Toroidal Transformer

Shuogong Power is the best toroidal transformer manufacturer and supplier in China, we have been committed to providing customers with high-quality toroidal transformers with power from 20VA to 3KVA.

Shuogong Power will support your business 100% with strong R&D strength and manufacturing capabilities, and get your toroidal transformer price as soon as possible.

Toroidal Transformer

Toroidal Transformer related products

Toroidal Transformer Manufacturer model

Shuogong Power manufactures toroidal transformers with power from 20VA to 3KVA.

The following are the parameters and specifications corresponding to the toroidal transformer.

If your needs are not met here, please contact us.

Shuogong Power has more than 10 years of rich experience in the field of transformers, we can customize all kinds of transformers you need.

Shuogong step-up/step-down toroidal power transformers meet modern requirements for small size and light weight.

Design power capacity ranges from 20VA to 3kVA, all copper wire design, multiple certifications, covering various international standards.

Our toroidal transformers have single primary voltages of 110V/120V/220V/230V/240V AC 50/60Hz and single or double secondary voltages of 12V/24V/2×24.

Compared to conventional transformers of the same size, the efficiency of the toroidal shape is significantly improved.

Our standard safety toroidal transformers are easy to order and can be customized.

If you can’t find the product you are looking for, or you have special requirements, please feel free to contact us.

PhaseSingle phase
Power20VA to 3KVA
Primary Voltage120V AC (Optional: 110V, 120V, 220V, 230V, 240V)
Secondary Voltage2x24V (24-0-24) AC (Optional: 12V, 24V, 48V, 110V, 220V, 2x6V, 2x12V, 2x15V, 2x24V, 2x30V, 2x35V, 2x40V, 2x50V, can be customized)
Secondary Current4.17A each winding
No. of Inputs1 intput
No. of Outputs

2 inputs, 4-wire (1 output is available)

Note: For the transformer with 2 outputs 4-wire, each output provides the same voltage and current level, the sum of 2 output power capacities is equal to the total capacity.

Winding MaterialCopper Wire
Coil StructureToroidal
No-load Loss<1.08W
Input WireUL1015-18#Red
Output WireUL1015-16#Blue, Black
Voltage StrengthDC2500V
Insulation Impedance≥500MΩ
Cooling MethodNatural air cooling
Warranty12 months
External Diameter90mm
Mounting Hole Distance78*78mm
Package Included1*Toroidal transformer + 1*Accesorries sets (Nut, Shim, Metal disk, Rubber gaske, Pedestal, Screw)



Why Choose Us?

SHUOGONG is the best manufacturer of transformers and voltage regulators in China, you can choose standard transformer products or custom-made transformers and voltage regulators for special voltages.

Best Industry Leaders

A manufacturer of transformers and voltage regulators with 16 years of production experience.

Be your transformer factory

Accept special customization and OEM service.

Professional Certification

Strict quality management, through CE certification.

Best Toroidal Transformer Buying Guide


Toroidal transformers also called toroidal inductor transformers are used in a wide range of electronic circuits: power supplies, inverters and amplifiers, which in turn are used in most electrical equipment: televisions, radios, computers and audio systems.

Best Toroidal Transformer Buying Guide

Shuogong has very rich experience in the field of toroidal transformer manufacturing.

If you want to start a toroidal transformer business, the following can help you.

We introduce you from all areas of toroidal transformer design, manufacture, application and testing.

1. What is a toroidal transformer?

Toroidal transformer is a type of transformer, which is different from ordinary single phase transformer and three phase transformer.

Toroidal transformers are inductors and transformers that use a magnetic core with a toroidal (toroid or donut) shape.

Toroidal Transformer

They are passive electronic components consisting of a torus or toroidal core made of ferromagnetic material such as laminated iron, powdered iron, or ferrite, around which wires are wound.

Toroidal inductors/transformers are more compact than other core shapes because they are made from less material and include a centering washer, nut and bolt, resulting in a 50% reduction in design weight.

2. How does a toroidal transformer work?

The working principle of a toroidal transformer is essentially the same as that of a standard transformer.

The iron core of the toroidal transformer is made of high-quality cold-rolled silicon steel sheet (the thickness of the sheet is generally less than 0.35mm), which is rolled seamlessly, which makes the performance of the iron core better than the traditional laminated iron core.

