The electrical world changes fast. Reliable circuit protection is important. It helps keep homes, stores, and factories safe. MCBs (Miniature Circuit Breakers) stop too much electricity. They also stop short circuits. They make sure power stays on and people stay safe. With more renewable energy, electric vehicles, and smart grids, choosing the right MCB supplier is very important. This guide lists the top 10 MCB suppliers in the USA for 2025 and shows their main products and strengths. It helps you pick the best supplier for your needs.
1. HIITIO
HIITIO started in 2018 and quickly became a key supplier in America. With our own R&D center and a manufacturing facility of over 30,000 m², HIITIO delivers great performance and large-scale production. HIITIO delivers top-tier UL standards and fast delivery, while focusing R&D on the surging renewable and EV sectors.
- Origin: Zhejiang, China – with global manufacturing and compliance capabilities
- Certifications: UL489 (E535785), IEC, CE, TUV
- Core Focus: High-voltage DC/AC protection for renewable energy and EV systems
- Official Website: https://www.hiitio.com/
Featured Products
- UL489 Miniature Circuit Breakers (1P/2P/3P, up to 125 A, 240 VAC)
Breaker family offers thermal‑magnetic tripping with a robust 10 kA interrupting capacity. These units can be mounted on standard 35 mm DIN rails. They have red and green indicators to show the contact position. Mounting feet are optional. The handles can be locked. - DC MCBs (HCDB1 Series, up to 63 A @ 1000 VDC)
Made for solar systems, EV charging, and battery storage, these breakers stop arcs quickly and handle high voltages well. UL-certified for DC use, they are a good choice for clean energy applications. - Plug-in Homeline‑style Breakers (5–60 A, 10 kA interrupting)
Compatible with North American residential panels, these breakers simplify logistics and retrofit applications.
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2. Schneider Electric
Schneider Electric is a global energy management and automation leader with over 180 years of history. Schneider makes circuit breakers for homes and businesses. Their breakers are strong, reliable, and work well with many U.S. electrical systems. Schneider Electric’s Square D brand is known for new ideas and good products. It is easy to find through big distributors like Grainger, Graybar, and Rexel. The brand also offers strong warranty and service in the U.S.
- Origin: Headquartered in France; major operations across the United States
- Certifications: UL489, UL67, CSA, IEC 60898
- Official Website: https://www.se.com/ww/en/
Featured Products
- QO™ Series Miniature Circuit Breakers
Available in 1P–3P versions up to 70A, these breakers feature a “Visi-Trip” indicator for easy fault identification and support up to 22kA interrupting capacity. - Homeline® Series Circuit Breakers
Tailored for residential use, Homeline breakers offer 15–100A ratings with AFCI/GFCI options and are fully compatible with Homeline Load Centers. - Multi9™ UL489 Series (DIN-rail MCBs)
This series is made for OEMs and industrial panels. It supports up to 63A and can use extra parts like auxiliary contacts and shunt trips. Rated for 10kA.
3. Eaton Corporation
Founded in 1911, Eaton is a global Fortune 500 industrial powerhouse. Eaton has strong research and manufacturing centers in the U.S. They provide circuit breakers for homes, businesses, factories, and utilities. Eaton focuses on making smart and energy-saving breakers for America.
- Origin: Cleveland, Ohio, USA
- Certifications: UL1092 (UL489 for OEM variants), CSA, IEC, RoHS
- Official Website:https://www.eaton.com/us/en-us.html
Featured Products
- BR Series (Residential Load-Center MCBs)
Thermal-magnetic breakers available in 1P and 2P, rated 5–100A, with optional AFCI and GFCI protection. - CH Series (Residential & Light Commercial)
Rated up to 70A, these breakers feature plug-on neutral technology and durable copper contacts, with 10kA interrupting capacity. - Eaton OEM UL489 DIN-Rail Breakers (C and H-frame)
DIN-rail breakers from 0.5–63A with thermal-magnetic trip, accessory-ready, ideal for OEM panels and control systems.
4. ABB Electrification (USA)
ABB is a recognized global leader in electrical engineering, robotics, and automation. Their U.S. operations include manufacturing and R&D facilities, distributing components across residential, industrial, and renewable energy markets. ABB’s MCBs emphasize performance and modular system design.
- Origin: Zurich, Switzerland / Neenah, Wisconsin, USA
- Certifications: UL489, UL1077, IEC/EN, CE, CCC
- Official Website: https://global.abb/group/en
Featured Products
- S200 Series DIN-Rail Breakers
Rated 1–63A with selectable tripping curves (B, C, D, etc.), ideal for compact industrial and commercial panels. - S800 Series High-Breaking Industrial Breakers
Offering 6–63A with interrupting capacity up to 50kA, these breakers feature thermal-magnetic or electronic trips. - UL489 OEM DIN Breakers with IEC Advantages
Available in 1–4P with full accessory support, combining UL489 compliance with IEC-style flexibility.
