Solid-state circuit breakers (SSCBs) have moved from lab demonstrations to commercial deployment faster than almost any other protection technology in the last decade. Data centers running AI training clusters, battery energy storage systems, EV charging hubs, and DC microgrids all share the same problem: mechanical breakers are too slow, too bulky, and too limited in cycle life for systems that now demand microsecond-level fault interruption and software-defined control. Semiconductor-based breakers built on SiC and IGBT switching devices solve that problem, and a growing number of manufacturers — from century-old industrial conglomerates to focused power-electronics specialists — are bringing SSCB products to market.
This guide profiles the ten manufacturers most relevant to engineers and procurement teams evaluating SSCB suppliers in 2026. Rankings reflect a combination of product maturity, certification status, DC protection portfolio depth, and market visibility in data center and industrial applications. HIITIO is included as the reference point given its focus on DC protection systems for the new energy and data center sectors.
Top 10 SSCB Manufacturers at a Glance
| # | Company | Founded | Headquarters | Flagship SSCB Strength | Website |
|---|---|---|---|---|---|
| 1 | HIITIO | 2018 | Hangzhou, China | HSB1 Series SSCB for 240–1000VDC systems | hiitio.com |
| 2 | Eaton | 1911 | Dublin, Ireland | Solid-state breakers for commercial/industrial power distribution | eaton.com |
| 3 | ABB | 1988 | Zurich, Switzerland | SACE Infinitus RB-IGCT DC breaker | global.abb |
| 4 | Siemens | 1847 | Munich, Germany | SENTRON solid-state protection for low-voltage DC | siemens.com |
| 5 | Schneider Electric | 1836 | Rueil-Malmaison, France | SiC-based breakers for building and industrial DC networks | se.com |
| 6 | Fuji Electric | 1923 | Tokyo, Japan | Semiconductor-based breakers for industrial power systems | fujielectric.com |
| 7 | Infineon Technologies | 1999 | Neubiberg, Germany | SiC/GaN power devices enabling third-party SSCB designs | infineon.com |
| 8 | LS Electric | 1974 | Anyang, South Korea | DC power devices for data center and renewable applications | lselectric.co.kr |
| 9 | Atom Power | 2014 | Huntersville, USA | Atom Switch — UL-listed digital solid-state breaker | atompower.com |
| 10 | Blixt Tech AB | 2018 | Stockholm, Sweden | Blixt Zero — IEC-certified residential SSCB | blixt.tech |
1. HIITIO
- Founded: 2018
- Headquarters: Hangzhou, Zhejiang, China, with manufacturing in Yueqing, Wenzhou
- Core Products: HVDC contactors, semiconductor fuses, DC MCBs, SiC/IGBT power modules, solid-state circuit breakers, complete Solid-State Transformer (SST) systems
- Website: hiitio.com
- Category Link: Solid-State Circuit Breaker Solutions
HIITIO is a Chinese manufacturer specializing in DC protection and power electronics for the new energy vehicle, solar, energy storage, and data center sectors. Operating from a 30,000 m² facility with IATF16949-certified production, the company has built its position around integrating protection components — contactors, fuses, DC circuit breakers, and power semiconductor modules — into complete DC power architectures rather than selling isolated parts. This systems-level approach has become increasingly relevant as AI data centers move toward 800V HVDC power distribution, where protection, conversion, and control need to be engineered together rather than sourced piecemeal from unrelated vendors.
HIITIO’s current flagship in this category is the HSB1 Series Solid-State Circuit Breaker, designed for 240–1000VDC power systems such as AI server racks, battery energy storage, and DC microgrids. The HSB1 combines fast semiconductor-based fault interruption with the mechanical isolation and communication features data center operators expect from a production-grade breaker, positioning it as an alternative to legacy mechanical contactor-fuse combinations in high-density DC racks.
HIITIO pairs the HSB1 with its broader DC protection catalog — including the intelligent Battery Disconnect Unit (iBDU) and its Solid-State Transformer systems — allowing engineers to source coordinated protection across an entire DC bus from a single supplier. Readers evaluating the underlying technology can also review HIITIO’s explainer on what a solid-state circuit breaker is and its dedicated data center power solution page for architecture-level guidance.
