S203M-Z50NA

Name: S203M-Z50NA
Brand: ABB
SKU: S203M-Z50NA

Product Description: The ABB S203M-Z50NA is a current-limiting miniature circuit breaker with two tripping mechanisms for enhanced safety. It is available in the Z characteristic and supports 50A rated current, ideal for various low-voltage applications.

Product ModelS203M-Z50NA

Material Number2CDS273103R0578

Product ID79886

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Advanced Tripping MechanismsThe S203M-Z50NA features both delayed thermal and electromechanical tripping mechanisms, ensuring reliable overload and short circuit protection.
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2. Comprehensive ComplianceThis MCB complies with IEC/EN 60898-1 and IEC/EN 60947-2 standards, making it suitable for residential, commercial, and industrial applications.
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3. High Breaking CapacityWith a breaking capacity of up to 10 kA at 230/400 V AC, the S203M-Z50NA provides robust short-circuit protection.
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4. Space-Saving DesignThe bottom-fitting auxiliary contact allows for a 50% reduction in space, making it ideal for compact installations.
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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

CSA 22.2 No. 235 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)