Electrical Supplies Unlimited (ESU) is the leading source for Cutler Hammer circuit breakers in San Diego, providing electricians and electrical contractors with top-quality electrical supplies for residential, commercial, and industrial projects. Our extensive inventory includes everything from single-pole 15A 120/240V units to three-pole 3000A 600V options in the Cutler Hammer circuit breakers line, ensuring that professionals can always find the right solution for any job. At ESU, we combine a commitment to reliability with exceptional customer service, helping electricians source the right Cutler Hammer circuit breakers and other essential electrical components quickly and efficiently. Whether you’re replacing a panel, upgrading a system, or stocking up for a large project, ESU is your trusted San Diego partner for high-quality electrical supplies that deliver safety, performance, and peace of mind.
Electrical Supplies Unlimited, known as ESU, is your trusted partner for top-quality electrical components in San Diego. With a steadfast commitment to excellence, we cater to the needs of electricians and electrical companies by providing a comprehensive range of electrical supplies, including the highly regarded Cutler Hammer Circuit Breakers. Our inventory is carefully curated to meet the demands of various electrical projects, ensuring that professionals have access to reliable components that ensure safety and performance. At ESU, we understand that the success of electrical projects depends on the quality of the supplies used. That's why we prioritize not only providing products like Cutler Hammer Circuit Breakers but also offering exceptional customer service to assist electricians in finding the right solutions for their specific needs. Whether you're working on residential, commercial, or industrial projects, ESU is your one-stop destination for superior electrical supplies that help you get the job done efficiently and safely. As an established player in the San Diego electrical supplies market, ESU takes pride in being a trusted source for electricians and electrical companies. Our extensive inventory includes a wide range of products, from circuit breakers and wiring devices to lighting solutions and more. Cutler Hammer Circuit Breakers, known for their reliability and performance, are just one example of the top-tier brands we carry. What sets us apart is our unwavering dedication to customer satisfaction. Our experienced team is well-equipped to assist you in selecting the right electrical supplies that align with your project requirements and budget. Whether you're in need of specific components, advice, or assistance in navigating the intricacies of electrical systems, ESU is your go-to partner for excellence in both products and service. Explore our vast selection today and experience the ESU difference – where quality, expertise, and reliability come together to power your electrical projects to success.
Are you an electrician or a homeowner in need of reliable electrical supplies? Look no further than Electrical Supplies Unlimited (ESU). As a trusted provider, ESU offers a wide range of electrical products to meet your needs, including new, surplus, and recycled Cutler Hammer Circuit Breakers. Whether you're working on a residential or commercial project, ESU has you covered with a comprehensive selection of Cutler Hammer Circuit Breakers, ranging from single pole 15A 120/240V to 3 pole 3000Amp 600V options. With ESU's commitment to quality and reliability, you can trust that you're getting top-notch products at competitive prices. Visit ESU today to find the perfect Cutler Hammer Circuit Breakers for your electrical projects.
When it comes to electrical supplies, trust the experts at Electrical Supplies Unlimited (ESU) to meet all your needs. ESU specializes in buying, selling, and stocking Cutler Hammer Circuit Breakers, offering a diverse range of options to suit every project requirement. Whether you're looking for single pole 15A 120/240V breakers or 3 pole 3000Amp 600V models, ESU has the inventory to fulfill your needs. With a focus on quality and customer satisfaction, ESU ensures that you get reliable Cutler Hammer Circuit Breakers at competitive prices. Don't compromise on safety and reliability—choose ESU for all your electrical supply needs and experience unparalleled service and product excellence.
The Cutler Hammer Story
Harry Henderson Cutler and Edward West Hammer incorporate the Cutler-Hammer Manufacturing Co. in 1893, specializing in electric starters, speed regulators and field rheostats. Developed first automatic motor starter patented by Cutler in 1900, laying the foundation for the modern motor control industry, and in 1901 the company designed the control equipment for the Panama Canal. By the 1930s, engineers at Cutler-Hammer had obtained 28 patents for the use of vacuum tubes to control heavy currents. Cutler-Hammer became part of Eaton Corporation in 1978 bringing over $500 million in sales of a complete portfolio of power control and switching devices
ESU will purchase your excess electrical inventory including Cutler Hammer 50A breakers. We buy and sell most circuit breakers, transformers, new and used and fuses.
Electrical Supplies Unlimited is your company's business source for testing, repairing, rebuilding or reconditioning electrical equipment. ESU maintains a wide variety of out of stock circuit breakers, relays, transformers, switches, relays, motor controls, and other electrical equipment.
Featured Breaker: Cutler Hammer 50A Industrial Circuit Breaker
Manufacturer: Cutler Hammer
Industrial Circuit Breaker
50A
600V max 250V c.d. Max
Cat. FD3050L
Suitable for use on
Single Phase AC circuits
We have been in the electrical supply business for over 40 years and offer fair prices for your excess electrical inventory. Call us today to find out more or request a quote here!
