Why Choose the ABB S203MT-K2NA Miniature Circuit Breaker?
The ABB S203MT-K2NA is a specialist miniature circuit breaker (MCB) from the ABB System pro M Compact S200MT series, designed for traction, railway and demanding industrial electrical applications. Featuring a K characteristic trip curve, it provides dependable overload and short circuit protection for circuits with higher inrush currents.
The S200MT range is engineered for transport environments where reliability, compact installation and electrical safety are essential. This MCB combines delayed thermal overload protection with electromechanical short circuit protection, helping protect electrical circuits in rolling stock, rail infrastructure and specialist industrial control panels.
With a rated current of 2 A, a 3P+N configuration and a 10 kA breaking capacity, the S203MT-K2NA is ideal for low-current three-phase circuits requiring neutral switching in traction, railway and specialist industrial installations.
Key Advantages
- Specialist miniature circuit breaker designed for traction and railway applications.
- 2 A rated current for precision low-current circuit protection.
- K characteristic trip curve suitable for motors, transformers and inductive loads.
- 3P+N configuration with three protected poles and switched neutral.
- 10 kA breaking capacity for dependable short circuit protection.
- DIN rail mounting for fast installation within electrical panels and distribution boards.
Key Features
- ABB System pro M Compact S200MT series.
- 2 A rated current.
- K curve tripping characteristic.
- 3P+N pole configuration.
- 10 kA rated short circuit breaking capacity.
- Designed specifically for traction and railway environments.
- Thermal overload and electromechanical short circuit protection.
- Compatible with ABB System pro M Compact accessories.
Reliable Circuit Protection for Traction and Railway Systems
The ABB S203MT-K2NA automatically disconnects electrical circuits during overloads and short circuits. Its thermal tripping mechanism protects against prolonged overload conditions, while the electromechanical mechanism reacts rapidly to fault currents, helping reduce equipment damage and minimise downtime.
The K characteristic is designed for applications with higher inrush currents than standard C curve devices, making it suitable for inductive loads, motor circuits, transformers and specialist railway equipment.
Typical Applications
- Railway and traction electrical systems.
- Rolling stock distribution panels.
- Control transformer protection.
- Motor and inductive load circuits.
- Industrial control panels.
- Electrical installations requiring neutral switching.
