XT3N 250 TMG 125-400 4p F F InN=100%

Name: XT3N 250 TMG 125-400 4p F F InN=100%
Brand: ABB
SKU: XT3N 250 TMG 125-400 4p F F InN=100%

Short Description: ABB's XT3N 250 TMG 125-400 4 pole circuit breaker features a thermomagnetic release, front terminals, and is fully rated neutral, ensuring reliable operation in generator protection and power distribution systems.

Product ModelXT3N 250 TMG 125-400 4p F F InN=100%

Material Number1SDA068261R1

Product ID86492

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. High Reliability and DurabilityThe XT3N 250 TMG is designed to withstand 120 cycles per hour and 8,000 cycles, ensuring long-lasting performance in demanding electrical environments.
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2. Thermomagnetic ReleaseEquipped with a thermomagnetic release (TMG), this circuit breaker provides reliable tripping under both thermal and magnetic conditions, ensuring safe operation.
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3. Generator ProtectionSpecifically designed for generator protection, the XT3N 250 TMG offers enhanced safety features to protect against short circuits and overcurrents.
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4. Front Terminal ConnectionThe front terminal connection makes installation and maintenance easier, reducing downtime and increasing 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

140 mm

Product Net Height

150 mm

Product Net Depth / Length

70 mm

Product Net Weight

2.1 kg

Circuit Breaker Type to be Associated

Generator Protection

5. IEC ComplianceMeets IEC standards, ensuring compliance with international safety regulations and providing a high level of reliability in various electrical applications.

Product Main Type

SACE Tmax XT

Product Name

Moulded Case Circuit Breaker

Product Type

Automatic Circuit Breaker

Version

CAD Dimensional Drawing

1SDH001295R0483

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

1SDA068261R1