2. Eaton
- Founded: 1911
- Headquarters: Dublin, Ireland (operational headquarters in Cleveland, Ohio, USA)
- Core Products: Circuit breakers, power distribution equipment, UPS systems, solid-state protection devices
- Website: eaton.com
Eaton is a diversified power management company with more than a century of history in electrical distribution equipment, and it is one of the handful of established players actively developing solid-state breaker technology alongside its traditional mechanical breaker lines. Eaton’s scale — spanning utility, industrial, commercial, and data center markets — gives it substantial reach into accounts that are only beginning to evaluate SSCBs as an alternative to conventional switchgear.
Eaton’s solid-state circuit breaker work sits within its broader push into intelligent power distribution, where breakers combine semiconductor-based interruption with digital monitoring and communication protocols suited to modern building and data center management systems. As one of the “stars category” players noted for combining electrical distribution credentials with solid-state protection capability, per the DataM Intelligence SSCB market forecast, Eaton’s advantage lies less in being first to market and more in its ability to integrate SSCBs into existing distribution architectures that facilities teams already trust.
3. ABB
- Founded: 1988
- Headquarters: Zurich, Switzerland
- Core Products: Circuit breakers, switchgear, industrial automation, electrification products
- Website: global.abb
ABB is one of the largest electrification and automation groups globally, formed from the 1988 merger of Sweden’s ASEA and Switzerland’s BBC Brown Boveri, and it has translated decades of switchgear expertise into one of the more technically distinctive SSCB products on the market. ABB’s position reflects both its manufacturing scale and its early certification milestones in solid-state DC protection.
ABB positions its solid-state circuit breaker technology as a way to improve power distribution reliability and reduce downtime across industrial and grid applications. Its SACE Infinitus breaker uses a reverse-blocking integrated gate-commutated thyristor (RB-IGCT) design capable of blocking 2.5kV and conducting up to 2,500A, with ABB positioning the product as the first IEC 60947-2 certified solid-state circuit breaker for renewable and DC power grid applications, detecting and clearing faults roughly 100 times faster than a conventional breaker. That certification milestone, combined with ABB’s existing footprint in utility and industrial switchgear, makes it a common reference point for large-scale DC protection projects.
4. Siemens
- Founded: 1847
- Headquarters: Munich, Germany
- Core Products: Circuit breakers, automation systems, power distribution, digital grid technologies
- Website: siemens.com
Siemens is one of the oldest and most diversified electrical engineering companies in the world, with a product portfolio spanning grid infrastructure, industrial automation, and building technologies. Its scale gives it a natural entry point into solid-state protection, particularly for customers who already standardize on Siemens’ SENTRON breaker and switchgear families for low-voltage distribution.
Siemens has been named among the established players — alongside ABB and Fuji Electric — using thyristor and IGBT-based semiconductor technology to achieve microsecond-level fault interruption in cabinet and panel-level breakers, leveraging existing R&D capacity and global distribution networks rather than starting from a clean-sheet design. For customers with existing Siemens low-voltage infrastructure, this integration path can simplify specification and maintenance compared with introducing a new, unfamiliar brand into the switchgear room.
5. Schneider Electric
- Founded: 1836
- Headquarters: Rueil-Malmaison, France
- Core Products: Circuit breakers, energy management systems, industrial automation, EV charging infrastructure
- Website: se.com
Schneider Electric is a global specialist in energy management and industrial automation with one of the broadest circuit protection catalogs in the industry, spanning residential MCBs through utility-scale switchgear. Its long-standing position in building and industrial electrification gives it a natural distribution advantage as SSCB adoption moves from pilot projects into standard specification.
Schneider has been identified as a developer of SiC-based solid-state protection technology aimed at DC-heavy applications such as data centers and renewable integration, building on its existing power semiconductor and drives expertise. Because Schneider’s traditional breaker lines already serve a large share of commercial and industrial buildings, its SSCB rollout is likely to follow the same channel and specification patterns that made its mechanical breakers a default choice for electrical contractors.
