Why Choose the ABB S203MT-K63NA Miniature Circuit Breaker?
The ABB S203MT-K63NA is a high-performance 3P+N miniature circuit breaker (MCB) designed for railway, traction, rolling stock and demanding industrial electrical installations. Part of the specialist ABB S200MT miniature circuit breaker range, it provides reliable protection against overloads and short circuits in critical low voltage circuits.
Featuring a K tripping characteristic, the S203MT-K63NA is well suited to circuits with higher inrush currents, including motors, transformers and inductive loads. Its current limiting construction helps reduce fault energy, protecting cables, equipment and connected devices during short circuit conditions.
With a rated current of 63 A, a 3P+N configuration and a 10 kA breaking capacity, this ABB miniature circuit breaker is ideal for three-phase systems with neutral switching. The compact DIN rail mounted design allows efficient installation within electrical distribution boards, switchgear assemblies and industrial control panels.
Key Advantages
- High quality ABB S200MT miniature circuit breaker.
- 63 A rated current for demanding three-phase protection.
- K characteristic suitable for circuits with high inrush currents.
- 3P+N configuration with three protected poles and switched neutral.
- 10 kA breaking capacity for dependable short circuit protection.
- Designed for railway, traction, industrial and commercial installations.
Key Features
- ABB S200MT series.
- 63 A rated current.
- K tripping characteristic.
- 3 protected poles plus neutral.
- 10 kA rated breaking capacity.
- Current limiting miniature circuit breaker design.
- Thermal overload and magnetic short circuit protection.
- DIN rail mounting compatible with ABB System pro M Compact accessories.
Reliable Circuit Protection for Railway and Industrial Systems
The ABB S203MT-K63NA combines delayed thermal overload protection with electromechanical magnetic short circuit protection. This provides dependable disconnection under fault conditions while supporting safe, reliable operation of electrical circuits in demanding environments.
The S200MT range has been developed especially for traction and railway applications, offering robust construction, compact installation and compatibility with ABB System pro M Compact accessories for flexible panel design.
Typical Applications
- Railway and rolling stock electrical systems.
- Traction power and auxiliary circuits.
- Industrial distribution boards.
- Motor and transformer circuits with high inrush current.
- Electrical control panels and switchboards.
- Commercial and infrastructure electrical installations.
