Why Choose the ABB S203MT-K25NA Miniature Circuit Breaker?
The ABB S203MT-K25NA is a robust 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200MT series. Designed for traction, railway and demanding industrial applications, it provides reliable protection against overloads and short circuits in electrical systems where dependable performance and compact installation are required.
The S200MT range uses ABB's current-limiting technology with a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. Its K curve characteristic is designed for circuits with higher inrush currents, making it suitable for motors, transformers, contactors and other inductive loads.
With a 25 A rated current, 3P+N configuration and 10 kA breaking capacity, the S203MT-K25NA provides professional-grade protection for three-phase circuits requiring neutral switching. Its DIN rail format makes it suitable for railway electrical enclosures, industrial control panels, automation systems and commercial distribution boards.
Key Advantages
- Compact 3P+N miniature circuit breaker for railway and industrial installations.
- 25 A rated current for professional circuit protection.
- K curve tripping characteristic suitable for inductive loads and higher inrush currents.
- 10 kA rated short-circuit breaking capacity for dependable fault protection.
- Current-limiting design helps reduce fault energy.
- DIN rail mounting for fast installation in panels and distribution boards.
Key Features
- ABB System pro M compact S200MT series.
- Product ID: 2CDS273106R0517.
- Model: S203MT-K25NA.
- Rated current: 25 A.
- K curve tripping characteristic.
- 3P+N configuration with three protected poles and switched neutral.
- Thermal overload and electromechanical short-circuit protection.
- Compact DIN rail design with screw terminal connections.
Reliable Protection for High-Inrush Electrical Circuits
Miniature circuit breakers protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. The ABB S203MT-K25NA combines thermal and magnetic tripping performance to help protect cables, components and connected equipment from electrical faults.
The K curve characteristic is suitable for applications where temporary inrush currents occur during normal operation. This makes the S203MT-K25NA a strong choice for motor circuits, transformer supplies, railway auxiliary systems and industrial control equipment.
Typical Applications
- Railway rolling stock electrical systems.
- Industrial control panels.
- Motor and transformer protection.
- Three-phase circuits with neutral switching.
- Automation and machine control systems.
- OEM panel building applications.
