Why Choose the ABB S203MT-C20 Miniature Circuit Breaker?
The ABB S203MT-C20 is a high-performance 3-pole miniature circuit breaker (MCB) from the specialist ABB S200MT series. It has been specifically developed for railway, traction and demanding industrial applications, delivering dependable overload and short circuit protection in environments where reliability, vibration resistance and long service life are essential.
Featuring a C characteristic tripping curve, the S203MT-C20 is ideal for circuits with moderate inrush currents, including auxiliary railway systems, control panels, industrial automation equipment and OEM machinery. ABB's current limiting technology reduces fault energy, while proven thermal and magnetic tripping mechanisms ensure reliable circuit protection throughout the product's operating life.
With a 20 A rated current, 3 protected poles, 10 kA rated breaking capacity and compact DIN rail mounting, the ABB S203MT-C20 is an excellent choice for protecting three-phase electrical circuits within railway vehicles, transport infrastructure and industrial control systems.
Key Advantages
- Designed specifically for railway and traction applications.
- 20 A rated current for dependable circuit protection.
- C characteristic suitable for moderate inrush current loads.
- 10 kA breaking capacity for reliable fault protection.
- Current limiting Energy Class 3 construction.
- Compact DIN rail mounted design.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200MT railway miniature circuit breaker series.
- Model: S203MT-C20.
- Rated current: 20 A.
- Number of poles: 3.
- C characteristic tripping curve.
- 10 kA rated short-circuit breaking capacity.
- Thermal overload and magnetic short circuit protection.
- Current limiting Energy Class 3.
- DIN rail mounting.
- Compatible with auxiliary contacts, signalling contacts and shunt trip accessories.
Reliable Circuit Protection for Railway and Industrial Systems
The ABB S203MT-C20 combines delayed thermal overload protection with rapid magnetic short circuit protection to safeguard electrical equipment against overloads and fault currents. Its current limiting construction helps reduce thermal and mechanical stress during short circuit events, improving overall system reliability.
Developed specifically for railway applications, the S200MT range also performs exceptionally well in industrial automation, machine building and OEM installations where dependable protection and long operational life are required.
Typical Applications
- Railway rolling stock.
- Traction electrical systems.
- Auxiliary railway equipment.
- Industrial control panels.
- Automation and PLC systems.
- Machine building and OEM equipment.
- Three-phase electrical distribution.
