ESU buys and sells new & used Transformers. 3-Phase 480V Delta - 240V Delta / 120

Electrical Supplies Unlimited buys and sells new Circuit Breakers, Transformers, Fuses, Switches, Plugs and more for San Diego surrounding areas  We will buy your used Transformers.

With over 40 years of experience, ESU has been a cornerstone in supplying electricians and homeowners with top-quality electrical equipment. Our extensive inventory includes new, surplus, and recycled electrical equipment, ensuring that you find the perfect solution for your project needs. Whether you're in search of 3-Phase 480V Delta - 240V Delta / 120 Power Transformers or other electrical components, ESU has you covered. Our commitment to quality and customer satisfaction sets us apart as the go-to destination for reliable electrical supplies in the region. Trust ESU to provide you with the expertise and products you need to get the job done right.


Featured Transformer Specs:



ESU Inc has been in the electrical supply business for over 40 years. We have a large inventory of new, surplus and recycled electrical supplies both for the commercial and residential markets. We are a fully stocked Electrical Distributor and Electrical Wholesaler with many different lines in stock. We specialize in  hard to find items. Our staff is very knowledgeable and our mission is to ensure that our customers expectations are exceeded. Ask around, our reputation is what makes us! Or just call to find out yourself at 858.558.2850.

Electrical Supplies Unlimited (ESU) is the premier destination for electricians and homeowners alike in the San Diego, Orange, and Riverside Counties. Specializing in buying, selling, and stocking new, surplus, and recycled electrical equipment, ESU is your trusted partner for all your electrical needs. Whether you're a professional electrician or a homeowner undertaking a DIY project, ESU offers a comprehensive selection of products, including the highly sought-after 3-Phase 480V Delta - 240V Delta / 120 Power Transformers. With our extensive experience and commitment to excellence, ESU ensures that you have access to top-quality electrical equipment that meets your requirements. Experience the difference with ESU and discover why we've been the preferred choice for electrical supplies for over 40 years.  

We stock most major brands including General Electric, ITE Siemens, Cutler Hammer, Square D, FPE Federal Pacific, Pushmatic, Zinsco, Crouse Hinds, Challenger, Westinghouse, Sylvania, and Bryant.

Featured Transformer Specifications

60 Hz Frequency

150°C Temperature Rise

Primary Adjustment Taps 2 above, 2 below in 2.5% increments

High Efficiency Design

Silicon Steel Core

220°C Insulation Class

Vacuum Pressure Impregnated Windings



This transformer is designed to convert 3-phase 480v to 3-phase 240v to run equipment such as panels, motors, datacenter equipment, and other business machines.