If your home was built between 1950 and 1990 and is equipped with a Federal Pacific Electric (FPE) circuit breaker panel with Stab-Lok circuit breakers, you run a significant risk of breaker malfunction and fire.
The breakers inside the panel are designed to guard your home against serious electrical problems by preventing circuit overload, short circuits and outside power surges coming into the panel. When an overload occurs, a breaker protects you by tripping, thus shutting down the power to the circuit. However, if a breaker is defective or not operating properly, the risk of fire to the panel and consequently to your home becomes imminent.
Why are Federal Pacific breaker boxes dangerous?
Multiple tests done on the breakers since the 1980s have proven that one in four Stab-Lok breakers are defective and will not properly trip off. Unfortunately, when the testing began in the early 1980s, a New Jersey court later ruled that FPE committed testing fraud and a cover-up, labeling the breakers as meeting the standards set by the UL when in reality, they were defective.
In 1983, the Consumer Product Safety Commission closed its two-year investigation and felt it impossible to create a product recall at the time because of budget issues, even as Federal Pacific panels and breakers continued to be installed in millions of homes that to this day still run the risk of an electrical fire. An estimated 2,800 fires each year directly result from Federal Pacific panel breaker malfunction. Federal Pacific Electric has been out of business for many years, but the danger and damage caused by their negligence continues.
Do you have a Federal Pacific panel?
If you own a home between 25 and 65 years old, check your breaker box. A Federal Pacific panel will usually have its name or logo on the front cover. Inside, you will find the name Stab-Lok printed near the center or side of the panel. The intact breakers will have the signature red strip that runs across the front.
If you find you a Federal Pacific panel or Stab-Lok breakers, or are not sure, call ESU, Inc. for further information about replacing your circuit breaker panel.
Eaton Cutler-Hammer offers quality power management solutions for professionals in the aerospace, hydraulics, electrical, automotive, filtration and industrial sectors.
Looking for a reliable source for Eaton electrical supplies? Look no further than Electrical Supplies Unlimited (ESU). ESU has been in business for over 40 years serving San Diego, Orange County and Riverside. Whether you're an electrician working on a project or a homeowner tackling a DIY endeavor, ESU is your go-to destination for all your electrical needs. Specializing in Eaton Cutler Hammer Circuit Breakers, ESU offers a comprehensive range of new, surplus, and recycled options to suit every requirement. From single pole 15A 120/240V breakers to 3 pole 3000Amp 600V models, we've got you covered with the full Eaton line. Trust ESU for quality products, competitive pricing, and exceptional customer service. Shop with confidence and experience the convenience of finding everything you need in one place at Electrical Supplies Unlimited.
Key solutions from Eaton Cutler-Hammer include Industrial Control for NEMA starters and contactors, NEMA pushbutton switches, terminal blocks, relays and circuit breakers. Eaton Cutler-Hammer offers photoelectric and proximity sensors, limit switches, PLCs, HMIs, ethernet connectivity, IEC and NEMA contactors, power supplies, 22mm IEC and 30mm NEMA pushbuttons & tactile switches, toggle switches, thermal magnetic circuit breakers, rocker switches, panel meters, counters, timers and other panel instrumentation.
Electrical Supplies Unlimited is your trusted partner in San Diego for all your electrical needs. Specializing in providing top-quality new and used Eaton Circuit Breakers, we cater to electricians and electrician companies with a commitment to quality and affordability. Our extensive inventory of electrical supplies ensures that you have access to the right components for your projects, whether you're working on residential, commercial, or industrial installations. What sets us apart is our dedication to delivering not just products, but solutions – our team of experts is always ready to assist you in finding the precise Eaton Circuit Breaker or other electrical supplies you require. At Electrical Supplies Unlimited, we understand the importance of reliability and efficiency in the electrical field, and we're here to provide you with the tools you need to excel in your work.
As a trusted source of electrical supplies in San Diego, Electrical Supplies Unlimited takes pride in offering competitive prices and personalized service. Our range of products extends beyond Eaton Circuit Breakers to encompass a comprehensive selection of electrical components, ensuring that you have everything you need for a successful project. Whether you're a seasoned electrician or part of an electrical company, we recognize that time is of the essence. That's why we focus on efficiency and responsiveness, striving to meet your requirements promptly and with the utmost professionalism. When it comes to powering your projects, trust Electrical Supplies Unlimited to provide the quality and service that electricians in San Diego have come to rely on. Explore our wide range of electrical supplies today and experience excellence in every connection.
Square D Electrical Supplies manufacture Breakers, Switchgear, Contactors and Motor Starters. As one of the largest electrical manufacturers ESU carries a large and diverse inventory of Square D products, including Circuit Breakers, Transformers, Meter Sections, Disconnects, Panel Board Switches, Switchgear, Contactors and Motor Starters.
