Why Choose the ABB 1SDA128899R1 Emax 3 Air Circuit Breaker?
The ABB 1SDA128899R1 is a high-capacity air circuit breaker (ACB) designed for reliable protection, switching and intelligent power management in advanced low-voltage electrical distribution systems. As part of the innovative ABB SACE Emax 3 series, it combines powerful circuit interruption performance with intelligent monitoring, advanced diagnostics and flexible connectivity for modern industrial and infrastructure power networks.
The Emax 3 platform is ABB’s next-generation low-voltage air circuit breaker solution, engineered to support secure, resilient and future-ready electrical installations. It integrates advanced protection functions, intelligent power management features, communication capabilities and asset monitoring tools to improve safety, efficiency and operational continuity.
With an E4.3S frame size, 4000 A rated current, Ekip Aware LSIG electronic trip unit and four-pole fixed configuration with horizontal rear terminals, the ABB 1SDA128899R1 is suitable for high-capacity switchgear assemblies, main distribution boards and critical low-voltage power applications.
Key Advantages
- Advanced ABB SACE Emax 3 air circuit breaker technology for modern power distribution systems.
- 4000 A rated current suitable for high-capacity electrical installations.
- Ekip Aware LSIG protection providing comprehensive overload, short-circuit and earth fault protection.
- Four-pole fixed design for applications requiring neutral conductor switching.
- Intelligent monitoring, diagnostics and communication capabilities for energy management systems.
- Reliable protection and switching performance for industrial and infrastructure applications.
Key Features
- ABB SACE Emax 3 series air circuit breaker.
- E4.3S 4000 frame configuration.
- Ekip Aware LSIG electronic trip unit.
- 4000 A rated uninterrupted current.
- Four-pole fixed execution.
- Horizontal rear terminal connection.
- Long-time, short-time, instantaneous and ground fault protection functions.
- Compatible with ABB digital monitoring and communication solutions.
Reliable Protection for Industrial Power Distribution
Air circuit breakers protect critical electrical systems by monitoring current conditions and safely interrupting circuits during overloads or fault events. The ABB Emax 3 range combines advanced protection with intelligent measurement, diagnostics and communication features to improve reliability, system visibility and operational efficiency.
Designed for modern electrical infrastructure, Emax 3 circuit breakers support industrial automation, energy management and smart distribution systems through scalable connectivity, predictive maintenance functions and advanced digital capabilities.
Typical Applications
- Industrial power distribution systems.
- Main low-voltage switchboards.
- Manufacturing plants and processing facilities.
- Commercial and infrastructure power networks.
- Energy management and monitoring installations.
- Critical power and industrial automation systems.
