A1B 125 TMF 40-400 3p F F

Name: A1B 125 TMF 40-400 3p F F
Brand: ABB
SKU: A1B 125 TMF 40-400 3p F F

The A1B 125 TMF 40-400 3p F F is a reliable, three-pole moulded case circuit breaker with thermomagnetic release and front terminals. Ideal for transformer, generator, and installation protection, it offers high performance and safety.

Product ModelA1B 125 TMF 40-400 3p F F

Material Number1SDA066701R1

Product ID72228

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

1
Feature1. High-Performance Design The A1B 125 TMF 40-400 3p F F is engineered to provide exceptional performance in high-voltage applications, ensuring reliable operation and efficient energy management.
2
Feature2. Thermomagnetic Release Equipped with a thermomagnetic release (TMF), this circuit breaker automatically trips in case of an overload or short circuit, providing enhanced safety and protection.
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Feature3. Front Terminal Connection Featuring front terminals, the A1B 125 TMF 40-400 3p F F offers easy and convenient connection options, simplifying installation and maintenance processes.
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Feature4. Compliance with International Standards Designed to meet IEC standards, this circuit breaker ensures compliance with international safety and performance regulations, providing peace of mind for users.

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

76.2 mm

Product Net Height

130 mm

Product Net Depth / Length

60 mm

Product Net Weight

0.776 kg

Product Main Type

SACE FORMULA

Feature5. Durable Construction Built to withstand 1500 electrical cycles and 8500 mechanical operations, the A1B 125 TMF 40-400 3p F F is designed for long-lasting performance and durability in demanding environments.

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 4.5 W

Rated Current (In)

Main Circuit 40 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

1SDA066701R1