Why Choose the ABB S203MT-K0.5 Miniature Circuit Breaker?
The ABB S203MT-K0.5 is a robust and compact 3-pole miniature circuit breaker (MCB) designed for reliable overcurrent and short-circuit protection in demanding industrial, traction and railway applications. As part of the ABB S200MT miniature circuit breaker range, it provides dependable circuit protection where durability, safety and compliance are essential.
This MCB uses both a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. The K characteristic makes it suitable for circuits with higher inrush currents, helping reduce unwanted tripping while maintaining effective protection for connected equipment.
With a rated current of 0.5 A, a 3-pole configuration and a rated breaking capacity of 10 kA, the S203MT-K0.5 is ideal for low-current three-phase control, signalling and auxiliary circuits. Its modular DIN rail design enables straightforward installation in electrical panels, control cabinets and transport-related systems.
Key Advantages
- Compact 3-pole miniature circuit breaker for traction and railway applications.
- 0.5 A rated current for low-current circuit protection.
- K curve tripping characteristic suitable for circuits with higher inrush currents.
- 10 kA breaking capacity for dependable short-circuit protection.
- Current limiting design helps protect downstream equipment.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB S200MT miniature circuit breaker series.
- 3-pole MCB configuration.
- 0.5 A rated current.
- K characteristic tripping curve.
- 10 kA rated short-circuit breaking capacity.
- Thermal and electromagnetic trip mechanisms.
- Designed for 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-K0.5 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.
The ABB S200MT range is designed for demanding environments including rolling stock and transport-related electrical systems. Its compact modular construction, high breaking capacity and accessory compatibility make it a practical choice for engineers designing reliable circuit protection panels.
Typical Applications
- Railway and traction electrical systems.
- Rolling stock control panels.
- Three-phase auxiliary circuits.
- Industrial control cabinets.
- Low-current motor control circuits.
- Automation, signalling and protection systems.
