S203M-B1DC

Name: S203M-B1DC
Brand: ABB
SKU: S203M-B1DC

The ABB S203M-B1DC is a versatile miniature circuit breaker designed for DC applications. It provides reliable protection against overloads and short circuits, making it suitable for residential, commercial, and industrial use. Its compact design ensures easy installation in electrical distribution boards and consumer units.

Product ModelS203M-B1DC

Material Number2TAZ112300R0015

Product ID78868

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable ProtectionThe ABB S203M-B1DC offers robust protection against overloads and short circuits, ensuring the safety of your electrical system.
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2. Compact DesignIts compact and modular design allows for easy installation in electrical distribution boards, consumer units, and control panels.
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3. Versatile ApplicationSuitable for DC applications, this circuit breaker is ideal for residential, commercial, and industrial settings.
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4. Efficient OperationDesigned to automatically trip and disconnect the circuit when excessive current flows, preventing damage to the circuit and connected devices.
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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. Compliance with StandardsThe S203M-B1DC complies with IEC/EN 60898-2 and IEC/EN 60947-2 standards, ensuring it meets all major international and local standards for electrical safety.

Input Voltage Type

Rated Current (In)

1 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

2TAZ112300R0015