Need a discontinued, obsolete, or hard-to-find circuit breaker? Electrical Supplies Unlimited (ESU) specializes in locating and supplying hard to find circuit breakers in San Diego for residential, commercial, and industrial electrical systems. With over 40 years of experience and an extensive inventory of new, used, surplus, and obsolete electrical equipment, we help electricians, contractors, facility managers, and property owners find replacement breakers that many suppliers can no longer source.
Whether you need a replacement breaker for an older panel, a discontinued manufacturer, or a specialized industrial application, ESU is one of San Diego's trusted sources for difficult-to-find electrical components.
Why Are Some Circuit Breakers Difficult to Find?Many electrical panels remain in service for decades after manufacturers discontinue production. As equipment ages, replacement breakers become increasingly difficult to locate through traditional electrical distributors.
Common reasons circuit breakers become hard to find include:
Fortunately, ESU maintains inventory and supplier relationships that allow us to locate many discontinued and hard-to-find breaker models.
We frequently help customers locate replacement breakers for older and discontinued systems, including:
Our inventory changes regularly, so if you cannot locate a breaker elsewhere, contact our team for assistance.
Many older homes and commercial buildings throughout San Diego still contain electrical panels that require obsolete circuit breakers. Rather than replacing an entire electrical panel, many property owners choose to source compatible replacement breakers when repairs or maintenance are required.
Learn more in our guide on Obsolete Circuit Breakers.
Commercial and industrial facilities often utilize specialty circuit breakers that are not commonly stocked by local suppliers. ESU can assist with locating:
We understand the urgency of keeping electrical systems operational and work to locate replacement equipment as quickly as possible.
If you are searching for a replacement breaker, you may already be experiencing signs of breaker failure.
Learn more in our resources:
Electrical contractors throughout San Diego rely on ESU because we offer:
Our team understands electrical equipment and can often help identify compatible replacements even when model numbers are difficult to read or no longer available.
Electrical Supplies Unlimited proudly serves electricians, contractors, property managers, facilities maintenance teams, and homeowners throughout San Diego County. We maintain one of the area's most diverse inventories of circuit breakers and electrical equipment.
If you're searching for a hard-to-find breaker, obsolete breaker, discontinued breaker, or replacement electrical component, contact ESU today. Chances are we either have it in stock or can help locate it.
Circuit Breakers Mira Mesa San DiegoElectrical Supplies Unlimited (ESU) is your trusted source for Circuit Breakers in Del Mar San Diego, serving contractors, electricians, property managers, and homeowners throughout Bay Ho and surrounding communities including La Jolla, Sorento Valley, Hillcrest, Golden Hill, Bankers Hill, and greater San Diego County.
We buy and sell both new and used circuit breakers, electrical panels, transformers, and electrical equipment. Whether you need replacement breakers, obsolete breakers, or hard-to-find electrical components, ESU provides dependable solutions backed by over 40 years of industry experience.
ESU has proudly served the San Diego electrical supply industry for more than four decades. As a fully stocked electrical distributor and wholesaler, we carry a wide range of residential, commercial, and industrial electrical supplies designed to meet virtually any project requirement.
Our experienced team specializes in locating discontinued, surplus, and specialty electrical products, helping customers source reliable solutions quickly and efficiently.
Our extensive inventory includes major circuit breaker manufacturers and trusted industry brands, including:
General Electric (GE), Siemens / ITE, Cutler Hammer, Square D, Federal Pacific (FPE), Pushmatic, Zinsco, Challenger, Bryant, Westinghouse, Sylvania, Crouse Hinds, Bulldog, and many more.
In addition to circuit breakers, ESU stocks a large inventory of:
We also offer Greenlee tool rentals, conduit benders, wire pullers, and additional electrician equipment for contractors throughout San Diego County.
ESU is San Diego’s go-to source for new, used, surplus, and obsolete circuit breakers. We carry a broad range of amperages and voltages for nearly every major electrical system.
Examples of our inventory include:
Whether you need residential breaker replacements, commercial electrical upgrades, or industrial breaker solutions, our knowledgeable staff can help you select the right product for your project.
We proudly provide circuit breakers and electrical supplies throughout:
We also ship many products nationwide for customers outside the San Diego region.
At Electrical Supplies Unlimited, we combine decades of electrical supply expertise with one of the region’s most diverse inventories of circuit breakers and electrical equipment.
Whether you’re replacing outdated breakers, sourcing specialty equipment, or upgrading electrical infrastructure, ESU delivers dependable products, expert guidance, and exceptional customer service.
