Why Choose the ABB S203MT-K40H01 Miniature Circuit Breaker?
The ABB S203MT-K40H01 is a high-performance miniature circuit breaker (MCB) designed for dependable overload and short-circuit protection in traction, railway and demanding industrial electrical installations. Part of the ABB System pro M compact S200MT series, it is built for applications where robust protection, compact installation and long-term reliability are essential.
With a 40 A rated current and K tripping characteristic, the S203MT-K40H01 is suitable for circuits with higher inrush currents, including motors, transformers, inductive loads and industrial control equipment. Its 3-pole configuration provides coordinated protection across three-phase circuits.
The ABB S203MT-K40H01 combines a compact modular housing, secure screw terminals and DIN rail mounting for efficient installation inside railway cabinets, industrial control panels and distribution boards. Its specialist traction design makes it a dependable choice for professional electrical protection in demanding environments.
Key Advantages
- Reliable miniature circuit breaker for traction and industrial applications.
- 40 A rated current for three-phase circuit protection.
- K characteristic suitable for inductive loads and higher inrush currents.
- 3-pole configuration for coordinated three-phase protection.
- Designed for railway, rolling stock and demanding industrial installations.
- Compact DIN rail mounted design for professional panel assemblies.
Key Features
- ABB S200MT miniature circuit breaker series.
- 40 A rated current.
- K tripping characteristic.
- 3-pole configuration.
- 10 kA rated short-circuit breaking capacity.
- Thermal magnetic trip mechanism for overload and short-circuit protection.
- Suitable for traction and railway applications.
- Compact modular housing with secure screw terminals.
Reliable Protection for Three-Phase Inductive Loads
Miniature circuit breakers such as the ABB S203MT-K40H01 automatically disconnect electrical circuits when overload or short-circuit conditions occur. This helps protect cables, connected equipment and electrical installations from damage while supporting safer operation.
The K characteristic is designed to tolerate higher starting currents than standard curves, reducing nuisance tripping in circuits with inductive loads. This makes the S203MT-K40H01 suitable for motor circuits, transformers, control gear and specialist traction installations.
Typical Applications
- Railway and traction electrical systems.
- Three-phase motor and transformer circuits.
- Industrial control panels.
- Machine building and automation equipment.
- Inductive load protection.
- Commercial and industrial distribution boards.
