Why Choose the ABB S203MT-C3 Miniature Circuit Breaker?
The ABB S203MT-C3 is a high-performance 3-pole miniature circuit breaker (MCB) from the specialist ABB S200MT series. It is designed to provide dependable overload and short circuit protection for railway, traction, rolling stock and demanding industrial applications where reliability, compact installation and consistent protection are essential.
Featuring a C characteristic tripping curve, the S203MT-C3 is suitable for circuits with moderate inrush currents, including control equipment, auxiliary railway circuits, automation panels and industrial electrical systems. ABB's current limiting design helps reduce fault energy, while thermal and electromechanical tripping mechanisms provide reliable protection during normal operation.
With a 3 A rated current, 3 protected poles, 10 kA breaking capacity and DIN rail mounted construction, the ABB S203MT-C3 is ideal for low-current three-phase protection in transport infrastructure, rolling stock cabinets, control panels and OEM machinery.
Key Advantages
- Specialist railway and traction miniature circuit breaker for demanding environments.
- 3 A rated current for precise low-current circuit protection.
- C characteristic suitable for circuits with moderate inrush currents.
- 10 kA breaking capacity for high fault protection performance.
- Current limiting Energy Class 3 design helps reduce fault energy.
- DIN rail mounted for simple installation in panels and cabinets.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200MT railway miniature circuit breaker series.
- Model: S203MT-C3.
- Rated current: 3 A.
- Number of poles: 3.
- C characteristic tripping curve.
- 10 kA rated short-circuit breaking capacity.
- Thermal overload and electromechanical short circuit protection.
- Current limiting Energy Class 3.
- Compact DIN rail mounting.
- Compatible with auxiliary contacts, shunt trips and undervoltage releases.
Reliable Circuit Protection for Railway and Industrial Systems
The ABB S203MT-C3 combines delayed thermal overload protection with rapid magnetic short circuit protection to help safeguard cables, equipment and connected electrical systems from damaging fault conditions. Its current limiting design helps reduce thermal and mechanical stress during short circuit events, supporting long-term system reliability.
The C characteristic tripping curve makes this MCB suitable for railway auxiliary circuits, control equipment, automation systems and general-purpose industrial loads where moderate inrush currents can occur during normal operation.
Typical Applications
- Railway rolling stock.
- Traction electrical systems.
- Auxiliary railway circuits.
- Industrial control panels.
- Automation and PLC systems.
- Machine building and OEM equipment.
- Low-current three-phase protection.