Call ESU today at 858.558.2850 to speak directly with one of our electrical supply specialists and find the right circuit breaker or electrical solution for your needs.

Electrical Supplies Unlimited buys and sells new & used Circuit Breakers in Nestor San Diego surrounding areas including Chula Vista, Otay Mesa, Bonita, Rancho Del Rey, Terra Nova, Eastlake Greens and many more. Of course, we can arrange shipment on a wide variety of products to service those outside our area. We will also buy your used Transformers.
ESU Inc. has proudly served the electrical supply industry for over 40 years. We offer an extensive selection of new, surplus, and recycled electrical supplies to meet both residential and commercial needs. As a fully stocked electrical distributor and wholesaler, we carry a wide range of product lines and specialize in sourcing hard-to-find items. Our knowledgeable team is dedicated to exceeding customer expectations, and our long-standing reputation speaks for itself. Call us at 858.558.2850 to experience our service firsthand.
Our inventory features products from many leading manufacturers, including General Electric, Hammond Power, ITE Siemens, Cutler Hammer, Square D, FPE Federal Pacific, Pushmatic, Zinsco, Crouse-Hinds, Challenger, Westinghouse, Sylvania, and Bryant.
We stock a broad selection of electrical equipment, 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, and metal halide and SOX bulbs. ESU also carries Lithonia commercial and residential lighting fixtures.
ESU supplies a diverse range of electrical products to fit virtually any application or budget, serving customers throughout San Diego County as well as intra- and interstate clients. In addition, we rent Greenlee wire pullers, conduit benders, and other professional electrician tools. For personalized assistance, speak directly with one of our specialists—Scott, Kevin, or Chris. Call 858.558.2850 today and let ESU serve your electrical supply needs.
Circuit Breakers Electrical Supplies Unlimited sells and buys both new and used Circuit Breakers, serving Circuit Breakers to Nestor, San Diego and nearby areas such as Chula Vista, Bonita, Rancho Del Rey, Terra Nova and more. We can also arrange shipment of many products to serve customers outside the region. In addition, we will purchase your used Transformers, Breakers, Panels and most Electrical Supplies.
We handle most of the major brands, including Westinghouse, Acme, Cutler Hammer, ITE Siemens, Federal Pacific (FPE), Square D, General Electric, and Zinsco. As a fully stocked Electrical Distributor and Wholesaler, we keep many different product lines readily available.
Electrical Supplies Unlimited is San Diego’s go-to source for Circuit Breaker electrical supplies. Our inventory includes a wide range of circuit breakers across most voltages and amperages. In our San Diego store, we carry products from many manufacturers such as Zinsco, Federal Pacific (FPE), Pushmatic, Bulldog, Cutler Hammer, ITE Siemens, Square D, and more. We stock most amperages and voltages. Some examples of what we offer:
20 Amp thru 125 amp Zinsco breakers
20 amp through 1200 amp 480 volt Siemens breakers 3 phase and single phase
15 thru 100 amp 120/240 Volt Pushmatic Breakers
15 thru 1200 amp 120/240 and 480V Federal Pacific FPE circuit breakers
We are circuit breakers and electrical hardware experts. Do not hesitate to call us at 858.558.2850 to find out which Circuit Breaker is right for your requirement.
Your one stop go to guys. Always at your service!

Electrical Supplies Unlimited buys and sells new & used Circuit Breakers in Palm City San Diego surrounding areas including Chula Vista, Bonita, Rancho Del Rey, Terra Nova, Eastlake Greens and many more. Of course, we can arrange shipment on a wide variety of products to service those outside our area. We will also buy your used Transformers.
ESU Inc. has proudly served the electrical supply industry for over 40 years. We offer an extensive selection of new, surplus, and recycled electrical supplies to meet both residential and commercial needs. As a fully stocked electrical distributor and wholesaler, we carry a wide range of product lines and specialize in sourcing hard-to-find items. Our knowledgeable team is dedicated to exceeding customer expectations, and our long-standing reputation speaks for itself. Call us at 858.558.2850 to experience our service firsthand.
Our inventory features products from many leading manufacturers, including General Electric, Hammond Power, ITE Siemens, Cutler Hammer, Square D, FPE Federal Pacific, Pushmatic, Zinsco, Crouse-Hinds, Challenger, Westinghouse, Sylvania, and Bryant.
We stock a broad selection of electrical equipment, 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, and metal halide and SOX bulbs. ESU also carries Lithonia commercial and residential lighting fixtures.