5. Siemens
Siemens USA is a trusted company for electrical protection in homes, businesses, and factories. The company is based in Georgia and focuses on new technology. It invests in research, digital tools, and smart filtering systems.
- Origin: Munich, Germany / Alpharetta, Georgia, USA
- Certifications: UL489, UL1077, IEC 60898, CSA
- Official Website:https://www.siemens.com/global/en.html
Featured Products
- Q Series Residential Breakers
Plug-in residential breakers rated 5–70A with up to 65kA interrupting capacity; available in AFCI/GFCI and tandem options. - BQD Series Industrial Breakers
1–3P, 100A breakers with thermal-magnetic trip units, designed for MCCs and panel boards. - UL489 DIN-Rail OEM Breakers
Rated 0.5–63A, supporting common accessories like shunt trips and UVR.
6. Noark Electric
Noark Electric is a global manufacturer with a strong presence in the U.S. market. They focus on low-voltage electrical components, including miniature circuit breakers, offering high-performance and cost-effective options for OEM and panel builders.
- Origin: Pomona, California, USA
- Certifications: UL489, UL1077, CSA, IEC, CE
- Official Website: https://noark-electric.eu/en
Featured Products
- Ex9B Series UL489 MCBs
Rated 0.5–63A with 10kA interrupting capacity, these breakers feature thermal-magnetic trip curves (B, C, D) and fit DIN rail mounting systems. - UL1077 Supplementary Protectors
Designed for control circuit and lighting protection in industrial panels, available in 1–3 poles. - Industrial DC Breakers
Suitable for solar and EV applications, these DC-rated breakers support up to 1000 VDC with arc-suppression designs.
7. Leviton Manufacturing
Leviton is a top U.S. electrical company. They make wiring devices, automation products, and smart home solutions. They are expanding their line of smart, connected miniature circuit breakers.
- Origin: Melville, New York, USA
- Certifications: UL489, UL1077, UL2043, FCC
- Official Website: https://leviton.com/
Featured Products
- Smart AFCI/GFCI MCBs (Leviton Load Center)
Bluetooth-enabled breakers with app diagnostics and LED trip indicators. - Hydraulic-Magnetic Breakers
Accurate, temperature-independent tripping ideal for sensitive circuits. - UL489 Load-Center MCBs
Compact, tool-less plug-in or bolt-on breakers designed for residential and light commercial panels.
8. Milbank Manufacturing
Milbank specializes in load centers, metering, and breakers—particularly for utility, mobile-home, and RV applications.
- Origin: Kansas City, Missouri, USA
- Certifications: UL489, UL414 Meterless
- Official Website:https://www.milbankworks.com/
Featured Products
- Load Center Breakers
Thermal-magnetic breakers rated 15–100A, 10kA interrupting capacity. - Meter-Plus-Breaker Combo Systems
Factory-approved assemblies for mobile homes, RV parks, and remote cabinets.
9. Connecticut Electric
Connecticut Electric offers a wide selection of UL489 breakers, including replacements for obsolete panel breakers. Ideal for home remodels and light-commercial updates.
- Origin: Maine, USA
- Certifications: UL489, UL414
- Official Website: https://www.connecticut-electric.com/
Featured Products
- UBI Replacement Breakers
UL-listed drop-in replacements for legacy Zinsco, Pushmatic, FPE, and Stab-Lok panels. - Panel-Compatible MCBs
Thermal-magnetic breakers rated 5–63A, working with common accessories.
10. LS Electric USA
LS Electric provides automation and power distribution products globally, with increasing traction in the U.S. OEM market. Their MCBs are designed for smart buildings and industrial panels with advanced protection and space-saving designs.
- Origin: Chicago, Illinois, USA (HQ: South Korea)
- Certifications: UL489, IEC 60947, CCC, CE
- Official Website:https://www.lselectricamerica.com/
Featured Products
- Susol MCB Series
UL489-certified breakers for 1P to 4P configurations, rated up to 63A with high mechanical endurance. - DC MCBs for Solar Applications
Specially rated for photovoltaic installations up to 1000 VDC. - Compact DIN-Rail Breakers
Slim-profile MCBs for control cabinets and switchgear systems.
Choose HIITIO for Your Next MCB Project
HIITIO offers a wide range of miniature circuit breakers made for today’s power systems. All are UL489 certified for safety and quality. We provide fast delivery, good prices, and strong technical support to help your projects succeed. Ready to upgrade your circuit protection? Contact HIITIO now for detailed specifications, datasheets, and sample orders. Let us help you create safer and smarter electrical systems.
