1SDA056849R1 ABB SACE Emax E4H 4000 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA056849R1 SACE Emax E4H 4000 A Circuit Breaker?

The ABB 1SDA056849R1 is a high-performance SACE Emax E4H air circuit breaker designed for reliable switching and protection of high-current low-voltage electrical distribution systems. Its product designation is E4H4000PR121/P-LSIIn=4000A3pFHR, combining a 4000 A rated current, three-pole fixed construction, rear horizontal terminals and ABB's PR121/P-LSI electronic overcurrent release.

As part of the ABB SACE Emax range, this E4H circuit breaker is engineered for demanding industrial, commercial and infrastructure power distribution applications. The PR121/P-LSI R4000 electronic trip unit provides long-time overload, short-time short-circuit and instantaneous short-circuit protection, helping safeguard busbars, cables, switchgear and connected equipment against damaging overcurrent and short-circuit conditions.

The 1SDA056849R1 features a three-pole fixed configuration with rear horizontal terminals and a rated uninterrupted current of 4000 A. The E4H performance level supports operation up to 690 V AC, with an ultimate short-circuit breaking capacity of 100 kA at 220–500 V AC and 85 kA at 660–690 V AC, making it suitable for demanding high-fault-level distribution systems.

Key Advantages

• Heavy-duty ABB SACE Emax E4H air circuit breaker for high-current low-voltage distribution.
• 4000 A rated current for demanding electrical installations.
• Three-pole fixed configuration for permanent switchboard installation.
• Rear horizontal terminals for integration into compatible switchboard arrangements.
• Electronic PR121/P-LSI R4000 overcurrent release.
• LSI protection provides long-time, short-time and instantaneous overcurrent protection.
• 100 kA ultimate short-circuit breaking capacity at 415 V AC.
• 100 kA short-time withstand current for 1 s for demanding power distribution systems.

Key Features

• ABB SACE Emax E4H series.
• 4000 A rated uninterrupted current.
• Three-pole circuit-breaker construction.
• Fixed installation execution.
• Rear horizontal terminals.
• PR121/P-LSI R4000 electronic overcurrent release.
• Long-time overload protection.
• Short-time short-circuit protection.
• Instantaneous short-circuit protection.
• 690 V AC maximum rated operational voltage.
• 100 kA Icu at 415 V AC.
• 100 kA Icw for 1 s and 75 kA for 3 s.
• Four auxiliary contacts.
• Circuit-breaker open/closed position indication.

Advanced LSI Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E4H protect major low-voltage distribution circuits while providing dependable switching and isolation. Electronic protection monitors electrical conditions and initiates tripping when configured protection thresholds are exceeded, helping safeguard cables, busbars, switchgear and downstream equipment from potentially damaging overload and short-circuit conditions.

The PR121/P-LSI R4000 release fitted to the 1SDA056849R1 provides long-time overload, short-time short-circuit and instantaneous short-circuit protection. Combined with its 4000 A current rating, three-pole fixed construction and 100 kA breaking capacity at 415 V AC, this E4H circuit breaker is well suited to major distribution boards where high fault levels and dependable electronic overcurrent protection must be accommodated.

Typical Applications

• Main low-voltage electrical distribution boards.
• Industrial high-current power distribution systems.
• High-capacity incoming supplies and feeders.
• Commercial and infrastructure switchboards.
• Factory and manufacturing electrical installations.
• Transformer secondary distribution systems.
• Generator and standby power distribution systems.
• Installations requiring LSI electronic overcurrent protection.
• High-fault-level low-voltage switchgear.
• OEM switchgear and panel-building applications.