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Step Down Transformers

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Step down power transformers are extremely popular with American expatriates who continue using American appliances, such as microwaves or vacuums, after moving to Europe or other foreign countries. However, step down transformers are most widely used in power transmission applications at power-generating stations to raise voltages with a corresponding decrease in current. Read More…

Step Down Transformers Step down transformers have the power to convert higher voltages to lower voltages by means of transferring electrical energy through two coil stages, the second coil stage having fewer coil windings. Power outlet voltages vary depending on geographical location. The two commonly used outlet voltages are 220 volts and 110 volts. This voltage difference is an important consideration for people traveling between countries with different outlet voltage standards.
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Leading Manufacturers

Antigo, WI  |  800-826-9741

We believe in offering the very best to all customers. We offer a full range of transformers, including electric transformers, current, and toroidal transformers.

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Johnson Electric Coil Company $$$

Perris, CA  |  951-277-0757

With more than 500 current transformer manufacturers in the world, Triad Magnetics realizes you have a choice. Why choose Triad? Having served the needs of many industries for more than half a century, Triad believes its experience makes the difference. And if there is one point experience has taught it, it is that it must remain flexible and adaptable to the changing needs of the market.

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Triad Magnetics $$$

Gaobu Town, OVR  |  818-863-9000

22 years in the transformer industry since DELTA Electronics, PROWELL is an EMS provider as well as a leading manufacturer specializing in producing Magnetic LED lighting drivers, power adapters, electric transformers, linear power transformers, toroidal transformers ring core inductors, Experienced in precise die casting mold, plastic injection molding parts and metal sheet stamping in South China , we can cooperate with clients’ engineer to turn design ideas into perfect products. our major marketing is in USA, CANADA and UK.

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Dongguan Winshine Electric Co., Ltd. $$$

McHenry, IL  |  815-344-2900

Lenco Electronics, Inc. specializes in a wide variety of custom electric transformers. Lenco’s success has not come about by accident, but by providing its customers with high-quality products.

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Lenco Electronics, Inc. $$$

Fraser, MI  |  800-229-9410

Osborne is an innovative and hardworking design business based in the Detroit area since 1932. We are a market leader in the design and production of premium quality electromagnetic components. Our designs are found in leading laboratories and mission critical applications. Think of Osborne first when you need superior transformers and inductors. With our experience developing over 10,000 custom designs, we offer the insight to quickly transform your ideas into reality. Osborne is your ideal design partner.

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Osborne Transformer Corporation $$$

Mount Holly, NJ  |  800-856-7699

With over 40 years of experience, we’ve designed and manufactured a wide array of mid- to high-frequency electronic transformers in numerous sizes and shapes. We specialize in toroidal, pot core, e core and bobbin-based transformers, as well as baluns, chokes, bar chokes and more. Plus, our winding specialists can manufacture components that fit into even the smallest spaces.

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Mech-Tronics $$$
placeholder image Johnson Electric Coil Company Triad Magnetics Dongguan Winshine Electric Co., Ltd. Lenco Electronics, Inc. Osborne Transformer Corporation Mech-Tronics

Very high voltages and low currents are used for long-distance transmission lines in order to reduce power losses; as a result, at the receiving end step-down transformers reduce the voltage and increase the current to the lower residential or industrial voltage levels. Materials used to construct the coil windings include copper, special steel alloys, chromium, nickel and aluminum, of which copper windings are the most efficient as well as being a little more costly.

Sizes of step down transformers range from large devices intended for use in electrical power systems, such as power plants, to much smaller units that are used in electronic equipment such as loudspeakers in radios, high fidelity equipment and television sets.

Small Isolation Transformers Step Down Transformers - Johnson Electric Coil Company

A step down transformer is comprised of two sets of coils or windings linked by a magnetic field. The core can be a ferrite compound or a laminated core wound with bare copper or enameled coils. The coils are primary and secondary and function as conductors. Although there is no connection between the two circuits, the coil windings are inductively linked.

The principal function of a step down transformer is to convert high voltage, low current power into low voltage, high current power. The conversion begins when the primary coil receives alternating current, or AC, voltage; this produces a varying magnetic field of voltage surrounding the conductor, and the magnetic field activates the secondary conductor coil. Once the voltage conversion is made, the energy is transferred to the load center and the electrical process continues from there.

The ratio of turns (also known as windings) in the primary coil to the number of turns in the secondary coil determines the magnitude of the voltage; in a step down transformer there will be fewer turns in its secondary coil than the primary. Even though there are fewer turns, the turns in the secondary coil are of a larger gauge wire than used in the primary coil in order to handle the increased current power that has been transferred to the secondary coil.

The voltage ratio between the windings of the primary and the secondary circuit mirrors the ratio of the number of windings. Correctly used, step down transformers can protect against safety hazards such as short-circuiting, blowing equipment or starting fires.

Step Down Transformer Informational Videos