1SDA057443R1 ABB E3S-A 1200 PR122/P-LI 1200 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3S-A 1200 PR122/P-LI 1SDA057443R1 Air Circuit Breaker?

The ABB 1SDA057443R1 is a high-performance SACE Emax E3S-A air circuit breaker designed for reliable switching and protection in high-current low-voltage electrical distribution systems. As part of the ABB New Emax series, this three-pole fixed breaker combines a 1200 A rated current with the PR122/P-LI electronic trip unit for demanding industrial, commercial and infrastructure power distribution applications.

The breaker is equipped with an ABB PR122/P-LI R1200 electronic trip unit, providing long-time overload and instantaneous short-circuit protection. The PR122/P platform provides electronic protection and monitoring functionality, while the LI configuration is suited to applications requiring dependable overload and instantaneous fault protection without additional short-time or ground-fault protection functions.

With a rated current of 1200 A, an instantaneous current setting of 18000 A and a three-pole fixed configuration, the E3S-A 1SDA057443R1 is designed for high-current three-phase AC distribution systems. Its fixed construction and rear horizontal terminal arrangement provide a robust solution for integration into compatible low-voltage switchboards and power distribution assemblies.

Key Advantages

• Heavy-duty ABB SACE Emax E3S-A air circuit breaker for low-voltage power distribution.
• 1200 A rated current for demanding high-current electrical installations.
• PR122/P-LI electronic trip unit for electronic overcurrent protection.
• LI functions provide long-time overload and instantaneous short-circuit protection.
• 18000 A instantaneous current setting for rapid response to severe short-circuit conditions.
• Three-pole fixed configuration for three-phase AC distribution systems.
• Rear horizontal terminals support integration into compatible switchboard assemblies.

Key Features

• ABB SACE Emax E3S-A series.
• 1200 A rated current.
• Three-pole air circuit breaker.
• PR122/P-LI R1200 electronic trip unit.
• 18000 A instantaneous current setting.
• Long-time overload protection.
• Instantaneous short-circuit protection.
• Fixed circuit-breaker configuration.
• Rear horizontal terminal arrangement.
• UL version for compatible low-voltage distribution installations.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E3S-A are designed to switch and protect high-current low-voltage distribution circuits. The PR122/P-LI electronic trip unit monitors current conditions and provides long-time protection against sustained overloads together with instantaneous protection against severe short-circuit currents.

The fixed construction of the 1SDA057443R1 makes it suitable for permanent installation within compatible switchboards and distribution assemblies. Its 1200 A current rating, electronic protection and rear horizontal terminal arrangement make it a practical choice for industrial facilities, commercial power systems and other installations requiring dependable high-current circuit protection.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Commercial and infrastructure electrical distribution.
• Manufacturing and process plant switchgear.
• Generator and transformer distribution circuits.
• High-current three-phase AC installations.