

Sanmori Gen Electronics Co., Ltd.

Single-phase transformer for low frequency power supply, multi-output EI series

980+ people viewing

Last viewed: 2 hours ago

■Features ・Fully automated production ・Flat design, power 2W~1849W ・High reliability and excellent interference resistance ・Cardboard packaging...

10 models listed

EI30/15.5-Single-phase transformer for low frequency power supply, multi-output EI series
EI35/18-Single-phase transformer for low frequency power supply, multi-output EI series
EI41/20-Single-phase transformer for low frequency power supply, multi-output EI series
EI48/20-Single-phase transformer for low frequency power supply, multi-output EI series
EI57/25-Single-phase transformer for low frequency power supply, multi-output EI series
EI66/32-Single-phase transformer for low frequency power supply, multi-output EI series

Power transformer-Sanyo Electric Industry Co., Ltd.

Sanyo Electric Industry Co., Ltd.

Power transformer

220+ people viewing

Last viewed: 5 hours ago

Converts the voltage of an electric circuit and uses that voltage to operate an electronic circuit


Flyback transformer with reduced inductance tolerance-Musashino Tsuko Co., Ltd.

Musashino Tsuko Co., Ltd.

Flyback transformer with reduced inductance tolerance

170+ people viewing

Last viewed: 1 day ago

We manufacture custom-made transformers and reactors according to the product used, such as small size, large capacity, and special shapes. ■Featu...


Low frequency power transformer thin pin type PLF PLF4808-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer thin pin type PLF PLF4808

180+ people viewing

Last viewed: 4 hours ago

■Features Ideal for thin devices with height restrictions. A built-in thermal fuse type with a height of 21 mm. Ideal for thin devices with height ...


Low frequency power transformer Lead wire pull-out type/P, S separate winding ES-AH ES2815-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer Lead wire pull-out type/P, S separate winding ES-AH ES2815

190+ people viewing

Last viewed: 15 hours ago

■Features ・This is a lead wire pull-out type transformer. ・We will suggest the most suitable shape depending on the application.


Low frequency power transformer Lead wire pull-out type/P, S separate winding ES-AV ES3511-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer Lead wire pull-out type/P, S separate winding ES-AV ES3511

200+ people viewing

Last viewed: 15 hours ago

■Features ・This is a lead wire pull-out type transformer. -Reduced installation area type. ・We will suggest the most suitable shape depending on ...


Low frequency power transformer Impedance matching transformer E1405P-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer Impedance matching transformer E1405P

250+ people viewing

Last viewed: 8 hours ago

■Features This is a transformer that matches and converts the output impedance of the sending circuit and the input impedance of the receiving circ...


Low frequency power transformer Pin type for board mounting PQ-C Frame metal screw fixing type PQ2811C-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer Pin type for board mounting PQ-C Frame metal screw fixing type PQ2811C

210+ people viewing

■Features This is a pin type transformer for board mounting. Frame metal fittings fixed type. By integrating production lines at our overseas facto...


Low frequency power transformer thin pin type PLS PLS3508-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer thin pin type PLS PLS3508

160+ people viewing

Last viewed: 1 day ago

■Features Ideal for thin devices with height restrictions. Achieved a height of 20mm. Ideal for controller units, standby transformers, etc. We wil...


Low frequency power transformer Pin type for board mounting PE Multi-output type PE2811-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer Pin type for board mounting PE Multi-output type PE2811

200+ people viewing

■Features This is a pin type transformer for board mounting. Advantageous for multiple outputs. By integrating production lines at our overseas fac...


Low frequency power transformer Pin type for board mounting PQ-A Frame metal board insertion type PQ2811A-Kami Electronics Industry Co., Ltd.

Kami Electronics Industry Co., Ltd.

Low frequency power transformer Pin type for board mounting PQ-A Frame metal board insertion type PQ2811A

230+ people viewing

■Features This is a pin type transformer for board mounting. Frame metal fitting board insertion type. By integrating production lines at our overs...


Transformer flyback-Takachiho Trading Co., Ltd.

Takachiho Trading Co., Ltd.

Transformer flyback

280+ people viewing

Last viewed: 1 day ago

■Product overview We have a wide range of product lineups, from flyback transformers for built-in camera strobes to forward transformers for extern...


Transformer with evaluation board for AC-DC converter IC (standard transformer) DR-00485B-Sanshin Electric Co., Ltd.

Sanshin Electric Co., Ltd.

Transformer with evaluation board for AC-DC converter IC (standard transformer) DR-00485B

250+ people viewing

Last viewed: 12 hours ago

We provide standard transformers for evaluation boards for Sanken Electric's AC-DC converter ICs.


Custom Finished Magnetic Components Power Magnetics Offline Flyback Transformer MID-OLTI for Texas Instruments-Würth Elektronik

Würth Elektronik

Custom Finished Magnetic Components Power Magnetics Offline Flyback Transformer MID-OLTI for Texas Instruments

190+ people viewing

Last viewed: 1 day ago

■Features ・Universal, US or European offline input voltage ・Small size ・Low leakage inductance ・Multiple output options ■Application ・Industr...


Iron cores, coils, transformers, heat countermeasure materials, various transformers, switching transformers EP-AF-Ozeki Co., Ltd.

Ozeki Co., Ltd.

Iron cores, coils, transformers, heat countermeasure materials, various transformers, switching transformers EP-AF

130+ people viewing

Last viewed: 1 day ago

■Features -A switching power transformer that uses a ferrite core and is compatible with a wide variety of electronic devices. - Compatible with va...


Power Magnetics DC/DC converter transformer Power over Ethernet transformer WE-PoE-Würth Elektronik

Würth Elektronik

Power Magnetics DC/DC converter transformer Power over Ethernet transformer WE-PoE

180+ people viewing

■Features ・Flyback transformer designed for PoE PD -Various output powers and voltages available ■Application ・PoE power device ・IP phone ・WLA...


Iron cores, coils, transformers, heat countermeasure materials, various transformers, switching transformers EE.ER-AF-Ozeki Co., Ltd.

Ozeki Co., Ltd.

Iron cores, coils, transformers, heat countermeasure materials, various transformers, switching transformers EE.ER-AF

130+ people viewing

Last viewed: 10 hours ago

■Features -A switching power transformer that uses a ferrite core and is compatible with a wide variety of electronic devices. - Compatible with va...


Power Magnetics AC/DC Converter Transformer Universal Offline Standard Transformer WE-UOST-Würth Elektronik

Würth Elektronik

Power Magnetics AC/DC Converter Transformer Universal Offline Standard Transformer WE-UOST

170+ people viewing

■Features ・Designed according to EN61558-2-16: Reinforced insulation ・For SMT assembly ■Application ・SMPS with up to 16W power ・Auxiliary powe...


Transformer Switching converter, SMPS transformer-WIN SOURCE ELECTRONICS

WIN SOURCE ELECTRONICS

Transformer Switching converter, SMPS transformer

150+ people viewing

Last viewed: 1 day ago

■Summary Switching converters, SMPS transformers, are essential components of switched mode power supply (SMPS) systems, known for their efficiency...








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