1SDA071845R1 ABB E4.2H 4000 Ekip Touch LSI 4P FHR Air Circuit Breaker

Why Choose the ABB 1SDA071845R1 Emax 2 Air Circuit Breaker?

The ABB 1SDA071845R1 is a high-performance SACE Emax 2 E4.2H air circuit breaker designed for protection and switching in demanding low-voltage power distribution systems. Configured as an E4.2H 4000 Ekip Touch LSI 4p FHR, it combines a rated uninterrupted current of 4000 A with ABB's advanced Ekip Touch LSI solid-state electronic trip unit.

This four-pole fixed circuit breaker provides comprehensive LSI protection functions, covering long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. The Ekip Touch release provides configurable electronic protection through an intuitive interface, supporting selective coordination and dependable protection in sophisticated industrial, commercial and infrastructure distribution systems.

With an E4.2H high-performance frame, the 1SDA071845R1 provides a rated ultimate short-circuit breaking capacity of 100 kA at 400–440 V AC and 85 kA at 500–690 V AC, together with a rated short-time withstand current of 85 kA for 1 s. Its fixed four-pole construction features rear flat horizontal terminals and four change-over auxiliary contacts for integration into high-current switchboards.

Key Advantages

• High-performance ABB SACE Emax 2 E4.2H air circuit breaker for demanding low-voltage distribution systems.
• 4000 A rated uninterrupted current for high-current electrical installations.
• 100 kA ultimate short-circuit breaking capacity at 400–440 V AC.
• 85 kA short-time withstand current for 1 s for robust fault-current performance.
• Advanced Ekip Touch LSI electronic trip unit for adjustable overload and short-circuit protection.
• Four-pole fixed configuration with rear flat horizontal terminals for switchboard integration.

Key Features

• ABB SACE Emax 2 E4.2H series.
• 4000 A rated uninterrupted current (Iu).
• Four-pole configuration with 100% neutral pole current.
• Fixed mounting construction.
• Rear flat horizontal terminals (FHR).
• Ekip Touch LSI solid-state electronic trip unit.
• LSI protection for long-time overload, short-time delayed short-circuit and instantaneous short-circuit conditions.
• 690 V AC rated operational voltage.
• 100 kA Icu at 400–440 V AC and 85 kA Icu at 500–690 V AC.
• Suitable for use on 690 V IT networks.

Advanced LSI Protection for Low-Voltage Power Distribution

Air circuit breakers such as the ABB SACE Emax 2 protect high-current low-voltage electrical networks against overloads and short circuits while providing switching and isolation functions within power distribution assemblies. The E4.2H frame combines a 4000 A continuous-current rating with high fault interruption and short-time withstand capability for demanding industrial, commercial and infrastructure installations.

The Ekip Touch LSI electronic trip unit provides configurable long-time overload, short-time delayed short-circuit and instantaneous short-circuit protection. Combined with the robust Emax 2 architecture, the 1SDA071845R1 provides dependable protection for main distribution switchboards, high-current feeders and electrical systems requiring high breaking capacity, selective coordination and advanced electronic protection.

Typical Applications

• Main incoming protection for low-voltage switchboards.
• Industrial power distribution systems.
• High-current feeder protection.
• Manufacturing and process industry electrical systems.
• Commercial and infrastructure power distribution.
• Installations requiring configurable short-circuit selectivity and high breaking capacity.