S203-B2

Name: S203-B2
Brand: ABB
SKU: S203-B2

The ABB S203-B2 is a compact, current-limiting miniature circuit breaker designed for residential, commercial, and industrial applications. It features two tripping mechanisms for overload and short circuit protection, with breaking capacities up to 6 kA at 230/400 V AC.

Product ModelS203-B2

Material Number2CDS253001R0025

Product ID78314

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Current Limiting DesignThe S203-B2 is designed to limit the current during a fault, reducing the risk of damage to the circuit and ensuring a safer operation.
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2. Dual Tripping MechanismsIt features two different tripping mechanisms: delayed thermal tripping for overload protection and electromechanical tripping for short circuit protection, providing comprehensive protection for your electrical system.
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3. Compact and Space-SavingThe bottom-fitting auxiliary contact can be mounted on the S200 series, saving 50% of space in your electrical panel.
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4. Compliance with International StandardsThe S203-B2 complies with IEC/EN 60898-1, IEC/EN 60947-2, and UL1077, ensuring it meets the highest standards for safety and performance in residential, commercial, and industrial applications.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Standards

IEC/EN 60898-1 IEC/EN 60947-2 UL 1077

Tripping Characteristic

Rated Operational Voltage

acc. to IEC 60898-1 400 V AC acc. to IEC 60898-1 400 V acc. to IEC 60947-2 440 V AC

Operational Voltage

Maximum (Incl. Tolerance) 440 V AC Minimum 12 V AC Minimum 12 V DC

Rated Insulation Voltage (Ui)

acc. to IEC/EN 60664-1 440 V

Rated Impulse Withstand Voltage (Uimp)