S203M-Z1DC

Name: S203M-Z1DC
Brand: ABB
SKU: S203M-Z1DC

The ABB S203M-Z1 is a compact, current-limiting miniature circuit breaker designed for 3-phase applications. It features two tripping mechanisms for overload and short circuit protection, ensuring reliable operation in residential, commercial, and industrial settings. Compliant with IEC/EN 60898-1 and IEC/EN 60947-2 standards, this MCB offers high breaking capacities and is available in various configurations.

Product ModelS203M-Z1DC

Material Number2TAZ112300R0218

Product ID78526

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable ProtectionThe S203M-Z1 features two tripping mechanisms – delayed thermal for overload protection and electromechanical for short circuit protection, ensuring reliable and efficient operation.
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2. Compliance with StandardsCompliant with IEC/EN 60898-1 and IEC/EN 60947-2 standards, this MCB meets the highest safety and performance requirements for residential, commercial, and industrial applications.
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3. High Breaking CapacitiesWith breaking capacities up to 10 kA at 230/400 V AC, the S203M-Z1 provides robust protection against short circuits, ensuring the safety of your electrical system.
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4. Compact DesignDesigned for DIN rail mounting, the S203M-Z1 is compact and space-efficient, allowing for easy installation and integration into your electrical panel.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Standards

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. Versatile ConfigurationsAvailable in various configurations (1P, 1P+N, 2P, 3P, 3P+N, 4P), this MCB can be easily adapted to meet the specific needs of your electrical setup, whether it's residential, commercial, or industrial.

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

Power Loss

7.35 W

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

2TAZ112300R0218