The coil of the toroidal transformer is evenly wound on the iron core, and the direction of the magnetic field lines generated by the coil almost completely coincides with the magnetic circuit of the iron core. Compared with the laminated type, the excitation energy and iron core loss will be reduced by 25%.

The principle of the toroidal transformer is the same as that of the transformer, both of which work on the basic principles of electro-magnetic and magneto-electric conversion.

The following figure shows the principle of the transformer:

Toroidal Transformer

3. What are the advantages of toroidal transformers?

Both standard transformers and toroidal transformers have their own application scenarios and advantages and disadvantages.

The advantages of toroidal transformers are as follows:

  • Toroidal transformer cores are more compact and they are made from less material.
  • Lighter weight than standard transformers
  • Toroidal transformers have lower secondary impedance and are more efficient, reducing effects such as distortion and fringing.
  • Toroidal transformers radiate less electromagnetic interference (EMI) to adjacent circuits and are ideal for highly concentrated environments.
  • The iron core has no air gap so the vibration noise is smaller.

4. What are the disadvantages of toroidal transformers?

Disadvantages of toroidal transformers are as follows:

The toroidal core transformer has high power conversion efficiency, but the disadvantage is that it is not easy to manufacture.

But when it is used at a lower operating frequency, the advantage of its small size is less obvious.

Because when the toroidal core transformer works at a lower frequency, the cross-section of the toroidal core will be relatively increased.

Which is because the toroidal core is easy to be magnetically saturated when working at a low frequency! It can only be solved by increasing the cross section.

Therefore, only when the toroidal core transformer works at a higher frequency, its small size advantage is revealed! But its high efficiency characteristics will not change.

In addition, the toroidal transformer has high brittleness, low thermal expansion capacity, and is easy to break.

Therefore, it cannot replace ordinary silicon steel sheet transformers in terms of power transformation.

5. Toroidal Transformer Sales Price

If you are looking for toroidal transformer manufacturers or suppliers, then you must be concerned about the toroidal transformer sales price.

Below we have sorted out the prices of toroidal transformers sold on some e-commerce platforms for your reference.

These toroidal transformer prices do not represent the price of toroidal transformers produced by Shuogong.

Shuogong is a leading manufacturer of toroidal transformers, you can contact us for preferential ex-factory prices.

Items Price Primary Voltage (AC)  Secondary Voltage (AC)
50VA toroidal transformer sales price $89.35 120V AC 50/60 Hz 2x24V (24-0-24) or 2x30V (30-0-30)
70VA toroidal transformer sales price $101.47 110V AC 12V or 2x35V (35-0-35 volt)
120VA toroidal transformer sales price $112.36 120V AC 110V to 12V or 230V to 2 x 24V (24-0-24)
150VA toroidal transformer sales price $129.48 120V AC 12V/24V/2x30V
200VA toroidal transformer sales price $138.69 240V AC 24-0-24V
300VA toroidal transformer sales price $147.43 230V AC 12V/24V
350VA toroidal transformer sales price $153.36 220V AC 12V/40-0-40V
500VA toroidal transformer sales price $192.78 230V AC 2x12V/2x24V
600VA toroidal transformer sales price $216.55 240V AC 12V/24V
800VA toroidal transformer sales price $264.47 230V AC 50-0-50V
1KVA toroidal transformer sales price $383.25 240V AC 30-0-30V
2KVA toroidal transformer sales price $686.69 110 AC 12V/30-0-30V
2.5KVA toroidal transformer sales price $784.43 120V AC 12V/40-0-40V
3KVA toroidal transformer sales price $916.54 240V AC 12V/24V

6. What are the manufacturers of toroidal transformers?

China has a very complete industrial chain in the field of toroidal transformers.

There are many manufacturers of toroidal transformers on the market.

There are no toroidal transformer brands that stand out in this area.

Shuogong is a leading manufacturer and supplier of toroidal transformers in China, we are committed to solving any transformer problems for our customers.

If you need a toroidal transformer, no matter what country you are in, we can make it to your 100% satisfaction if you ask.

At the same time, we accept OEM customization and become your exclusive toroidal transformer factory.