Buying New & Used Electrical Transformers in San Marcos

circuit breaker Electrical Supplies Unlimited buys and sells new power Transformers and more in San Marcos, North San Diego County and surrounding areas including Oceanside, Carlsbad, Vista, Fallbrook and more. Of course, we can arrange shipment on a wide variety of products to service those outside our area. We will also purchase your used Transformers.

Electrical Supplies Unlimited (ESU) isyour go-to destination for comprehensive electrical solutions in San Marcos, San Diego. At ESU, we take pride in being the one-stop shop for electricians, offering a wide range of high-quality electrical supplies, including transformers, circuit breakers, panelboards, fuses, and much more. Whether you're a seasoned professional or a DIY enthusiast, our extensive inventory caters to all your electrical needs. As a trusted supplier, ESU not only buys and sells top-notch electrical components but also ensures a robust stock to meet the demands of electricians in the San Diego area. Count on us for reliable products that empower you to tackle any electrical project with confidence.

Electrical Supplies Unlimited (ESU) is the premier destination for electricians in San Marcos, San Diego, seeking top-quality electrical components. As a comprehensive supplier, ESU specializes in buying, selling, and stocking a diverse range of products, including electrical transformers, circuit breakers, panelboards, fuses, and more. Our commitment to excellence is reflected in our meticulously curated inventory, ensuring that electricians have access to the finest supplies for their projects. Whether you're working on residential, commercial, or industrial electrical installations, ESU is your reliable partner. Trust us to provide the electrical solutions you need, backed by unparalleled expertise and a dedication to meeting the unique demands of the San Diego electrical community.

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 can offer the best pricing on your used and obsolete Electrical Transformers as our large client base allows us to give you the highest price possible.

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.

We purchase most major brands including Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products. We are a fully stocked Electrical Distributor and Electrical Wholesaler with many different lines in stock.

Our inventory consists of a large selection of Circuit Breakers, Transformers, Disconnects, Panelboards to 600v, Fuses up to 3000 Amps, Bolt Switch Pullouts, Motor Starters and Relays, Meter sockets, Lighting ballasts, Metal Halide and Sox bulbs. We also carry Lithonia Commercial and residential lighting fixtures as well.




We are transformer and electrical hardware experts. Do not hesitate to call us at 858.558.2850 to find out how ESU can help you with your excess Transformer needs.

Your one stop go-to guys. Always at your service!