A1B 125 TMF 20-400 4p F F

Name: A1B 125 TMF 20-400 4p F F
Brand: ABB
SKU: A1B 125 TMF 20-400 4p F F

The ABB A1B 125 TMF 20-400 4P FF circuit breaker is a high-performance, four-pole device with front terminals and a thermomagnetic release. It provides reliable power protection for a wide range of applications.

Product ModelA1B 125 TMF 20-400 4p F F

Material Number1SDA066734R1

Product ID92664

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable Power ProtectionThe ABB A1B 125 TMF 20-400 4P FF circuit breaker ensures reliable power protection with its advanced thermomagnetic release mechanism, ensuring safe and efficient operation in various electrical systems.
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2. High PerformanceDesigned to handle high currents, this circuit breaker is ideal for applications requiring robust electrical performance, making it a trusted choice for industrial and commercial settings.
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3. Front Terminal ConnectionEquipped with front terminals, the ABB A1B 125 TMF 20-400 4P FF circuit breaker offers easy and convenient installation, reducing setup time and enhancing user experience.
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4. Thermomagnetic Release (TMF)The thermomagnetic release mechanism provides a reliable and efficient way to interrupt electrical currents in case of an overload or short circuit, ensuring the safety of the electrical system and its components.

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 IEC StandardsThe ABB A1B 125 TMF 20-400 4P FF circuit breaker is designed to meet the stringent standards set by the International Electrotechnical Commission (IEC), ensuring compliance with global electrical safety regulations and standards.

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 3 W

Rated Current (In)

Main Circuit 20 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

1SDA066734R1