1SDA070821R1 ABB E1.2B 1250 Ekip Dip LI 3p F F Air Circuit Breaker

Why Choose the ABB E1.2B 1250 Ekip Dip LI 3p F F Air Circuit Breaker?

The ABB E1.2B 1250 Ekip Dip LI 3p F F, order code 1SDA070821R1, is a high-performance SACE Emax 2 air circuit breaker (ACB) designed for reliable protection and switching of low-voltage AC power distribution systems. Part of the advanced ABB Emax 2 E1.2 series, this model combines a compact frame with electronic protection for demanding industrial and commercial electrical installations.

This configuration is a fixed, three-pole circuit breaker with front terminals and an Ekip Dip LI solid-state electronic trip unit. The LI protection functions provide long-time overload and instantaneous short-circuit protection, helping safeguard cables, busbars and downstream electrical equipment against damaging overcurrent conditions.

With a rated current of 1250 A, rated operational voltage up to 690 V AC and a rated ultimate short-circuit breaking capacity of 42 kA at 400 V AC, the E1.2B 1250 is engineered for robust power distribution. This version is also supplied with four auxiliary contacts and circuit-breaker open/closed position indication for integration into switchboards and control systems.

Key Advantages

• High-performance ABB SACE Emax 2 air circuit breaker for low-voltage distribution.
• 1250 A rated current for high-current power distribution applications.
• Ekip Dip LI electronic trip unit provides overload and instantaneous short-circuit protection.
• Three-pole fixed configuration for permanent switchboard installation.
• Front terminals support practical switchboard connection arrangements.
• 42 kA breaking capacity at 400 V AC provides robust fault interruption capability.
• Supplied with four auxiliary contacts for signalling and control integration.
• Designed as part of ABB's compact Emax 2 E1.2 platform.

Key Features

• ABB SACE Emax 2 E1.2B series.
• 1250 A rated current (In).
• 1250 A rated uninterrupted current (Iu).
• Three-pole configuration.
• Fixed version with front terminal connections.
• Ekip Dip LI solid-state electronic release.
• Long-time L overload protection.
• Instantaneous I short-circuit protection.
• 690 V AC rated operational voltage.
• 42 kA Icu at 400 V AC.
• 42 kA Ics at 400 V AC.
• 42 kA Icw for 1 s.
• Supplied with four auxiliary contacts.
• Circuit-breaker open/closed position indication.

Reliable Circuit Protection for Power Distribution

Air circuit breakers such as the ABB Emax 2 E1.2B protect low-voltage distribution systems by automatically interrupting current when abnormal electrical conditions occur. The electronic Ekip Dip LI release continuously supports protection against sustained overloads and high-level short circuits, helping reduce the risk of damage to conductors, busbars and connected equipment.

The E1.2B platform combines high current-carrying capability with a compact architecture suitable for modern low-voltage switchboards. Its fixed three-pole construction, front terminals, auxiliary signalling contacts and electronic protection make the 1SDA070821R1 particularly suitable for incomer, feeder and distribution duties where dependable circuit protection and straightforward system integration are required.

Typical Applications

• Low-voltage main distribution switchboards.
• Industrial power distribution systems.
• Main incomer and feeder circuit protection.
• Commercial and infrastructure electrical distribution.
• Manufacturing and process plant switchgear.
• Power distribution centres and electrical control rooms.
• Protection of high-current busbars and distribution feeders.
• OEM switchboards and panel-building applications.