A SOLID-STATE CIRCUIT BREAKER BUILT FOR RESILIENT DC POWER SYSTEMS
SACE Infinitus is ABB's solid-state circuit breaker for low-voltage direct current systems and the world's first fully IEC 60947-2 certified Solid State Circuit Breaker. It is designed for environments where fault currents rise too quickly for conventional protection technologies to respond effectively.
By combining solid-state interruption with electromechanical isolation, SACE Infinitus integrates multiple functions into one compact platform: circuit breaker, load switching, galvanic isolation, energy meter, and communication capabilities.
With ratings up to 2500A and operation up to 1250V DC, it enables designers to build safer, more energy-efficient, and more resilient DC systems for marine transportation, smart buildings, renewable energy, battery storage applications and AI DC Data Centers.
CHOOSE THE RIGHT SACE INFINITUS PERFORMANCE LEVEL
SACE Infinitus is available in three configurations — S, H, and V — each designed for different di/dt conditions and installation needs. All versions can handle unlimited prospective short-circuit current, removing traditional breaker rating limits and giving you greater flexibility in system design while the liquid cooling allows to achieve a compact design. Because di/dt defines how quickly fault current rises, it is a key selection parameter: it helps determine which configuration best matches your application’s protection requirements, footprint constraints, and overall performance goals. Across all versions, SACE Infinitus delivers the same core advantages: ultra-fast solid-state interruption, integrated monitoring and communication, and an all-in-one architecture for advanced DC protection.
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S Performance Level
For di/dt below 80 A/μs:
Most compact option, ideal for systems with controlled fault characteristics. Best for smart buildings, industrial DC distribution, microgrids, and renewable interfaces where panel space and system simplicity are priorities.
Key benefits
- Compact all-in-one platform
- Ultra-fast fault interruption
- Integrated metering and communication
- Lower power losses than conventional solid-state alternatives
- Simplified integration into DC distribution systems
Typical applications
- Smart buildings
- Industrial DC distribution
- Microgrids
- Selected renewable interfaces
H Performance Level
For di/dt below 100 A/μs:
Handles more demanding rise-rate conditions while maintaining the same platform benefits. Engineered for tougher DC environments like smart transportation, marine electrification, and higher-performance renewable or storage architectures.
Key benefits
- Higher-performance rise-rate handling
- Supports demanding DC fault conditions
- Integrated monitoring and communication
- Supports uptime in critical applications
- Suited to transport and marine electrification
Typical applications
- Smart transportation
- Marine systems
- Advanced renewable integration
- Higher-performance DC architectures
V Performance Level
For unlimited di/dt:
When your application has no predictable di/dt limit. V includes an external Rise Time Limiter to manage severe fault environments. Designed for large battery energy storage systems, utility-scale renewables, and high-power DC segments where fault behavior is especially challenging.
Key benefits
- Highest-performance Infinitus configuration
- No di/dt limit
- External Rise Time Limiter for demanding DC conditions
- Suited to large battery and utility-scale applications
- Supports high-power DC system design
Typical applications
- Large battery energy storage systems
- Utility-scale renewables
- High-power DC segments
- Advanced industrial DC systems
WHY ENGINEERS CHOOSE SACE INFINITUS
Ultra-fast fault isolation
<p>With fault isolation in less than 25 microseconds and switching up to 1000x faster than traditional protection technology, SACE Infinitus helps limit fault propagation and supports higher service continuity.</p>Lower operating losses
<p>An optimized semiconductor device reduces losses by up to 70%, helping system designers lower operating cost and improve overall energy efficiency.</p>Arc flash mitigation
<p>Near-zero arc energy exposure during interruption helps improve protection for both people and equipment in demanding DC environments.</p>All-in-one functionality
<p>SACE Infinitus combines the functions of circuit breaker, contactor, isolator, energy meter and connectivity hub, reducing component count and simplifying system design.</p>Built for emerging DC applications
<p>The platform is designed for low-voltage DC systems in marine, smart transportation, smart buildings, renewables, and battery energy storage applications.</p>Digital integration and control
<p>Integrated measurement, communication and software functions, support, commissioning, monitoring, diagnostics, and broader electrical system integration.</p>EPD Declaration
<p>The world's first fully IEC 60947-2 certified Solid State Circuit Breaker. Ultra-fast semiconductor technology enables breaking times down to 15 microseconds, handling up to 2,500A at 1,250V DC.</p>TECHNICAL DATA AT A GLANCE
The technical data below highlights the performance characteristics most relevant to consultants,OEMs, panel builders, and system designers evaluating solid-state circuit breaker technology for direct current systems. These figures show where SACE Infinitus differs most clearly from conventional protection approaches.
