1SDA054239R1 ABB T4L 250 TMA 125-1250 4P F F Moulded Case Circuit Breaker 125 A

Why Choose the ABB T4L 250 TMA 125-1250 4P F F Circuit Breaker?

The ABB 1SDA054239R1 is a high-performance SACE Tmax T4L moulded case circuit breaker (MCCB) designed for dependable protection and switching in industrial and commercial low-voltage electrical distribution systems. Part of the established ABB SACE Tmax T4 series, this four-pole circuit breaker combines a 250 A frame with a 125 A TMA thermomagnetic trip unit.

The TMA release provides adjustable thermal overload protection together with adjustable instantaneous magnetic short-circuit protection. Its magnetic protection range of 625–1,250 A allows the instantaneous trip threshold to be matched to the requirements of the protected circuit, helping provide effective protection against severe fault currents while accommodating normal operating conditions.

With a 125 A rated current, four-pole construction, fixed installation and front terminals, the T4L 250 TMA 125-1250 is designed for straightforward integration into low-voltage switchboards and distribution panels. The T4L performance level provides an ultimate short-circuit breaking capacity of 120 kA at 400 V AC, making this MCCB suitable for demanding installations with high prospective fault currents.

Key Advantages

• High-performance ABB SACE Tmax T4L moulded case circuit breaker.
• 125 A rated current for industrial and commercial circuit protection.
• Four-pole configuration provides switching and protection across four conductors.
• TMA thermomagnetic trip unit provides overload and short-circuit protection.
• Adjustable instantaneous magnetic protection range of 625–1,250 A.
• High ultimate short-circuit breaking capacity of 120 kA at 400 V AC.
• 690 V AC rated operational voltage for low-voltage distribution applications.
• Fixed installation with front terminals for convenient switchboard integration.

Key Features

• ABB SACE Tmax T4 series.
• T4L 250 frame with L breaking-capacity performance level.
• 125 A rated trip-unit current.
• 250 A frame rated uninterrupted current.
• 4-pole circuit breaker configuration.
• TMA thermomagnetic release.
• Adjustable thermal overload protection.
• 625–1,250 A adjustable instantaneous magnetic protection.
• 120 kA Icu at 400 V AC.
• 690 V AC rated voltage.
• Fixed circuit-breaker construction with front terminals.
• Designed for demanding low-voltage power distribution systems.

Reliable Circuit Protection for Power Distribution

Moulded case circuit breakers such as the ABB SACE Tmax T4L protect electrical distribution circuits against overloads and short circuits while also providing a practical means of switching and isolation. The TMA thermomagnetic release uses thermal protection for sustained overload conditions and magnetic protection for rapid interruption of high short-circuit currents.

The four-pole configuration makes the 1SDA054239R1 suitable for distribution systems requiring four-pole circuit interruption, while the adjustable magnetic trip range provides additional flexibility when coordinating protection with downstream equipment. Its high T4L breaking capacity makes it particularly suitable for industrial switchboards and distribution systems where substantial prospective fault currents may be present.

Typical Applications

• Industrial low-voltage power distribution systems.
• Four-pole electrical distribution circuits.
• Electrical switchboards and distribution panels.
• Industrial feeder and sub-distribution protection.
• Manufacturing and process plant electrical systems.
• Commercial and infrastructure power distribution.
• Machine and production-line electrical panels.
• Installations with high prospective short-circuit currents.