Why Choose the ABB S203MT-K1 Miniature Circuit Breaker?
The ABB S203MT-K1 is a durable and compact 3-pole miniature circuit breaker (MCB) designed for dependable overcurrent and short-circuit protection in traction, railway and industrial control applications. As part of the specialist ABB S200MT miniature circuit breaker range, it is engineered for demanding environments where safety, reliability and consistent circuit protection are essential.
This MCB combines delayed thermal overload protection with an electromechanical short-circuit trip mechanism. The K characteristic is suitable for circuits with higher inrush currents, helping prevent nuisance tripping while maintaining effective protection for cables, control equipment and auxiliary electrical systems.
With a rated current of 1 A, a 3-pole configuration and a rated breaking capacity of 10 kA, the S203MT-K1 is well suited to low-current three-phase circuits used in control panels, signalling systems, automation equipment and transport-related installations. Its modular DIN rail design allows straightforward installation in electrical cabinets and distribution boards.
Key Advantages
- Compact 3-pole miniature circuit breaker for traction and railway applications.
- 1 A rated current for low-current circuit protection.
- K curve tripping characteristic suitable for circuits with higher inrush currents.
- 10 kA breaking capacity for reliable short-circuit protection.
- Current limiting class 3 performance helps protect downstream components.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200MT miniature circuit breaker series.
- 3-pole MCB configuration.
- 1 A rated current.
- K characteristic tripping curve.
- 10 kA rated short-circuit breaking capacity.
- Thermal and electromagnetic trip mechanisms.
- Designed for demanding traction and railway applications.
- DIN rail mounting for control panels and distribution boards.
Reliable Circuit Protection for Traction and Control Systems
Miniature circuit breakers such as the ABB S203MT-K1 protect electrical circuits by automatically disconnecting the supply during overload or short-circuit conditions. This helps reduce the risk of cable damage, equipment failure and unsafe operating conditions in critical control systems.
The ABB S200MT range is designed especially for traction and railway environments, offering robust protection for auxiliary, signalling and control circuits. Its compact modular construction, high breaking capacity and accessory compatibility make it a practical choice for engineers building reliable electrical protection panels.
Typical Applications
- Railway and traction electrical systems.
- Rolling stock control panels.
- Three-phase auxiliary circuits.
- Industrial control cabinets.
- Automation and signalling systems.
- Low-current motor control and protection circuits.
