1SDA056402R1 ABB E3H1600 PR121/P-LSIG 1600A 3-Pole Fixed Air Circuit Breaker

Why Choose the ABB E3H1600 PR121/P-LSIG 1600A Air Circuit Breaker?

The ABB 1SDA056402R1 is a high-performance SACE Emax E3H air circuit breaker (ACB) designed for protection and switching of high-current low-voltage electrical distribution systems. Rated at 1600 A, this three-pole fixed circuit breaker incorporates ABB’s PR121/P-LSIG electronic overcurrent release for comprehensive protection of industrial, commercial and infrastructure power networks.

As part of the ABB SACE Emax range, the E3H1600 combines high short-circuit breaking performance with flexible electronic protection. The PR121/P-LSIG trip unit provides long-time, short-time, instantaneous and earth-fault protection functions, helping protect electrical installations against overloads, short circuits and earth faults.

The E3H1600 PR121/P-LSIG has a rated current of 1600 A, a rated operational voltage of up to 690 V AC and an ultimate short-circuit breaking capacity of 100 kA at 400 V AC. This version is supplied as a three-pole fixed circuit breaker with rear horizontal terminals, making it suitable for integration into low-voltage switchboards and power distribution assemblies.

Key Advantages

• High-performance ABB SACE Emax air circuit breaker for low-voltage power distribution.
• 1600 A rated current for demanding industrial and commercial installations.
• PR121/P-LSIG electronic overcurrent release providing comprehensive circuit protection.
• 100 kA ultimate short-circuit breaking capacity at 400 V AC.
• LSIG protection covers long-time overload, short-time short circuit, instantaneous short circuit and earth fault.
• Three-pole fixed construction with rear horizontal terminals for switchboard installation.

Key Features

• ABB SACE Emax E3H1600 air circuit breaker.
• 1600 A rated current.
• Three-pole fixed configuration.
• PR121/P-LSIG electronic overcurrent release.
• 690 V AC rated operational voltage.
• 100 kA Icu at 400 V AC.
• 85 kA Ics at 400 V AC.
• 75 kA short-time withstand current for 1 s.
• 12 kV rated impulse withstand voltage.
• 1000 V rated insulation voltage.
• Rear horizontal main terminals.
• Four auxiliary change-over contacts and circuit-breaker open/closed position indication.

Advanced Circuit Protection for Power Distribution

Air circuit breakers such as the ABB SACE Emax E3H1600 provide switching, isolation and protection for high-current low-voltage distribution circuits. Their high breaking capacity enables them to interrupt substantial fault currents, helping protect switchboards, cables and connected electrical equipment in demanding power distribution environments.

The PR121/P-LSIG electronic trip unit provides long-time overload, short-time short-circuit, instantaneous short-circuit and earth-fault protection. This makes the 1SDA056402R1 particularly suitable for main incomers, feeders and other critical circuits where dependable and configurable protection is required.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and feeder circuit protection.
• Manufacturing and process plants.
• Commercial and infrastructure electrical installations.
• Power distribution centres and switchgear assemblies.