S203M-B4DC

Name: S203M-B4DC
Brand: ABB
SKU: S203M-B4DC

The ABB S203M-B4DC is a miniature circuit breaker designed for reliable protection. It features current limiting technology, delayed thermal tripping for overload protection, and electromechanical tripping for short circuits. Compliant with IEC/EN 60898-1 and IEC/EN 60947-2 standards, it is ideal for residential, commercial, and industrial applications.

Product ModelS203M-B4DC

Material Number2TAZ112300R0045

Product ID78961

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable ProtectionThe ABB S203M-B4DC offers robust protection against electrical faults, ensuring the safety of your equipment and personnel.
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2. Current Limiting TechnologyThis MCB limits the current during a fault, reducing the risk of damage to your electrical system.
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3. Versatile ApplicationsSuitable for residential, commercial, and industrial settings, this MCB provides a versatile solution for various electrical needs.
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4. Compliance with International StandardsMeets IEC/EN 60898-1 and IEC/EN 60947-2 standards, ensuring compatibility with global electrical systems.
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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

Standards

IEC/EN 60898-2 GB 10963 IEC/EN 60947-2 GB 14048

Tripping Characteristic

Rated Voltage (Ur)

440 V

Rated Operational Voltage

440 V DC

Rated Insulation Voltage (Ui)

440 V

Rated Impulse Withstand Voltage (Uimp)

4 kV

5. Efficient OperationDesigned with a bottom-fitting auxiliary contact, this MCB saves space and enhances operational efficiency in your electrical setup.

Input Voltage Type

Rated Current (In)

4 A

Rated Short-Circuit Capacity

(400 V) 10 kA

Rated Ultimate Short-Circuit Breaking Capacity (Icu)

(440 V DC) 10 kA

Rated Conditional Short-Circuit Current (Inc)

(400 V) 10 kA

Frequency (f)

0...0 Hz

Rated Frequency (f)

0-0 Hz

Energy Limiting Class

Number of Protected Poles

Number of Poles

Overvoltage Category

III

Release Type

Options Provided

DC application

Accessories Available

Yes

Connecting Capacity

Flexible 0 ... 25 mmÂ² Rigid 0 ... 35 mmÂ²

Ambient Temperature

-25...55 Â°C

Ambient Air Temperature

Operation -25...55 Â°C

Degree of Protection

IP20

Pollution Degree

Width in Number of Modular Spacings

Product Net Width

0.053 m

Product Net Height

0.088 m

Product Net Depth / Length

0.044 m

Product Net Weight

0.375 kg

Built-In Depth (t2)

69 mm

ETIM 8

EC000042 - Miniature circuit breaker (MCB)

ETIM 9

EC000042 - Miniature circuit breaker (MCB)

WEEE Category

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

WEEE B2C / B2B

Business To Business

CN8

85362010

eClass

V11.0 : 27141901

Object Classification Code

Manufacturer ID

2TAZ112300R0045