Maximum current Up to 2500A
<p>Supports high-current DC applications and large low-voltage DC architectures.</p>Operating voltage Up to 1250V DC
<p>Designed for demanding direct current power systems and next-generation DC distribution use cases.</p>Protection directionality Bidirectional
<p>Designed for demanding direct current power systems and next-generation DC Interrupts short-circuit currents in both directions, supporting a wider range of DC architectures.</p>Fault isolation time Less than 25 microseconds
<p>Helps contain faults before they affect the wider DC network.</p>Switching speed Up to 1000x faster
<p>Provides near-zero breaking time compared with traditional protection technology.</p>Certifications IEC 60947-2, CCC, CCS, DNV marine
<p>Supports specification confidence for industrial, marine and advanced DC applications.</p>Power loss reduction Up to 70%
<p>Helps reduce operational cost and improve efficiency in continuous-duty DC systems.</p>Electrical life Up to 100x
<p>Supports long-term reliability in demanding switching environments.</p>Cost savings Up to $100K USD
<p>For a 4MV renewables plant thanks to SACE Infinitus’s 25 microsecond breaking time and immediate fault isolation</p>Arc energy exposure Near zero
<p>Supports true arc flash mitigation for people and equipment.</p>Prospective short-circuit capability Unlimited
<p>No stated restriction in the value of maximum prospective short-circuit current the breaker can handle.</p>DIRECT CURRENT SYSTEMS
Direct current (DC) is redefining how we produce, store, and consume energy. In the age of renewables, electric mobility, and digital infrastructure, DC offers a smart way to manage power — more efficient, more stable, and easier to control.
From solar panels to battery storage and EV charging, DC seamlessly connects the technologies shaping tomorrow’s energy landscape. It powers resilient microgrids, supports sustainability goals, and enables cleaner, more reliable power — exactly where and when it’s needed.
FREQUENTLY ASKED QUESTIONS
A solid-state circuit breaker uses power electronics to interrupt fault current far faster than conventional mechanical switching alone. In this case, SACE Infinitus is ABB’s solid-state circuit breaker for direct current power systems, and ABB presents it as the world’s first fully IEC 60947-2 certified SSCB.
SACE Infinitus combines solid-state interruption with electromechanical isolation in one all-in-one device. Compared with conventional DC circuit breakers, it is designed for fault isolation in less than 25 microseconds, lower power losses, near-zero arc energy exposure and broader functionality, including metering and communication.
SACE Infinitus combines the functions of a circuit breaker, contactor, isolator, energy meter and connectivity hub in a single platform. This helps reduce system complexity and supports more compact DC switchgear and distribution designs.
The product is designed for direct current power systems in applications such as marine electrification, smart transportation, smart buildings, renewables, and battery energy storage. These are environments where fast-rising faults, high uptime requirements, efficiency and electrical safety are all critical.
Key figures include operation up to 1250V DC, current handling up to 2500A, fault isolation in less than 25 microseconds, switching up to 1000x faster than traditional protection technology, up to 70% lower power losses and near-zero arc energy exposure. The Infinitus platform is also available in S, H and V performance levels for different application demands.
SACE Infinitus supports EKIP Link and Modbus TCP as standard, while Profibus, Profinet are available on request. Software support includes Ekip Connect for programming and commissioning and the EPIC mobile app, along with programmable DI and DO, PLC-like programming and integrated measuring functions.
Safety is central to the product concept. ABB highlights near-zero arc energy exposure during interruption for arc flash mitigation, as well as galvanic isolation to support faster and safer servicing in renewable and storage applications. These features help protect both personnel and equipment while reducing the risk of wider system disruption.