1SDA068064R1 ABB XT3N 250 TMD 160-1600 4p F F InN=50% Moulded Case Circuit Breaker

Why Choose the ABB XT3N 250 TMD 160-1600 4p F F InN=50% Circuit Breaker?

The ABB XT3N 250 TMD 160-1600 4p F F InN=50%, order code 1SDA068064R1, is a four-pole moulded case circuit breaker (MCCB) designed for dependable protection and switching in low-voltage electrical distribution systems. Part of the ABB SACE Tmax XT3 range, it combines a 250 A frame with a 160 A TMD thermomagnetic trip unit for industrial, commercial and infrastructure applications.

The TMD thermomagnetic release provides adjustable thermal overload protection together with magnetic short-circuit protection. Its thermal setting can be adjusted from 112–160 A, while the magnetic protection is set at 1600 A, providing straightforward circuit protection without requiring an electronic trip unit or auxiliary control power.

The XT3N configuration provides N short-circuit performance and a rated ultimate short-circuit breaking capacity of 36 kA at 380–415 V AC. Its four-pole construction includes a 50% rated neutral, while fixed mounting and front terminals make the breaker suitable for integration into distribution boards, switchboards and industrial control panels.

Key Advantages

• Reliable ABB Tmax XT3 moulded case circuit breaker for low-voltage distribution.
• 160 A TMD thermomagnetic release provides overload and short-circuit protection.
• Adjustable thermal overload setting from 112–160 A.
• 1600 A magnetic trip threshold for short-circuit protection.
• Four-pole configuration supports switching and protection in three-phase four-wire systems.
• 50% neutral rating for applications where a reduced neutral-current rating is appropriate.
• 36 kA Icu at 380–415 V AC for dependable fault interruption.
• Fixed construction with front terminals for practical switchboard installation.

Key Features

• ABB SACE Tmax XT3 series.
• XT3N 250 moulded case circuit breaker.
• 160 A rated trip current.
• 250 A frame size.
• Four-pole configuration.
• 50% rated neutral.
• TMD thermomagnetic trip unit.
• Adjustable thermal overload protection.
• Magnetic short-circuit protection.
• Thermal adjustment range of 112–160 A.
• Magnetic trip setting of 1600 A.
• N short-circuit performance level.
• Rated operational voltage up to 690 V AC.
• Fixed installation with front terminals.

Reliable Thermomagnetic Protection for Low-Voltage Distribution Systems

Thermomagnetic circuit breakers provide a robust method of protecting cables, feeders and distribution circuits against both sustained overloads and high-current short circuits. In the ABB XT3N 250, the thermal element responds to prolonged overcurrent conditions, while the magnetic element provides rapid operation when severe fault current reaches the specified short-circuit threshold.

For the 1SDA068064R1, the 112–160 A adjustable thermal range enables the overload setting to be coordinated with the protected circuit, while the 1600 A magnetic setting provides short-circuit protection. The four-pole configuration with a 50% neutral rating makes this version suitable for three-phase four-wire systems where the neutral conductor does not require the full phase-current rating.

Typical Applications

• Industrial low-voltage distribution boards.
• Commercial electrical switchboards.
• Three-phase four-wire distribution systems.
• Feeder and cable protection.
• Industrial machinery and control panels.
• Building-services electrical distribution.
• Infrastructure and utility installations.