S203-B4NA

Name: S203-B4NA
Brand: ABB
SKU: S203-B4NA

The ABB S203-B4NA is a compact, current limiting miniature circuit breaker designed for delayed thermal tripping and resistant to magnetic start-up currents. Suitable for control circuits and lighting applications.

Product ModelS203-B4NA

Material Number2CDS253103R0045

Product ID78692

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Compact DesignThe S203-B4NA offers a compact solution, making it easy to integrate into various electrical systems without taking up excessive space.
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2. Current LimitingThis circuit breaker is current limiting, ensuring that it can handle high currents while protecting your system from damage.
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3. Delayed Thermal TrippingThe delayed thermal tripping mechanism provides a safe and reliable shutdown in case of an overload, preventing damage to the circuit.
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4. Resistant to Magnetic Start-Up CurrentsDesigned to handle medium magnetic start-up currents, making it suitable for applications like lighting and control panels.
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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 60898-1 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

Rated Insulation Voltage (Ui)

acc. to IEC/EN 60664-1 440 V

Rated Impulse Withstand Voltage (Uimp)

4 kV at 2000 m 5 kV at Sea Level 6.2 kV