6. Fuji Electric
- Founded: 1923
- Headquarters: Tokyo, Japan
- Core Products: Power semiconductors, circuit breakers, industrial drives, energy management systems
- Website: fujielectric.com
Fuji Electric is a century-old Japanese manufacturer with deep roots in power semiconductor design, which gives it a technical advantage in solid-state breaker development that few competitors can match — the company designs and manufactures many of its own IGBT and SiC devices rather than sourcing them from outside vendors. This vertical integration is a meaningful differentiator in a product category where breaker performance is directly tied to the underlying semiconductor.
Market analysts have repeatedly grouped Fuji Electric with ABB and Siemens as one of the manufacturers whose advanced semiconductor-based technology enables ultra-fast fault interruption in microseconds, drawing on extensive in-house R&D and established industrial distribution networks. Fuji Electric’s SSCB efforts are most visible in industrial power distribution and rail applications, markets where its legacy breaker and drive products already have a strong installed base.
7. Infineon Technologies
- Founded: 1999 (spun off from Siemens)
- Headquarters: Neubiberg, Germany
- Core Products: SiC and GaN power semiconductors, discrete devices, power modules
- Website: infineon.com
Infineon does not sell finished circuit breakers directly to end users in most markets, but its influence on the SSCB category is difficult to overstate: the company is one of the largest suppliers of the SiC and GaN power devices that other manufacturers on this list use to build their breakers. Its position reflects a component-level dominance rather than a finished-product market share.
Infineon has formalized this role through direct partnerships with breaker manufacturers, including its collaboration with Blixt Tech to co-develop cost-effective residential SSCBs and its more recent work with LS Electric on high-efficiency DC power solutions for AI data centers, announced in August 2026. For engineering teams evaluating SSCB suppliers, Infineon’s application notes and reference designs are frequently the technical starting point, even when the final purchase decision is made with a breaker OEM.
8. LS Electric
- Founded: 1974 (originally Lucky Packing Co.; renamed LS Electric in 2020)
- Headquarters: Anyang-si, Gyeonggi-do, South Korea
- Core Products: Power distribution equipment, industrial automation, EV components, energy storage systems
- Website: lselectric.co.kr
LS Electric is one of South Korea’s largest electrical equipment manufacturers, with a product line spanning low-voltage switchgear, industrial automation, and, increasingly, DC power infrastructure for renewable and data center applications. Its scale within the Korean and broader Asian electrical markets gives it a strong regional distribution base as SSCB demand grows alongside AI data center construction across the region.
LS Electric’s most notable recent move in this category is its August 2026 collaboration with Infineon to advance high-efficiency direct current power solutions for AI data centers, pairing Infineon’s SiC device portfolio with LS Electric’s power distribution engineering. This partnership signals a broader trend among established Asian electrical manufacturers: rather than developing SSCB semiconductor technology independently, many are pairing with specialist chipmakers to accelerate time to market.
9. Atom Power
- Founded: 2014
- Headquarters: Huntersville, North Carolina, USA
- Core Products: Digital solid-state circuit breakers, intelligent panelboards, EV charging hardware
- Website: atompower.com
Atom Power is a US power electronics company and one of the earliest specialists to bring a solid-state breaker to market. Headquartered in Huntersville, North Carolina, the company was founded in 2014 with the initial goal of building a remote-control circuit breaker, and by 2019 had developed what it describes as the first UL-listed digital solid-state circuit breaker, branded the Atom Switch.
Atom Power’s product, built around its own SiC power modules, is positioned primarily for commercial and industrial buildings, EV charging infrastructure, and increasingly for AI data centers facing rack power densities beyond 1MW. The company reports that its breaker withstood more than one million cycles under full load during endurance testing — well beyond the 6,000-cycle benchmark required under UL 489 for conventional mechanical breakers — which the company presents as evidence of the durability advantage inherent to semiconductor-based switching over mechanical contacts.
10. Blixt Tech AB
- Founded: 2018
- Headquarters: Stockholm, Sweden
- Core Products: Residential and light commercial solid-state circuit breakers
- Website: blixt.tech
Blixt Tech AB is a Swedish deep-tech company that has focused specifically on residential and light commercial SSCB applications, a segment most larger manufacturers have been slower to address given the cost sensitivity of home electrical panels. Founded in Stockholm in 2018, Blixt has built a substantial patent portfolio around solid-state switching, voltage conversion, and battery technology.
