1SDA075204R1 ABB XT4S 250 TMA 250 1250-2500 3P UL/CSA MCCB

Why Choose the ABB XT4S 250 TMA 1SDA075204R1 Circuit Breaker?

The ABB XT4S 250 TMA 1SDA075204R1 is a high-performance three-pole moulded case circuit breaker (MCCB) designed for low-voltage power distribution protection in UL/CSA applications. Part of the ABB SACE Tmax XT4 range, it combines a 250 A frame with a 250 A TMA adjustable thermomagnetic trip unit.

The TMA release provides adjustable thermal overload protection together with adjustable instantaneous magnetic short-circuit protection. On this model, the thermal overload setting can be adjusted from 175–250 A, while the instantaneous magnetic setting is adjustable from 1,250–2,500 A, allowing the protection characteristics to be coordinated with the requirements of the protected circuit.

The 1SDA075204R1 is supplied as a fixed, three-pole circuit breaker with front terminals. The XT4S performance level provides a 35 kA interruption rating at 480 V AC, while the breaker is rated for 600 V, making it suitable for industrial, commercial and OEM distribution systems requiring adjustable thermomagnetic protection and substantial short-circuit performance.

Key Advantages

• High-performance ABB SACE Tmax XT4S moulded case circuit breaker.
• 250 A TMA adjustable thermomagnetic trip unit for overload and short-circuit protection.
• Adjustable thermal overload range of 175–250 A.
• Adjustable instantaneous magnetic range of 1,250–2,500 A.
• 35 kA interruption rating at 480 V AC for demanding distribution applications.
• Fixed three-pole construction with front terminals for practical switchboard and panel integration.

Key Features

• ABB SACE Tmax XT4S 250 moulded case circuit breaker.
• 250 A rated current (In).
• 250 A rated uninterrupted current (Iu).
• Three-pole configuration.
• TMA adjustable thermomagnetic release.
• Adjustable thermal overload protection.
• Adjustable instantaneous magnetic short-circuit protection.
• 175–250 A thermal adjustment range.
• 1,250–2,500 A instantaneous magnetic adjustment range.
• S short-circuit performance level.
• 35 kA interruption rating at 480 V AC.
• 600 V rated voltage.
• Fixed installation construction.
• Front terminals for main circuit connections.
• Designed for UL/CSA low-voltage distribution applications.

Adjustable TMA Thermomagnetic Circuit Protection

The TMA thermomagnetic trip unit provides adjustable thermal and magnetic protection without requiring electronic trip-unit programming. The thermal element on the 1SDA075204R1 can be set between 175 A and 250 A, equivalent to approximately 0.7–1.0 times the 250 A rated current. This allows the overload protection threshold to be matched more closely to the protected conductors and equipment.

The instantaneous magnetic release is independently adjustable from 1,250–2,500 A, corresponding to 5–10 times the 250 A rated current. Combined with the XT4S 35 kA interruption rating at 480 V AC, this adjustable protection makes the breaker well suited to feeders, distribution circuits and equipment where both overload coordination and high-current short-circuit protection are required.

Typical Applications

• Industrial low-voltage power distribution systems.
• Commercial electrical distribution switchboards.
• Three-phase feeder and branch circuit protection.
• Industrial machinery and production equipment.
• Applications requiring adjustable overload protection.
• Circuits requiring adjustable instantaneous magnetic protection.
• UL/CSA switchboards and distribution panels.
• OEM electrical equipment and panel-building applications.