1SDA057911R1 ABB E4H-A 3600 PR121/P-LI 3600 A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E4H-A 3600 PR121/P-LI Air Circuit Breaker?

The ABB E4H-A 3600 PR121/P-LI, order code 1SDA057911R1, is a high-performance SACE Emax air circuit breaker designed for protection and switching in demanding low-voltage power distribution systems. Rated at 3600 A, this three-pole breaker combines the E4H-A frame with ABB's PR121/P-LI electronic overcurrent release for dependable overload and short-circuit protection.

As part of the ABB SACE Emax range, the E4H-A is engineered for industrial switchboards, power distribution assemblies and infrastructure installations requiring high current capacity and robust fault interruption. This configuration is a fixed (F) circuit breaker with rear flat horizontal terminals, providing a permanent and robust connection arrangement for integration into low-voltage switchgear.

The E4H-A 3600 has a rated and uninterrupted current of 3600 A, a three-pole configuration and a rated voltage of 600 V. Its rated service short-circuit breaking capacity is 100 kA at 240 V AC and 85 kA at 480–600 V AC, while the PR121/P-LI release provides long-time and instantaneous protection for high-current distribution circuits.

Key Advantages

• Heavy-duty 3600 A air circuit breaker for high-current power distribution.
• PR121/P-LI electronic trip unit provides long-time and instantaneous overcurrent protection.
• Three-pole configuration for three-phase electrical distribution systems.
• Fixed execution provides robust permanent installation within switchgear assemblies.
• Rear flat horizontal terminals support practical integration with switchboard busbars.
• Rated service short-circuit breaking capacity of 85 kA at 480 V AC.
• Designed and rated to UL 1066 requirements.

Key Features

• ABB SACE Emax E4H-A 3600 air circuit breaker.
• 3600 A rated current.
• 3-pole configuration.
• PR121/P-LI electronic overcurrent release.
• LI protection functions: long-time and instantaneous protection.
• Fixed (F) circuit-breaker execution.
• Rear flat horizontal terminal connection.
• 600 V rated voltage.
• 100 kA Ics at 240 V AC.
• 85 kA Ics at 480 V AC and 600 V AC.
• R3600 overcurrent release with 54000 A instantaneous setting reference.
• Fitted with 4 auxiliary contacts and open/closed position indication.

Reliable Protection for High-Current Power Distribution

Air circuit breakers such as the ABB SACE Emax E4H-A protect low-voltage electrical systems against damaging overload and short-circuit conditions. The PR121/P-LI electronic release provides long-time protection against sustained overcurrents together with instantaneous protection for severe short-circuit faults, helping protect conductors, switchgear and connected equipment.

The fixed construction and rear flat horizontal terminals make this E4H-A configuration suitable for permanent integration into industrial switchboards and power distribution assemblies. Its 3600 A current rating and service short-circuit breaking capacity of 85 kA at 480 V AC make it suitable for demanding industrial, commercial and infrastructure power distribution systems.

Typical Applications

• Industrial low-voltage switchboards.
• Main incoming and distribution circuit protection.
• Power distribution centres and switchgear assemblies.
• Manufacturing and process plants.
• Commercial and infrastructure power distribution.
• High-current three-phase electrical distribution systems.