circuit breaker

Electricians in downtown San Diego know the value of reliable electrical supplies, and Electrical Supplies Unlimited is their trusted source for high-quality products. Whether you're working on a commercial project or residential job, our company stocks an extensive inventory of both new and used electrical supplies, including power transformers and circuit breakers. With a commitment to supporting the electrician community, we offer not only top-tier products but also unparalleled expertise to assist you in making the right choices. We understand that electrical work demands precision and safety, and that's why we're dedicated to providing the best tools for your job. At Electrical Supplies Unlimited, we are your partners in success, ensuring that you have access to the supplies you need to keep downtown San Diego powered and connected.


Electrical Supplies Unlimited is the go-to destination for electricians and electrician companies in downtown San Diego. Our extensive inventory of electrical supplies, including new and used power transformers and circuit breakers, is tailored to meet the unique needs of electrical professionals. We recognize the importance of having access to reliable and affordable components to complete your projects efficiently. With our commitment to top-notch customer service and quality products, we are your trusted partner in the electrical industry. Electrical Supplies Unlimited is dedicated to ensuring that electricians in downtown San Diego have the support and supplies they need to keep the city running smoothly and safely.

At Electrical Supplies Unlimited, we sell a wide range of Circuit Breakers, Transformers, Fuses, Switches, Plugs and more for San Diego city and surrounding areas including Miramar, Sorrento Valley, Carmel Valley, La Jolla, Del Mar to the north, and UTC, Clairemont, Pacific Beach, Clairemont Mesa, Linda Vista and Mission Bay to the south and many more. Of course, we can arrange shipment on a wide variety of products to service those outside our area.

ESU Inc has been in the electrical supply business for over 30 years. We have a large inventory of electrical supplies both for the commercial and residential markets. We are a fully stocked Electrical Distributor and Electrical Wholesaler with many different lines in stock. We specialize in the hard to find items. 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. Have an emergency? Call our emergency hotline 619-778-1174

We stock most major brands including General Electric, ITE Siemens, Cutler Hammer, Square D, FPE Federal Pacific, Pushmatic, Zinsco, Crouse Hinds, Challenger, Westinghouse, Sylvania, and Bryant.

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.

Our Products ESU sells a large and diverse inventory of Electrical Supplies, Electrical Equipment, including Transformers, Circuit Breakers, Fuses, Panelboard switches, Safety switches, Fuseable switches, Meter Sockets, Motor Controllers, Lighting  Ballasts, Bolt switch and much more. We carrier almost all manufacturers including Zinsco, Pushmatic, FPE Federal Pacific, ITE Siemens,  Cutler Hammer, Lutron, Lithonia,, Square D, Challenger and many more. We serve the San Diego and SD County areas and to many other intra and interstate clients. We sell electrical products to fit any requirement or budget. ESU rents Greenlee Wire Pullers, Conduit benders as well as other electrician tools. Talk directly to one of our specialists, Ed, Scott, Kevin or Chris to find out more. So give us a call today at 858.558.2850 and let us serve you

Circuit Breakers Electrical Supplies Unlimited is your go-to source for Circuit Breaker electrical supplies in San Diego and surrounding areas. We have a large inventory of most brands of circuit breakers. We carry a large variety of manufacturers, including Zinsco, Federal Pacific FPE, Pushmatic, Bulldog, Cutler, Hammer, ITE Siemens, Square D etc. in our San Diego store. We carry most amperages and voltages. Some examples of what we carry:

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

Transformers ESU has decades of experience with buying and selling Electrical Power Transformers. We have a large inventory of most brands of Power Transformers. Single Phasethree phase and more. We carry a large variety of manufacturers and usually stock Acme, Westinghouse, Cutler Hammer, ITE Siemens, FPE  Federal Pacific, Square D, General Electric and Zinsco products.etc. in our San Diego store. Whether you require I phase 3 Phase 208/240, 208 to 240, 208 to 480, 120 to 240 or other voltages we usually have the transformer in stock.

We are circuit breakers and electrical transformer hardware experts. Do not hesitate to call us at 858.558.2850 to find out which Circuit Breaker is right for your requirement.

We also sell hard-to-find refurbished electrical supplies with our guarantee. Call us for specifics!

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