S203MT-K2NA

Name: S203MT-K2NA
Brand: ABB
SKU: S203MT-K2NA

The ABB S203MT-K25 is a 3-pole miniature circuit breaker designed for traction and railway applications. It features a high short-circuit breaking capacity, operates within a wide temperature range, and meets strict European standards for fire and smoke safety.

Product ModelS203MT-K2NA

Material Number2CDS273446R0277

Product ID77832

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. High Short-Circuit Breaking CapacityThe S203MT-K25 offers a high short-circuit breaking capacity, ensuring reliable protection in critical traction systems.
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2. Compliance with European StandardsMeets the European Fire & Smoke Standard (EN 45545-2) and shock and vibration standards (IEC/EN 61373), making it suitable for rolling stock installations.
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3. Extreme Temperature OperationOperates reliably from -40°C to +70°C, making it ideal for harsh environments.
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4. Compact DesignDesigned for space efficiency, allowing for easy integration into compact systems.
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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, CSA 22.2 No. 235

Tripping Characteristic

Rated Voltage (Ur)

440 V

Rated Operational Voltage

acc. to IEC 60898-1 440 V acc. to IEC 60947-2 230 V

Operational Voltage

Maximum (Incl. Tolerance) 253 V AC Maximum (Incl. Tolerance) 66 V DC Minimum 12 V AC Minimum 12 V DC

Rated Insulation Voltage (Ui)