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Last updated: January 2026
This directory lists 48 circuit breaker manufacturers across the United States, from high-voltage air circuit breaker specialists to precision miniature circuit breaker producers for electronic OEMs.
Buyers in this space are typically solving for critical overcurrent protection, short-circuit interruption, and system isolation challenges. They need suppliers who can deliver devices with precise trip curves to prevent false positives, robust arc chute designs to safely extinguish fault arcs, and units engineered for specific fault current levels and operational voltages. The aim is always to safeguard equipment, prevent downtime, and ensure personnel safety under all operating conditions.
The landscape of circuit breaker manufacturers is diverse, ranging from large, vertically integrated corporations producing a wide spectrum of molded-case and insulated-case circuit breakers, to specialized boutique firms focusing on particular niches like DC circuit breakers for renewable energy or high-rupturing capacity (HRC) fuses for industrial protection. Some excel in high-volume, standard product lines, while others are adept at custom solutions requiring extensive NRE (Non-Recurring Engineering) for specific environmental resistance or communication protocols.
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48 companies nationwide
Based in Barberton, OH, Akron Electric, Inc. manufactures explosion-proof circuit breakers as part of their comprehensive enclosure product line. They also produce junction boxes, control stations, and motor starters. Their offerings adhere to NEMA 7, 9, 4, 4X, 3 standards, with UL, CSA, ATEX, and IECEx approvals for demanding industrial applications.
Based in Hanover, MD, PwrQ (formerly Allied Power and Control) engineers, manufactures, and supplies power distribution products. They specialize in producing circuit breakers and other critical equipment for data centers, renewable energy, and various mission-critical industrial facilities across the United States.
Altech Corporation, an ISO 9001:2000 certified USA supplier, provides components for industrial control and automation. They offer Altech UL Series Circuit Breakers, delivering UL 489-rated branch circuit protection for industrial panels. The company also performs manufacturing, value-added, and customization services.
Amphenol Network Solutions provides a comprehensive selection of fuses and circuit breakers. These components are integral to their broad portfolio of secondary power distribution panels, supporting various network infrastructure applications and needs.
Based in Newell, WV, ATC Diversified Electronics manufactures Motor Protection Circuit Breakers. These circuit breakers provide reliable overload and short circuit protection, suitable for various industrial applications, including group motor installations. They focus on essential electrical safety components.
Atom Power, Inc. manufactures UL-listed digital solid-state circuit breakers, transfer switches, and transformers. This technology transforms electrical distribution, eliminating arc flash and reacting significantly faster than mechanical systems. They provide intelligent power control for EV charging, data centers, and industrial operations.
Based in Highland, IL, Basler Electric manufactures innovative power solutions and energy technologies, serving diverse sectors. Now part of Littelfuse, the company enhances its capabilities in delivering high-quality power system components and protective solutions for industrial and commercial applications.
Becker Mining USA engineers and manufactures industrial electrical protection systems and power centers for the global mining industry. Based in Bristol, VA, they offer robust solutions for energy distribution and automation, undergoing extensive factory testing to MSHA, IEEE, NFPA, and NEMA standards.
Based in Beaver, PA, c3controls manufactures and supplies a comprehensive range of electrical control products. The company is ISO 9001:2015 certified, offering high-quality components for various industrial applications with options for same-day shipping.
Based in Ontario, CA, California Panelboard Manufacturing specializes in custom panelboard and busbar production. The company also provides design, engineering, retrofitting, and upgrade services for backup power and industrial energy storage. They serve data centers, commercial buildings, renewable energy sites, and industrial plants across North America.
Based in Exton, PA, CBI Inc. manufactures UL-listed low-voltage electrical distribution, protection, and control equipment. They specialize in custom circuit breaker products, including Miniature Circuit Breakers (MCB) and Molded Case Circuit Breakers. Operating an ISO 9001:2015 accredited facility, CBI controls its supply chain, serving North American distributors.
Based in St. Paul, MN, GE Vernova manufactures highly reliable high voltage circuit breakers and advanced switchgear technology. The company provides electrification systems and energy generation technologies, aiming to improve grid stability and support the new era of electric power.
