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    Step-Down 3-Phase Transformers

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    What is a step down transformer?

    Step down transformers are essentially buck boost transformers that only buck, and don’t boost. Their purpose is to step down (decrease) the current on the secondary side while the power level remains the same. The wire used on the secondary side should be of a higher gauge than the primary side, as the current on the secondary side will be higher than the primary side.

    These three phase transformers are most commonly used in residential or light industrial and commercial uses to provide safe voltage levels for appliances, power tools, lighting circuits, and more.

    What should I look for in a step down transformer?

    The coils in step down transformers can be made of a variety of materials including aluminum, copper or iron. However, the conductivity of each of these metals varies, resulting in varying levels of efficiency. While all these metals are satisfactory, copper is the most efficient.

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    Harness the power of Bay Power.

    Everything you're looking for in a step-down transformer can be found at Bay Power. Whether you’re looking for a residential transformer or an industrial transformer, Bay Power carries a variety of transformers of different sizes and specifications. Take advantage of our expert customer service and extensive selection, and take your pick from a selection of top transformer manufacturers.

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    Please fill in the following information or contact us at (800) 699-2980 to request a free quote. Our friendly sales staff would be glad to assist you!

    Why Bay Power

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    Sell to Us

    Fill your wallet, not the landfill.

    Have any old or unused Step-Down 3-Phase Transformers lying around? Don’t get rid of them just yet. While we stock a wide range of quality electrical products and solutions, both new and reconditioned, we also buy back your unwanted equipment. So, before deciding what to do with your old Step-Down 3-Phase Transformers and components, have one of our expert technicians take a look to see if we can save a few parts, save the environment, and save you some cash.

    Sell to Us



    Great service shouldn’t end after the purchase. We pride ourselves on the relationships we build with our customer-first mentality and the quality of our Step-Down 3-Phase Transformers and components. That’s why we offer a 1-year replacement warranty on all of our electrical products and solutions from the top manufacturers. Because when you buy with Bay Power, you buy with confidence.

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    Product Condition FAQ

    We are proud to stock a variety of competitively priced, new and reconditioned components from the leading manufacturers of Step-Down 3-Phase Transformers.


    Thanks to our extensive inventory of Step-Down 3-Phase Transformers and components, our resourceful and expertly trained staff will always be able to get the products that you need. Through our extensive network of suppliers, we are able to carry and acquire a huge variety of electrical products and solutions, so chances are if you need it, we can get it.


    Bay Power’s priority is providing you with reliable, high quality electrical hardware. That’s why our mission is to make sure our reconditioned electrical products and solutions function as perfectly as the day they were built. Because while the quality is high, the cost of Step-Down 3-Phase Transformers shouldn’t be.

    New Surplus

    Our selection of new surplus Step-Down 3-Phase Transformers may not arrive brand new in a box, but they function just as well, and have never had electricity run through them. All of the quality, none of the packaging, always with our 1-year replacement warranty.