Why Choose the ABB 1SDA125779R1?
The ABB 1SDA125779R1 is an Emax 3 E4.3N 4000 Ekip Aware LSI four-pole withdrawable moving part designed for high-capacity low-voltage power distribution and circuit protection applications.
With a rated current of 4000 A and Ekip Aware LSI electronic protection, this ABB SACE Emax 3 component provides long-time, short-time and instantaneous protection functions for demanding industrial and infrastructure electrical systems.
As a WMP moving part for the E4.3N frame, the 1SDA125779R1 combines high-current switching capability, electronic protection and withdrawable construction for practical installation, maintenance and system management.
Key Advantages
- ABB SACE Emax 3 E4.3N platform for high-capacity low-voltage power distribution.
- 4000 A rated current for demanding electrical installations.
- Ekip Aware LSI electronic release with long-time, short-time and instantaneous protection.
- Four-pole configuration for comprehensive three-phase and neutral switching applications.
- Withdrawable moving-part configuration for convenient installation and maintenance.
- 66 kA ultimate short-circuit breaking capacity at 440 V.
- Four auxiliary contacts for integration with control, signalling and monitoring circuits.
Key Features
- Product family: ABB SACE Emax 3
- Frame size: E4.3N
- Rated current: 4000 A
- Protection unit: Ekip Aware LSI
- Poles: 4
- Execution: Withdrawable moving part (WMP)
- Protection functions: Long-time, short-time and instantaneous
- Auxiliary contacts: 4
- Order code: 1SDA125779R1
- EAN: 8056221263313
Power Distribution & Protection
The ABB Emax 3 E4.3N platform is designed for high-capacity low-voltage power distribution, providing dependable circuit protection for industrial facilities, infrastructure and large electrical installations. The 1SDA125779R1 moving part forms part of a withdrawable Emax 3 breaker arrangement, supporting practical equipment access and maintenance.
Its Ekip Aware LSI electronic protection unit combines long-time, short-time and instantaneous protection functions with the E4.3N frame's high-current capability. The four-pole configuration and auxiliary contacts also support integration into switchboards requiring comprehensive protection, signalling and control functionality.
Typical Applications
- Industrial power distribution switchboards
- Large commercial electrical installations
- Manufacturing and process plants
- Infrastructure and utility distribution systems
- High-capacity main and feeder protection
- Low-voltage distribution assemblies
- Power control and protection systems requiring withdrawable circuit breakers