Based in Pittsburgh, PA, HICO America provides a comprehensive range of dead tank circuit breakers. These industrial-grade circuit breakers are designed for high reliability, performance, and sustainability, supporting voltage ratings from 72.5 kV to 800.
Industrial Electric Mfg. (IEM), based in Fremont, CA, is a full-line manufacturer of electrical distribution and control systems. The company specializes in mission-critical and power quality solutions, offering over 35 years of expertise in complete power system integration. They provide robust electrical equipment for various industries.
Legrand US manufactures protective electrical devices compliant with NEC® requirements. These devices are designed to safeguard against electrical fires caused by arc faults and injury due to electrical shock. The company provides solutions for safe, secure, and sustainable electrical infrastructures, including data centers.
Based in Lincolnshire, IL, LS Electric America, the US subsidiary of global LS Electric, manufactures advanced electrical components. They specialize in a comprehensive range of circuit breakers, including molded case (MCCB) and air circuit breakers (ACB), providing essential electrical protection for commercial and industrial power systems.
Mitsubishi Electric Power Products, Inc. (MEPPI) manufactures high voltage and vacuum circuit breakers for critical power transmission infrastructure. Serving North American power systems, transportation, and video display markets, the company provides innovative solutions for evolving energy demands. They specialize in designing and producing robust products.
Based in Addison, TX, NOARK Electric (USA) Inc. manufactures and supplies electrical power distribution equipment. They produce low-voltage switchboards, power, molded case (MCCB), and miniature circuit breakers, plus motor-circuit protectors. Their portfolio covers medium, high, and extra-high voltage products, serving commercial and industrial facilities across North America.
Based in Chicago, IL, S&C Electric Company is a global provider of equipment for electric power systems. They manufacture fault interrupters and feeder protection devices, including the IntelliRupter® PulseCloser®, and the EdgeRestore® Underground Distribution Restoration System. S&C also offers PME Pad-Mounted Gear.
Based in Mountainside, NJ, Snap Action Inc. manufactures a range of circuit breakers for permanent fuse replacement and circuit protection. The company provides automatic, manual, and remote type thermal, resettable circuit breakers. Established in 1977, all products are proudly made in the USA with USA-sourced materials.
Sparkstone Electrical Group manufactures fully engineered, tested, and field-proven power distribution equipment in the USA. Their products are built to meet UL, ANSI, and IEEE standards, serving commercial and industrial applications requiring reliable electrical infrastructure components.
Based in San Leandro, CA, Trayer Engineering Corporation manufactures quality electrical distribution switchgear, including submersible, vaultmount, padmount, solid dielectric, and vacuum switchgear. Serving various electrical infrastructure needs, their products are proudly assembled in the USA. Established in 1962.
Utility Relay Company manufactures microcontroller-based, true-RMS solid-state trip units and retrofit conversion kits for AC and DC power circuit breakers. Based in Chagrin Falls, OH, they provide solutions for safely viewing status, controlling breakers, and analyzing data, offering smart monitoring capabilities for electrical networks.
Based in Richmond, VA, Weidmuller manufactures a range of industrial connectivity solutions. The company specializes in hydraulic magnetic circuit breakers, offering products like the universal-voltage HB-SERIES. They provide comprehensive electrical connection, transmission, and conversion solutions for industrial applications.
Based in Houston, TX, RESA Power specializes in remanufacturing and providing replacement solutions for low, medium, and high-voltage circuit breakers. The company offers testing, repair, and custom manufacturing of replacement circuit breakers, retrofit kits, and cradle-in-cradle solutions for various electrical power equipment.
Amber Solutions, Inc. develops and brings to market patented solid-state technologies for electrical infrastructure. They produce UL 489i listed solid-state circuit breakers designed to replace traditional mechanical breakers, offering enhanced safety, reliability, and digital control for commercial and residential applications.
Based in Middletown, PA, Phoenix Contact manufactures a comprehensive range of industrial electrical and electronic technology products. The company specializes in producing electronic circuit breakers, including the PTCB series, designed for critical load protection in diverse industrial applications.