Electrical Supplies Unlimited is your trusted source for a wide range of electrical supplies, serving the needs of electricians and electrical companies throughout San Diego. Our commitment to delivering top-notch products and exceptional service sets us apart in the industry. Whether you're working on a commercial or residential project, our extensive inventory includes new and used Square D circuit breakers and a variety of other electrical supplies that meet the highest quality standards. We understand the importance of reliable electrical components in ensuring the safety and efficiency of any electrical system. That's why we take pride in offering products from reputable brands like Square D, known for their durability and performance. At Electrical Supplies Unlimited, we are dedicated to being your go-to partner, providing the essential tools and equipment that electricians rely on to get the job done right. Contact one of our representatives today at 858.558.2850 to find out more!
Our team at Electrical Supplies Unlimited is committed to making your electrical projects a success. With over 40 years of experience, we know how to get the job done. We understand that electricians and electrical companies demand efficiency, affordability, and quality in their supplies, and we deliver on all fronts. Our selection of Square D circuit breakers, alongside our comprehensive range of electrical products, ensures that you have access to the best tools in the trade. Whether you're looking for new components to keep up with the latest industry standards or seeking cost-effective solutions with our used options, we have you covered. When you choose Electrical Supplies Unlimited, you're choosing a partner that understands your needs and is dedicated to your success. Join our satisfied customer base in San Diego and experience the difference of working with a reliable and customer-focused electrical supplies provider.
Square D is an American manufacturer of equipment used to control and distribute electric power. They are headquartered in Palatine, Illinois.
Square D was founded in 1903 in Detroit, Michigan by Bryson Dexter Horton who is credited with the invention of the safety switch which encased high voltage switches and started the company's main line of business of circuit breakers and encased control panels.
We carry a large and diverse inventory of Square D products, including Circuit Breakers, Transformers, Meter Sections, Disconnects, Panel Board Switches, Switchgear, Contactors and Motor Starters. Contact one of our representatives today at 858.558.2850 to find out more!

For over 40 years, ESU has carried a wide stock of ITE Siemens Circuit Breakers. We have everything from a single pole 15A 120/240 through 3 pole 3000 Amp 600V in the ITE Siemens line.
Are you an electrician or a homeowner in search of reliable electrical supplies for your project? Look no further than Electrical Supplies Unlimited (ESU). Specializing in ITE Siemens Circuit Breakers, ESU is your go-to source for buying, selling, and stocking new, surplus, and recycled breakers. With a wide inventory ranging from single pole 15A 120/240 breakers to 3 pole 3000 Amp 600V options, ESU has everything you need to ensure your electrical systems operate smoothly and safely. Our commitment to quality and customer satisfaction means you can trust ESU to provide top-notch ITE Siemens Circuit Breakers that meet your specific requirements. Whether you're a professional electrician or a homeowner tackling a DIY project, count on ESU to supply you with the right breakers to get the job done efficiently.
Electrical Supplies Unlimited is your trusted source for a wide range of electrical supplies, catering to the needs of electricians and electrical companies throughout San Diego, Riverside and Orange county. With 40 years of experience, you know ESU will supply you with a quality fully tested product. With a special focus on quality and affordability, we pride ourselves on supplying both new and used ITE Siemens Circuit Breakers, among a plethora of other essential electrical components. Our commitment to providing top-notch products ensures that our clients can rely on us for all their elect
rical project requirements. Whether you're a seasoned electrician or a budding professional, Electrical Supplies Unlimited is your one-stop destination for high-quality supplies that meet industry standards while offering competitive pricing. What sets Electrical Supplies Unlimited apart is our dedication to offering used
ITE Siemens Circuit Breakers, an economical yet reliable solution that fits within various budgets without compromising on safety or performance. Our vast inventory extends beyond circuit breakers to include a comprehensive range of electrical supplies, ensuring that we are a one-click resource for electricians. Backed by a team of experts who understand the unique demands of the industry, we are committed to providing exceptional customer service, technical support, and prompt delivery to keep your projects running smoothly. With Electrical Supplies Unlimited as your trusted partner, you can confidently tackle electrical tasks, knowing that you have access to top-quality supplies in San Diego.
Electrical Supplies Unlimited (ESU) is your ultimate destination for ITE Siemens Circuit Breakers. Whether you're buying, selling, or stocking breakers for your project, ESU has you covered with a comprehensive inventory of new, surplus, and recycled options. From single pole 15A 120/240 breakers to 3 pole 3000 Amp 600V models, ESU carries a wide range of ITE Siemens Circuit Breakers to suit various applications. With our commitment to quality and extensive stock availability, you can trust ESU to provide the right breakers for your specific needs. Don't settle for subpar electrical supplies – choose ESU for top-notch ITE Siemens Circuit Breakers that deliver reliable performance and peace of mind.
Siemens Corporation is a U.S. subsidiary of Siemens AG, a global powerhouse in electronics and electrical engineering, operating in the industry, energy, healthcare, and infrastructure & cities sectors. For more than 165 years, Siemens has built a reputation for leading-edge innovation and the quality of its products, services and solutions.