For more than 40 years, Electrical Supplies Unlimited (ESU) has been a trusted resource for San Diego electricians, contractors, and homeowners seeking reliable electrical supplies, tools, and equipment. From complete panelboards and circuit breakers to fuses, transformers, and temporary power systems, ESU provides the quality products and expertise needed to get the job done right. Whether it’s a large commercial installation or a simple residential repair, customers count on ESU for dependable service every time—making ESU a top choice for Breaker Supplies San Diego.

ESU proudly buys and sells surplus electrical equipment—including used circuit breakers in San Diego—helping customers save money while supporting sustainability through recycling and reuse. Their extensive inventory features transformers, circuit breakers, panelboards, fuses, and more, all fully inspected and ready for installation. With a constantly updated stock of both new and surplus components, ESU ensures that contractors, maintenance teams, and homeowners always have access to hard-to-find electrical supplies when they need them most.

With decades of industry experience, the ESU team understands the challenges faced by local electricians and works closely with every customer to deliver the right solutions quickly and efficiently. Their knowledgeable staff takes pride in offering honest advice, competitive pricing, and responsive service that keeps San Diego’s electrical systems running smoothly. Whether you’re looking to buy or sell surplus electrical supplies, ESU is your go-to source for reliable products, expert support, and the best Breaker Supplies San Diego has to offer.

ESU Inc. maintains a large inventory of new, surplus, and recycled electrical supplies for both commercial and residential markets. Thanks to their broad client base, they offer top pricing on used and obsolete electrical transformers, ensuring customers receive maximum value. Their knowledgeable team is committed to exceeding expectations—ask around, ESU’s reputation speaks for itself. Or call to experience it firsthand at 858.558.2850.

They purchase most major brands, including Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE Federal Pacific, Square D, General Electric, and Zinsco. As a fully stocked electrical distributor and electrical wholesaler, ESU carries a wide variety of products, including circuit breakers, transformers, disconnects, panelboards up to 600V, fuses up to 3000 amps, bolt switch pullouts, motor starters and relays, meter sockets, lighting ballasts, metal halide and SOX bulbs, as well as Lithonia commercial and residential lighting fixtures.

As transformer and electrical hardware experts, ESU is always ready to assist with your excess transformer needs. Do not hesitate to call 858.558.2850 to find out how ESU can help.

Your one-stop source for Breaker Supplies San Diego—always at your service!