In 2021, Blixt’s Zero breaker became what the company describes as the first IEC-certified residential solid-state circuit breaker, and Blixt has since deepened a technology partnership with Infineon to co-develop lower-cost SSCB designs suitable for mass-market housing. While its production volumes remain small relative to industrial suppliers, Blixt’s early certification and its narrow focus on real-time metering and software-controlled power flow make it a frequently cited reference point for the residential end of the SSCB market.
Comparing Application Focus Across the Top 10
| Company | Primary Voltage Class | Primary Application Focus |
|---|---|---|
| HIITIO | 240–1000VDC | AI data centers, ESS, EV, solar DC systems |
| Eaton | LV AC/DC | Commercial & industrial power distribution |
| ABB | Up to 2.5kV DC | Utility-scale DC grids, renewables |
| Siemens | LV AC/DC | Industrial panels, building distribution |
| Schneider Electric | LV DC | Data centers, buildings, renewables |
| Fuji Electric | LV/MV industrial | Industrial power systems, rail |
| Infineon Technologies | Component-level (SiC/GaN) | Enabling technology for OEM breakers |
| LS Electric | LV/MV DC | Data centers, renewable integration |
| Atom Power | LV AC/DC (up to 1MW+ racks) | Commercial buildings, EV charging, data centers |
| Blixt Tech AB | Residential LV | Home and light commercial panels |
Certification and Market Milestones
| Company | Notable SSCB Milestone |
|---|---|
| HIITIO | HSB1 Series launched for 240–1000VDC data center and ESS applications (2026) |
| ABB | SACE Infinitus — claimed first IEC 60947-2 certified SSCB |
| Atom Power | First UL-listed digital solid-state circuit breaker (2019) |
| Blixt Tech AB | First IEC-certified residential SSCB, Blixt Zero (2021) |
| Infineon × LS Electric | Joint SiC-based DC power collaboration for AI data centers (Aug 2026) |
Why HIITIO’s SSCB Portfolio Is Worth a Closer Look
For engineering and procurement teams sourcing DC protection for AI data centers, energy storage systems, or EV infrastructure, HIITIO offers a full-stack alternative to assembling protection components from multiple vendors. The HSB1 Series Solid-State Circuit Breaker is engineered specifically for 240–1000VDC bus architectures, and it is backed by HIITIO’s broader DC protection catalog — HVDC contactors, semiconductor and pyro fuses, DC MCBs, and SiC/IGBT power modules — along with complete Solid-State Transformer (SST) systems for 1.2MW–5MW installations. This lets teams standardize protection coordination across an entire DC power path with a single, IATF16949-certified manufacturer rather than reconciling specifications across separate suppliers. If you’re scoping an 800V HVDC data center project, a battery ESS deployment, or a next-generation DC microgrid, reach out to HIITIO’s engineering team for application-specific product selection and technical documentation.
Frequently Asked Questions
What makes a solid-state circuit breaker different from a mechanical breaker?
An SSCB uses semiconductor devices — typically SiC or IGBT-based — to interrupt current instead of a mechanical contact. This allows fault clearing in microseconds rather than milliseconds, with no arc flash and far higher cycle life, though it typically comes at a higher unit cost than a comparable mechanical breaker.
Are solid-state circuit breakers ready to replace mechanical breakers everywhere?
Not yet across all applications. SSCBs are gaining fastest traction in DC-heavy environments — data centers, ESS, EV charging, and renewable integration — where fault speed and digital control matter most. Mechanical breakers remain common and cost-effective in lower-criticality AC distribution.
Which manufacturers offer complete SSCB systems rather than standalone breakers?
HIITIO, Eaton, ABB, and Siemens all offer SSCBs as part of broader power distribution and protection ecosystems, which can simplify integration compared with sourcing a breaker independently from a specialist supplier.
Does HIITIO’s SSCB support high-density AI data center racks?
HIITIO’s HSB1 Series is designed for 240–1000VDC systems typical of modern AI server rack and battery ESS architectures. For rack-level or facility-level sizing, HIITIO’s data center power solution page outlines the supporting product set.
Is a solid-state circuit breaker the same as a solid-state transformer?
No. An SSCB protects a circuit by interrupting fault current; a solid-state transformer converts and regulates power between voltage levels. The two are often deployed together in DC data center architectures, and HIITIO supplies both as part of a coordinated system.