Based in Fort Lee, NJ, Pioneer Power Solutions, Inc. manufactures specialty electrical transmission, distribution, and on-site power generation equipment. They fabricate custom low voltage panelboards, switchboards, switchgear, and medium voltage load interrupter switches. The company serves utility, industrial, commercial, and backup power markets.
Redler Technologies custom-engineers and delivers power and motion systems for military, aerospace, and industrial projects. They specialize in intelligent power protection, including smart circuit breakers that combine advanced protection with intelligent monitoring capabilities, ensuring seamless power management and system safety in demanding environments.
Rockwell Automation provides a comprehensive portfolio of industrial motor control and protection solutions. Their offerings include essential components such as circuit breakers, designed for reliability and ease of integration. The company serves various industrial sectors globally, with strong presence and product availability in the United States.
Based in Cranberry Township, PA, Westinghouse Electric Company LLC manufactures miniature circuit breakers. The company provides precision electrical safety solutions, protecting circuits and devices for various applications. They focus on delivering reliable components for secure electrical systems within the United States and globally.
Fuji Electric Corp. of America is a power electronics and electronic equipment manufacturer based in Edison, NJ. The company specializes in producing quality products for various applications, including industrial drives, power generation, and distribution & control systems, supporting businesses with reliable performance solutions.
Breaker Service, Inc. manufactures and distributes aftermarket parts for high-voltage substation equipment, including circuit breakers and transformers. Based in La Habra, CA, the company provides essential components and mechanisms, supporting the maintenance and repair of critical electrical infrastructure for industrial and commercial clients.
MacLean Power Systems manufactures and supplies products for the electric utility power infrastructure. The company provides a comprehensive range of solutions, including overhead and underground products, insulators, connectors, arresters, and cutouts, serving customers worldwide from its Fort Mill, SC base.
Based in Gray Court, SC, Meiden America Switchgear, Inc. manufactures high-performance vacuum interrupters and dry air-insulated dead tank vacuum circuit breakers. A pioneer in VI technology, the company offers green alternatives, eliminating SF₆ for zero emissions and low maintenance in power distribution applications.
Myers Power Products manufactures medium voltage vacuum circuit breakers for diverse industrial needs. They also produce DC circuit breakers, available in various configurations. The company specializes in power products designed to ensure reliable and efficient electrical infrastructure for commercial and utility applications.
Powell Industries, based in Houston, TX, is an electrical engineering and manufacturing company. They provide custom-engineered power distribution systems, including ANSI Metal-Clad Switchgear and IEC Switchgear. Serving diverse industrial markets like oil and gas, utilities, and renewables, they focus on reliable solutions.
Mitsubishi Electric, a global manufacturer, offers a broad spectrum of electrical and electronic equipment in the US. Their diverse product lines include power products like circuit breakers, automation equipment, and semiconductors, serving industries from green building solutions to automotive and space systems.
Based in Plainville, CT, Carling Technologies manufactures a comprehensive range of high-quality marine switches and circuit breakers. Their product line includes hydraulic-magnetic and thermal breakers, alongside GFCI/ELCI devices. They serve the marine and various industrial sectors with robust and reliable electrical control solutions.
ABB Electrification U.S. specializes in manufacturing comprehensive residential circuit breaker offerings. Their products comply with NEC, NEMA, ANSI, and CSA requirements, providing advanced protection, including dual-function breakers for various applications within the electrification domain.
Based in Bolingbrook, IL, G&W Electric manufactures high-voltage electrical equipment. The company specializes in developing pole top reclosers, including the world's first 72.5kV model, providing reliable overcurrent protection for overhead power lines. G&W Electric's solutions contribute to modern power transmission and distribution systems.
Industrial Electric Manufacturing (IEM) designs, produces, and deploys custom power distribution systems. With 75+ years of experience, IEM serves diverse industries like technology, data centers, energy, and manufacturing. They provide flexible solutions for specialized technical requirements and large-scale production needs.
