XT3N 250 TMG 125-400 3p F F

Name: XT3N 250 TMG 125-400 3p F F
Brand: ABB
SKU: XT3N 250 TMG 125-400 3p F F

The ABB XT3N 250 TMG 125-400 3P FF is a high-performance, fixed three-pole circuit breaker with thermomagnetic release, ideal for generator and transformer protection. It features front terminals and meets IEC standards for reliability and safety.

Product ModelXT3N 250 TMG 125-400 3p F F

Material Number1SDA068254R1

Product ID83192

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable ProtectionThe XT3N 250 TMG 125-400 3P FF is designed to provide reliable protection against short circuits and overloads, ensuring the safety of your electrical system.
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2. High-PerformanceWith a rated current of 125-400 A, this circuit breaker is suitable for a wide range of applications, from small to medium-sized electrical installations.
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3. Thermomagnetic ReleaseThe thermomagnetic release mechanism ensures quick and efficient operation in case of a fault, minimizing downtime and ensuring continuous operation.
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4. Front Terminal ConnectionThe front terminal connection makes installation and maintenance easier, reducing the risk of errors and improving overall efficiency.
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Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Environmental Information

9AKK108467A6707

Product Net Width

105 mm

Product Net Height

150 mm

Product Net Depth / Length

70 mm

Product Net Weight

1.7 kg

Circuit Breaker Type to be Associated

Generator Protection

5. Compliance with IEC StandardsThe XT3N 250 TMG 125-400 3P FF meets all relevant IEC standards, ensuring compliance with international safety and performance requirements, thereby enhancing the credibility and reliability of your electrical setup.

Product Main Type

SACE Tmax XT

Product Name

Moulded Case Circuit Breaker

Product Type

Automatic Circuit Breaker

Version

CAD Dimensional Drawing

1SDH001295R0409

Connecting Capacity Main Circuit

Busbar 85..192 mmÂ²

Current Type

AC/DC

Electrical Durability

120 cycles per hour 8000 cycle

Mechanical Durability

240 cycles per hour 25000 cycle

Number of Poles

Opening Time

CB with SOR 15 ms CB with UVR 15 ms

Order Multiple

1 piece

Power Loss

at Rated Operating Conditions per Pole 6.6 W

Rated Current (In)

125 A

Rated Frequency (f)

50 / 60 Hz

Rated Impulse Withstand Voltage (Uimp)

8 kV

Rated Instantaneous Short-Circuit Current Setting (Ii)

400 A

Rated Insulation Voltage (Ui)

800 V

Rated Operational Voltage

690 V AC 500 V DC

Rated Service Short-Circuit Breaking Capacity (Ics)

(220 V AC) 50 kA (230 V AC) 50 kA (240 V AC) 50 kA (380 V AC) 27 kA (415 V AC) 36 kA (440 V AC) 19 kA (500 V AC) 15 kA (525 V AC) 9.75 kA (690 V AC) 3.75 kA (250 V DC) 2 Poles in Series 36 kA (500 V DC) 3 Poles in Series 50 kA

Rated Ultimate Short-Circuit Breaking Capacity (Icu)

(220 V AC) 50 kA (230 V AC) 50 kA (240 V AC) 50 kA (380 V AC) 36 kA (415 V AC) 36 kA (440 V AC) 36 kA (500 V AC) 20 kA (525 V AC) 13 kA (690 V AC) 5 kA (250 V DC) 2 Poles in Series 36 kA (500 V DC) 3 Poles in Series 50 kA

Rated Uninterrupted Current (Iu)

250 A

Rated Voltage (Ur)

690 V

Recommended Screw Driver

Main Circuit M8

Release

TMG

Release Type

Setting Range

87.5...125 A

Short-Circuit Performance Level

Standards

IEC60947-2

Sub-type

XT3

Terminal Connection Type

Front

Terminal Type

Bolt

Tightening Torque

8 NÂ·m

ETIM 8

EC000228 - Power circuit-breaker for trafo/generator/installation protection

ETIM 9

EC000228 - Power circuit-breaker for trafo/generator/installation protection

Object Classification Code

UNSPSC

39120000

WEEE Category

5. Small Equipment (No External Dimension More Than 50 cm)

eClass

V11.1 : 27370409

Manufacturer ID

1SDA068254R1