Circuit Breakers Linda Vista San Diego – New & Used Breakers, Panels & Electrical Supplies

Electrical Supplies Unlimited (ESU) is your dependable source for Circuit Breakers in Linda Vista San Diego, serving electricians, contractors, businesses, and homeowners throughout Linda Vista, Mission Valley, Kearny Mesa, Clairemont, Serra Mesa, and surrounding San Diego communities.

We specialize in buying and selling new, used, surplus, and obsolete circuit breakers, electrical panels, transformers, and hard-to-find electrical components. Whether you need replacement breakers for residential repairs or industrial-grade electrical equipment, ESU offers over 40 years of trusted electrical supply experience.

Trusted San Diego Circuit Breaker Supplier for Over 40 Years

ESU has proudly served the San Diego electrical supply industry since 1985. As a fully stocked electrical distributor and wholesaler, we maintain an extensive inventory of circuit breakers and electrical supplies for residential, commercial, and industrial applications.

Our knowledgeable team specializes in locating difficult-to-find and discontinued products, helping customers throughout Linda Vista and San Diego source dependable electrical solutions quickly.

Major Circuit Breaker Brands Available

We stock products from most leading electrical manufacturers, 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.

Complete Electrical Supply Inventory

In addition to circuit breakers, our inventory includes:

• Transformers
• Panelboards up to 600V
• Disconnects & Safety Switches
• Fuses up to 3000 Amps
• Meter Sockets
• Motor Starters & Relays
• Lighting Ballasts & Fixtures
• Bolt Switch Pullouts
• Commercial and industrial electrical hardware

We also provide Greenlee wire pullers, conduit benders, and electrical contractor tools for local projects throughout San Diego County.

New, Used & Obsolete Circuit Breakers in San Diego

ESU is one of San Diego’s premier suppliers for circuit breakers across most amperages and voltages. We stock:

• 20 Amp to 125 Amp Zinsco breakers
• 15 Amp to 100 Amp Pushmatic breakers
• 20 Amp to 1200 Amp Siemens breakers
• 15 Amp to 1200 Amp Federal Pacific (FPE) breakers
• Single-phase and 3-phase commercial breakers

We also offer specialty solutions including tandem circuit breakers, panel upgrades, and breaker replacement solutions for outdated or discontinued systems.

Serving Linda Vista San Diego & Nearby Communities

We proudly serve customers throughout:

• Linda Vista San Diego
• Mission Valley
• Kearny Mesa
• Clairemont
• Serra Mesa
• Mira Mesa
• San Diego
• Vista
• Oceanside
• All San Diego County

We also ship electrical products nationwide for customers outside Southern California.

Circuit Breaker Resources & Electrical Expertise

Whether you need help selecting the correct breaker, replacing outdated panels, or sourcing commercial electrical equipment, ESU offers trusted expertise and one of the largest inventories in the region.

Helpful resources include:

• How to Choose the Right Circuit Breaker
• When to Upgrade Your Electrical Panel
• Circuit Breaker Panel Upgrade Cost
• Circuit Breaker Resource Hub

Your Linda Vista San Diego Circuit Breaker Experts

Electrical Supplies Unlimited combines deep product knowledge, decades of industry experience, and one of Southern California’s most diverse inventories of circuit breakers and electrical supplies.

Whether you are an electrician, contractor, property manager, or homeowner, ESU is your trusted source for circuit breakers in Linda Vista 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 solution for your project.

Electrical Supplies Unlimited supplies a large stock of  Medium Voltage Circuit Breakers (5-27kV).

Electrical Supplies Unlimited is your trusted source for high-quality medium voltage circuit breakers designed to protect critical electrical systems in commercial, industrial, and utility applications. Medium voltage systems typically operate in the range of 1,000 volts (1kV) up to 35,000 volts (35kV), making these breakers essential for substations, industrial facilities, data centers, and power distribution infrastructure. Our extensive inventory of medium voltage circuit breakers includes proven models from industry-leading manufacturers, ensuring reliable performance, long service life, and compliance with modern electrical standards.

Unlike low-voltage breakers rated at 600 volts and below, medium voltage circuit breakers are engineered to handle higher fault currents and more demanding operating environments. They play a critical role in protecting transformers, switchgear, and distribution equipment by safely interrupting overloads and short circuits before damage occurs. At Electrical Supplies Unlimited, we specialize in supplying dependable medium voltage circuit breakers that balance performance, durability, and cost-effectiveness—helping contractors, engineers, and facility managers maintain safe, efficient, and resilient power systems.

