2CDS273446R0457 ABB S203MT-K15NA MCB 10 kA 3P+N Type K 15 A

Why Choose the ABB S203MT-K15NA Miniature Circuit Breaker?

The ABB S203MT-K15NA is a specialised three-pole plus neutral miniature circuit breaker (MCB) designed to protect electrical circuits against overload and short-circuit conditions in demanding traction, railway and rolling-stock applications. As part of the ABB S200MT series, it provides dependable circuit protection in a compact modular format developed for transport electrical systems.

The S200MT range is designed for applications where reliable electrical protection must be maintained under demanding operating conditions. Its traction-focused construction makes the series suitable for railway electrical distribution and control equipment, while its modular design supports straightforward integration into electrical cabinets, distribution assemblies and auxiliary systems.

With a rated current of 15 A, a Type K tripping characteristic, 3P+N configuration and 10 kA short-circuit breaking capacity, the S203MT-K15NA provides effective protection for three-phase circuits incorporating a neutral conductor. The Type K characteristic is particularly suited to circuits containing inductive loads that can produce elevated starting or inrush currents during normal operation.

Key Advantages

• Specialised miniature circuit breaker for railway and traction applications.
• 15 A rated current for dependable circuit protection.
• 3P+N configuration for three-phase circuits incorporating a neutral conductor.
• Type K tripping characteristic suited to loads with elevated starting and inrush currents.
• 10 kA short-circuit breaking capacity for robust fault protection.
• Compact modular construction for straightforward installation in electrical cabinets and distribution systems.

Key Features

• ABB S200MT miniature circuit breaker series.
• 15 A rated current.
• Three-pole plus neutral (3P+N) configuration.
• Type K tripping characteristic.
• 10 kA short-circuit breaking capacity.
• Protection against overload and short-circuit conditions.
• Designed for demanding traction and railway electrical installations.
• Suitable for circuits containing motors, transformers and other inductive loads.
• Compact modular format for distribution and control equipment.
• Part of ABB's dedicated traction circuit-protection range.

Reliable Circuit Protection for Railway and Traction Systems

Miniature circuit breakers such as the ABB S203MT-K15NA automatically interrupt an electrical circuit when excessive current occurs because of an overload or short circuit. This helps protect cables, conductors and connected electrical equipment against potentially damaging fault currents while allowing the circuit breaker to be reset after the fault has been identified and corrected.

The Type K characteristic is particularly useful for loads that can draw elevated current during normal start-up, such as motors, transformers and other inductive equipment. Combined with its 3P+N configuration and traction-focused S200MT design, the S203MT-K15NA provides a practical protection solution for three-phase railway and industrial circuits incorporating a neutral conductor.

Typical Applications

• Railway and rolling-stock electrical systems.
• Traction auxiliary electrical circuits.
• Three-phase circuits incorporating a neutral conductor.
• Motor and inductive-load circuit protection.
• Transformer and auxiliary equipment circuits.
• Train control and equipment cabinets.
• Railway distribution and protection panels.