1SDA125204R1 ABB E4.3V 4000 Ekip Aware LI 4-Pole Fixed Air Circuit Breaker

Why Choose the ABB 1SDA125204R1 E4.3V 4000 Ekip Aware Air Circuit Breaker?

The ABB 1SDA125204R1, product designation E4.3V 4000 Ekip Aware LI 4p FHR, is a high-performance four-pole fixed air circuit breaker (ACB) designed for protection and switching in demanding low-voltage power distribution systems. As part of the advanced ABB SACE Emax 3 series, it combines the high-performance E4.3V breaker frame with the intelligent Ekip Aware electronic trip unit for dependable protection and electrical-system monitoring.

With a rated current of 4000 A, the breaker provides LI protection functions, combining long-time overload protection with instantaneous short-circuit protection. The E4.3V performance level provides a rated ultimate short-circuit breaking capacity of 150 kA at 440 V AC and a rated short-time withstand current of 100 kA for 1 s, making it particularly suitable for high-fault-level power distribution systems.

The 1SDA125204R1 is supplied in a four-pole fixed configuration with orientable rear terminals (HR). This robust arrangement supports permanent installation in high-current switchboards, while the Ekip Aware trip unit provides intelligent electronic protection for industrial, commercial, infrastructure and critical-power applications.

Key Advantages

• High-performance ABB SACE Emax 3 air circuit breaker for demanding low-voltage distribution.
• 4000 A rated current for high-power electrical systems.
• Advanced Ekip Aware electronic trip unit for intelligent circuit protection.
• LI protection functions provide long-time overload and instantaneous short-circuit protection.
• High 150 kA ultimate breaking capacity at 440 V AC.
• 100 kA short-time withstand current for 1 s.
• Four-pole fixed configuration for permanent switchboard installation.
• Orientable rear terminals (HR) provide flexible high-current connections.

Key Features

• ABB SACE Emax 3 E4.3V series.
• 4000 A rated current.
• Ekip Aware LI electronic protection release.
• Long-time (L) overload protection.
• Instantaneous (I) short-circuit protection.
• Four-pole (4P) construction.
• Fixed (F) circuit-breaker execution.
• Orientable rear terminals (HR).
• 150 kA Icu at 440 V AC.
• 100 kA Icw for 1 s.
• Ekip electronic release technology for accurate protection and system supervision.
• Designed for high-current low-voltage switchboards and power-distribution assemblies.

High-Performance Protection with Ekip Aware

The ABB Ekip Aware platform brings intelligent electronic protection to the SACE Emax 3 range. In this LI configuration, the release provides long-time protection against sustained overload conditions together with instantaneous protection against severe short circuits, helping safeguard conductors, switchgear and connected equipment throughout low-voltage distribution networks.

The E4.3V performance level is engineered for installations with particularly high prospective fault currents. With an ultimate short-circuit breaking capacity of 150 kA at 440 V AC and a short-time withstand capability of 100 kA for 1 s, the 1SDA125204R1 provides robust protection for major incoming feeders, bus sections and high-power distribution circuits.

Typical Applications

• Industrial low-voltage power distribution systems.
• Main incoming and high-current feeder circuits.
• Bus-section and switchboard distribution applications.
• Commercial building power distribution.
• Manufacturing and process-industry installations.
• Data centres and critical-power infrastructure.
• Generator and transformer distribution circuits.
• OEM switchgear and high-current power-distribution assemblies.