Schneider Electric USA, headquartered in Boston, MA, manufactures a comprehensive range of molded case circuit breakers. Their offerings include frame sizes from 15 to 3000 A, featuring various connection and mounting options, such as the I-Line. The company provides essential electrical protection solutions for industrial and commercial applications.
Sensata Technologies designs and manufactures Airpax® circuit breakers, providing compact and robust circuit protection solutions. Their offerings, including the LEJ and LUX series, deliver exceptional performance with up to 100G shock ratings, optimizing system uptime for industrial and commercial applications.
Siemens is a global technology company and direct manufacturer of residential circuit breakers. They provide various types of electrical protection solutions designed to meet customer needs and comply with the requirements of the National Electric Code. Their offerings serve diverse industrial and commercial markets.
Leviton Manufacturing Co., Inc. directly provides a range of connected home electrical solutions, including advanced smart circuit breakers. The company offers 2nd Gen Smart Circuit Breakers with remote control, dual function AFCI/GFCI, and various amp ratings, alongside smart dimmers and EV chargers.
Based in Houston, TX, Toshiba International Corporation (TIC) manufactures high-performance vacuum circuit breakers, including their HV6 series. These compact and reliable circuit breakers are specifically designed for medium-voltage, low-capacity power applications, providing robust electrical protection. TIC serves industrial and commercial sectors across the United States with advanced power solutions.
Based in Bay City, MI, Mersen is a global expert in electrical power and advanced materials. The company engineers high-performance and reliable DC overcurrent protection devices. These solutions ensure rapid response to overcurrent events, preventing damage in various electrical systems.
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| Type | Best For | Typical MOQ |
|---|---|---|
| Full-Line Industrial Breaker Manufacturer | Standardized high-volume AC/DC applications, comprehensive product range for main panels to branch circuits, competitive pricing on common ratings. | 100+ units for standard products, higher for specific ratings |
| Specialty Protection Manufacturer | Niche applications like DC systems (solar/EV), high-frequency circuits, military/aerospace, or specific compliance (e.g., marine). Focus on robust, often higher-cost, specialized solutions. | 10-50 units, depending on specialization |
| Custom & Small Batch Manufacturer | Prototype development, highly customized trip curves, unique form factors, integrating new sensor tech, or very low-volume critical applications where NRE is justified. | 1-10 units (often with significant NRE) |
The interrupting capacity, or breaking capacity, is crucial. It must be equal to or greater than the maximum available fault current at the point of installation. This isn't just the load current; it’s the worst-case current a fault could draw from the source. Consult an electrical engineer for a short-circuit study to determine the exact value, as under-specifying IC can lead to catastrophic breaker failure in a fault condition.
Thermal-magnetic trip units use a bimetallic strip for thermal (overload) protection and an electromagnet for magnetic (short-circuit) protection, offering fixed or limited adjustability on trip settings. Electronic trip units, conversely, use sensors and microprocessors to monitor current, providing much greater precision, adjustability, and often advanced features like ground fault protection, communication capabilities, and custom trip curve programming, though typically at a higher cost.
UL 489 is the standard for Molded-Case Circuit Breakers, which are primary overcurrent protective devices intended for branch circuit protection in electrical distribution systems. UL 1077 is for Supplementary Protectors, designed for use within equipment to protect specific components and are not intended for branch circuit protection. Choosing the wrong standard can lead to code violations or inadequate safety. Always verify the application with a certified electrical expert.
Yes, many manufacturers, especially those specializing in electronic trip units, can customize trip curves. This is particularly valuable for protecting complex loads like specific motor types, variable frequency drives (VFDs), or sensitive electronic equipment where standard curves might cause nuisance tripping or inadequate protection. It often involves non-recurring engineering (NRE) costs and requires thorough testing to ensure compliance and performance.
Common failure modes include contact welding, degradation of the arc chute, spring mechanism fatigue, and trip unit malfunction. Manufacturers rigorously test for these through several methods: endurance testing (thousands of open/close cycles), short-circuit interruption tests at maximum IC, dielectric withstand voltage tests, thermal cycling, and vibration tests. Reputable manufacturers will provide detailed test reports and compliance documentation.