S203M-B40NA

Name: S203M-B40NA
Brand: ABB
SKU: S203M-B40NA

The ABB S203M-B40NA miniature circuit breaker provides reliable protection for your electrical system. It features a failsafe bi-directional cylinder-lift terminal and high interrupting ratings, making it suitable for residential, commercial, and industrial applications.

Product ModelS203M-B40NA

Material Number2CDS273103R0405

Product ID79989

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Reliable ProtectionThe ABB S203M-B40NA offers robust protection against overcurrents and short circuits, ensuring the safety of your electrical system.
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2. Flexible ApplicationDesigned for both DC and AC applications, this miniature circuit breaker is versatile and can be used in a variety of settings, from residential to industrial environments.
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3. High Interrupting RatingsWith interrupting ratings of 6 kA (DC) and 10 kA, this circuit breaker can handle high current surges, providing reliable operation under demanding conditions.
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4. Easy InstallationThe failsafe bi-directional cylinder-lift terminal makes installation and maintenance straightforward, ensuring quick and efficient setup.

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 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)