Electrical Supplies Unlimited is also a go-to source for high-quality medium-voltage circuit breakers (5-27kV), offering reliable solutions for industrial, commercial, and utility applications. Our extensive selection of medium-voltage circuit breakers ensures optimal performance, safety, and durability for power distribution systems. Whether you're upgrading an existing system or installing a new one, our expert team is here to guide you toward the best solutions for your electrical needs. With a commitment to superior quality and customer satisfaction, Electrical Supplies Unlimited is the trusted supplier for businesses looking for top-tier circuit breakers in the industry.

One key distinction between medium-voltage and low-voltage circuit breakers is their capacity and application. While low-voltage circuit breakers (typically rated below 1,000V) are designed for residential and commercial electrical panels, medium-voltage circuit breakers (ranging from 5-27kV) are essential for large-scale power distribution, industrial plants, and substations. Medium-voltage breakers are built to handle higher fault currents and provide enhanced arc flash protection, ensuring greater reliability in high-power environments. At Electrical Supplies Unlimited, we provide top-of-the-line medium-voltage circuit breakers tailored to your specific power needs, ensuring efficiency, safety, and long-term durability.

GE
Westinghouse-Cutler-Hammer
Siemens-Allis Chalmers
ABB-BBC-ITE-Gould
Federal Pacific
Square D

We will buy new and used Low & Medium Voltage Breakers

ESU Electrical Supplies Unlimited not only sells top-quality electrical components, but also buys both new and used equipment, including low and medium voltage circuit breakers. Whether you’re upgrading your system or decommissioning old gear, ESU offers a convenient solution by purchasing your surplus breakers and electrical parts. This helps reduce waste and puts valuable equipment back into circulation for future use.

MGM HT500A3B2 Transformer

The MGM HT500A3B2 transformer is a reliable dry type transformer widely used in commercial and industrial electrical distribution systems. Designed for efficient voltage conversion and long service life, this transformer is commonly installed in facilities that require dependable power for lighting, equipment, and building infrastructure.

Electrical Service Upgrade (ESU) specializes in the buying, selling, and stocking of new and used MGM HT500A3B2 transformers. If you are looking to replace a failed transformer, expand your electrical capacity, or source a hard-to-find model, our team can help locate the right equipment quickly and efficiently.

New and Used MGM HT500A3B2 Transformers Available

Many commercial buildings and industrial facilities still operate with existing MGM HT500A3B2 transformers. When these units fail or need replacement, sourcing the correct transformer quickly can be critical to restoring power and minimizing downtime.

Electrical Service Upgrade maintains inventory and supply channels for both new and used MGM transformers, allowing us to provide fast solutions for facility managers, contractors, and property owners.

• New MGM HT500A3B2 transformers
• Quality tested used transformers
• Hard-to-find transformer models
• Emergency replacement units
• Commercial and industrial transformer sourcing

Common Applications for the MGM HT500A3B2 Transformer

The HT500A3B2 transformer is commonly used in a variety of commercial and industrial environments where stable voltage conversion is required.

• Commercial office buildings
• Industrial manufacturing facilities
• Retail centers and shopping plazas
• Warehouses and distribution facilities
• Hospitals, laboratories, and institutional buildings

Dry type transformers such as the MGM HT500A3B2 are often preferred because they require less maintenance and eliminate the risks associated with oil-filled transformers.

Replacing an MGM HT500A3B2 Transformer

If your existing MGM HT500A3B2 transformer is overheating, producing excessive noise, or experiencing voltage irregularities, it may be time for a replacement. Electrical Service Upgrade can help evaluate your electrical system and provide the proper transformer solution for your facility.

Our services include:

• Transformer sourcing and sales
• New and used transformer inventory
• Transformer replacement and installation
• Electrical load evaluation
• Commercial electrical distribution upgrades

Buy or Sell Commercial Transformers

Electrical Service Upgrade not only sells transformers, but we also purchase used commercial transformers. If you have surplus electrical equipment or recently upgraded your facility, our team may be able to purchase your existing units.

Whether you are searching for a new or used MGM HT500A3B2 transformer, or need help sourcing other commercial transformers, ESU provides dependable solutions for contractors, facility managers, and building owners.

Circuit Breakers in Sunnyside, San Diego. ESU buys and sells new & used Breakers and Panels!

Electrical Supplies Unlimited buys and sells new & used Circuit Breakers in Sunnyside  San Diego surrounding areas including Chula Vista, Imperial Beach, 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 Sunnyside, 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!