Challenger Breakers in San Diego
ESU Sells New, Used & Recycled Transformers and Electrical Supplies including Challenger Breakers for the San Diego, Orange County, Riverside and LA areas!
With decades of hands-on experience, ESU has become a trusted partner for San Diego electricians and homeowners looking to replace and upgrade circuit breakers quickly and efficiently. Our knowledgeable team specializes in sourcing a wide range of breaker lines and voltages to meet residential, commercial, and industrial needs. We carry top brands including Eaton Breakers, Square D Breakers and Challenger Breakers, ensuring compatibility and reliable performance for every project. Whether you’re replacing a single breaker in a home panel or outfitting a large electrical system, ESU provides the expertise and inventory to get the job done right.contractors get safe, reliable replacements for aging Zinsco panels.
For over 40 years, ESU Inc. has been a leader in the electrical supply industry, providing high-quality products to both commercial and residential customers. As a fully stocked electrical distributor and wholesaler, we maintain an extensive inventory of new, surplus, and recycled electrical supplies—including a strong selection of Challenger Breakers and replacements in San Diego. We specialize in sourcing hard-to-find components, ensuring our customers get the parts they need quickly and efficiently.
Our San Diego location stocks most major brands such as Square D, Siemens, ITE, Cutler Hammer, General Electric, and more. Along with Challenger Breakers, our inventory includes panelboards up to 600V, disconnects, fuses up to 3000 amps, meter sockets, lighting ballasts, and specialty bulbs. With a reputation built on reliability and expertise, ESU, Inc. continues to be San Diego’s go-to electrical distributor and wholesaler for both standard and hard-to-find electrical supplies.
In addition to our extensive inventory, we also buy new and used electrical equipment. Whether you're upgrading, downsizing, or clearing out surplus stock, we’re interested in purchasing equipment from major brands such as SquareD, Siemens, ITE, Cutler Hammer, General Electric, Federal Pacific, Pushmatic, Zinsco, Crouse Hinds, Challenger, Westinghouse, Sylvania, and Bryant. We're especially looking for items like Circuit Breakers, Transformers, Disconnects, Panelboards up to 600V, Fuses up to 3000 Amps, Bolt Switch Pullouts, Meter Sockets, Lighting Ballasts, and specialty bulbs including Metal Halide and Sox. Reach out today to turn your unused inventory into cash.
ESU Inc also rents electrical equipment. Greenlee Wire Pullers, Conduit benders as well as many other electrician tools.
Talk directly to one of our specialists, Ed, Scott, Kevin or Chris at 858.558.2850 for assistance. Have an emergency? Call our emergency hotline 619-540-2952