Why Choose the ABB S203MT-K25 Miniature Circuit Breaker?
The ABB S203MT-K25 is a reliable 3-pole miniature circuit breaker (MCB) designed for dependable overload and short circuit protection in railway, traction and demanding industrial applications. As part of the specialised ABB S200MT miniature circuit breaker series, it is engineered for installations where compact size, high breaking capacity and long-term operational reliability are essential.
This circuit breaker uses a delayed thermal tripping mechanism for overload protection and an electromagnetic tripping mechanism for short circuit protection. Its K characteristic tripping curve makes it suitable for circuits with higher inrush currents, including motors, transformers, auxiliary railway systems and industrial control equipment.
With a 25 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203MT-K25 provides robust protection for three-phase circuits. Its DIN rail mounted format supports quick installation in rolling stock electrical systems, distribution boards, control cabinets and machine panels.
Key Advantages
- Specialist 3-pole miniature circuit breaker for railway and industrial installations.
- 25 A rated current suitable for three-phase protection circuits.
- K characteristic tripping curve for circuits with higher inrush currents.
- 10 kA short circuit breaking capacity for dependable fault protection.
- Designed for traction and rolling stock applications.
- Compatible with ABB System pro M Compact accessories.
Key Features
- ABB S200MT railway miniature circuit breaker series.
- 25 A rated current.
- 3-pole configuration.
- K characteristic tripping curve.
- 10 kA rated short circuit breaking capacity.
- Thermal overload and electromagnetic short circuit protection.
- DIN rail mounting for modular electrical panels.
- Suitable for railway, traction, automation and industrial distribution systems.
Reliable Circuit Protection for Railway and Industrial Systems
The ABB S200MT range is designed especially for traction and railway applications, providing dependable protection in electrical systems exposed to demanding operational conditions. These miniature circuit breakers help protect conductors, equipment and control circuits from damage caused by overloads and short circuits.
The K curve characteristic of the S203MT-K25 provides a higher instantaneous trip threshold than standard general-purpose curves, making it well suited for inductive loads where temporary start-up currents may occur. This makes it a practical choice for motors, transformers, solenoids and railway auxiliary circuits.
Typical Applications
- Railway rolling stock electrical systems.
- Traction and transport control panels.
- Three-phase industrial distribution boards.
- Machine control panels.
- Automation and auxiliary power circuits.
- Motors, transformers and inductive loads.
