A1B 125 TMF 125-1250 4p F F

Name: A1B 125 TMF 125-1250 4p F F
Brand: ABB
SKU: A1B 125 TMF 125-1250 4p F F

ABB A1B 125 TMF 125-1250 4p F F: High-performance, four-pole circuit breaker with thermomagnetic release, front terminals, and 125 A current rating. Ideal for reliable protection in electrical applications.

Product ModelA1B 125 TMF 125-1250 4p F F

Material Number1SDA066744R1

Product ID90437

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. High Breaking CapacityThe ABB A1B 125 TMF 125-1250 4p F F boasts a breaking capacity of 18 kA, ensuring it can handle high short-circuit currents effectively.
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2. Thermomagnetic ReleaseEquipped with a thermomagnetic release (TMF), this circuit breaker provides reliable protection by automatically tripping in case of overheating or excessive current.
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3. Front Terminal ConnectionThe front terminal connection type makes it easy to install and maintain, reducing the risk of errors and increasing efficiency.
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4. High Current RatingWith a current rating of 125 A, this circuit breaker is suitable for a wide range of electrical applications, from small to medium-sized installations.
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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

1SDL000183R0001 9AKK108467A6707

Product Net Width

101.6 mm

Product Net Height

130 mm

Product Net Depth / Length

60 mm

Product Net Weight

1 kg

Product Main Type

SACE FORMULA

5. Compliance with StandardsThe ABB A1B 125 TMF 125-1250 4p F F meets IEC standards, ensuring it adheres to international safety and performance criteria, providing peace of mind for users.

Moulded Case Circuit Breaker

Product Type

Automatic Circuit Breaker

Version

Electrical Durability

1500 cycle

Mechanical Durability

Nr. Operations 8500 cycle

Number of Poles

Opening Time

CB with SOR 15 ms CB with UVR 15 ms

Power Loss

at Rated Operating Conditions per Pole 11 W

Rated Current (In)

Main Circuit 125 A

Rated Impulse Withstand Voltage (Uimp)

6 kV

Rated Insulation Voltage (Ui)

690 V

Rated Operational Voltage

550 V AC 250 V DC

Rated Service Short-Circuit Breaking Capacity (Ics)

(240 V AC) 12.5 kA (380 V AC) 9 kA (415 V AC) 5 kA (440 V AC) 5 kA (480 V AC) 5 kA (500 V AC) 2.5 kA (250 V DC) 2 Poles in Series 2.5 kA

Rated Ultimate Short-Circuit Breaking Capacity (Icu)

(240 V AC) 25 kA (380 V AC) 18 kA (415 V AC) 18 kA (440 V AC) 15 kA (480 V AC) 10 kA (500 V AC) 5 kA (250 V DC) 5 kA

Rated Uninterrupted Current (Iu)

125 A

Release

TMF

Release Type

Short-Circuit Performance Level

Standards

IEC

Sub-type

Terminal Connection Type

Front

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

WEEE Category

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

eClass

V11.1 : 27370409

Manufacturer ID

1SDA066744R1