ESU supplies a diverse range of electrical products to fit virtually any application or budget, serving customers throughout San Diego County as well as intra- and interstate clients. In addition, we rent Greenlee wire pullers, conduit benders, and other professional electrician tools. For personalized assistance, speak directly with one of our specialists—Scott, Kevin, or Chris. Call 858.558.2850 today and let ESU serve your electrical supply needs.
Circuit Breakers Electrical Supplies Unlimited sells and buys both new and used Circuit Breakers, serving Circuit Breakers to Palm City, San Diego and nearby areas such as Chula Vista, Bonita, Rancho Del Rey, Terra Nova and more. We can also arrange shipment of many products to serve customers outside the region. In addition, we will purchase your used Transformers, Breakers, Panels and most Electrical Supplies.
We handle most of the major brands, including Westinghouse, Acme, Cutler Hammer, ITE Siemens, Federal Pacific (FPE), Square D, General Electric, and Zinsco. As a fully stocked Electrical Distributor and Wholesaler, we keep many different product lines readily available.
Electrical Supplies Unlimited is San Diego’s go-to source for Circuit Breaker electrical supplies. Our inventory includes a wide range of circuit breakers across most voltages and amperages. In our San Diego store, we carry products from many manufacturers such as Zinsco, Federal Pacific (FPE), Pushmatic, Bulldog, Cutler Hammer, ITE Siemens, Square D, and more. We stock most amperages and voltages. Some examples of what we offer:
20 Amp thru 125 amp Zinsco breakers
20 amp through 1200 amp 480 volt Siemens breakers 3 phase and single phase
15 thru 100 amp 120/240 Volt Pushmatic Breakers
15 thru 1200 amp 120/240 and 480V Federal Pacific FPE circuit breakers
We are circuit breakers and electrical hardware experts. Do not hesitate to call us at 858.558.2850 to find out which Circuit Breaker is right for your requirement.
Your one stop go to guys. Always at your service!
Circuit Breakers Sorrento Valley San Diego – New & Used Breakers, Panels & Electrical SuppliesElectrical Supplies Unlimited (ESU) is a trusted supplier of Circuit Breakers in Sorrento Valley San Diego, serving contractors, electricians, commercial facilities, industrial clients, and homeowners throughout Sorrento Valley, Mira Mesa, Torrey Pines, UTC, La Jolla, and surrounding San Diego communities.
We buy and sell both new and used circuit breakers, electrical panels, transformers, and hard-to-find electrical components. Whether you need replacement breakers, obsolete equipment, or surplus electrical inventory, ESU provides dependable products backed by over 40 years of experience in the San Diego electrical supply industry.
ESU has proudly served San Diego County for more than four decades as a fully stocked electrical distributor and wholesaler. We maintain a large inventory of residential, commercial, and industrial electrical supplies to meet nearly any project size or requirement.
Our experienced team specializes in sourcing discontinued, surplus, and specialty electrical products, helping customers locate difficult-to-find circuit breakers and components quickly.
Our extensive inventory includes leading electrical manufacturers and breaker brands, including:
Siemens / ITE, General Electric (GE), Cutler Hammer, Square D, Federal Pacific (FPE), Pushmatic, Zinsco, Challenger, Bryant, Bulldog, Westinghouse, Sylvania, Crouse Hinds, Hammond Power, and many more.
ESU offers a wide variety of electrical products beyond circuit breakers, including:
We also provide Greenlee tool rentals, conduit benders, wire pullers, and other electrician tools for projects throughout Sorrento Valley and greater San Diego.
ESU is one of San Diego’s premier suppliers of new, used, surplus, and obsolete circuit breakers. Our inventory includes a broad range of amperages, voltages, and breaker types suitable for residential, commercial, and industrial electrical systems.
Sample inventory includes:
Whether you are upgrading office space, replacing outdated industrial components, or sourcing specialty breakers for commercial systems, our team can help identify the right solution.
We proudly serve customers throughout:
We also arrange shipping nationwide for customers outside the San Diego region.
Electrical Supplies Unlimited combines decades of expertise with one of Southern California’s most diverse inventories of circuit breakers, electrical panels, transformers, and electrical equipment.
Whether you need electrical upgrades, breaker replacements, industrial electrical solutions, or hard-to-find surplus products, ESU is your dependable source for circuit breakers in Sorrento Valley San Diego.
Call 858.558.2850 today to speak directly with one of our electrical supply specialists and find the right breaker, panel, or electrical supply solution for your needs.