Why Choose the ABB S203MT-K1NA Miniature Circuit Breaker?
The ABB S203MT-K1NA is a compact and reliable 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200MT series. Designed for traction, railway and industrial applications, it provides dependable protection against overloads and short circuits in demanding electrical environments.
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 suitable for inductive loads and circuits where temporary inrush currents may occur during normal operation.
With a 1 A rated current, 3P+N configuration and 10 kA breaking capacity, the S203MT-K1NA provides sensitive low-current protection for three-phase circuits requiring neutral switching. Its compact DIN rail design makes it suitable for railway electrical systems, control panels, automation equipment and OEM installations.
Key Advantages
- Compact 3P+N miniature circuit breaker for railway and industrial installations.
- 1 A rated current for sensitive low-current circuit protection.
- K curve tripping characteristic suitable for inductive loads and 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: 2CDS273106R0217.
- Model: S203MT-K1NA.
- Rated current: 1 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 Railway and Industrial Control Circuits
Miniature circuit breakers protect electrical circuits by automatically disconnecting the supply when overloads or short circuits occur. The ABB S203MT-K1NA combines thermal and magnetic tripping performance to help protect cables, components and connected equipment from electrical faults.
The K curve characteristic provides reliable protection for circuits where temporary inrush currents are expected. This makes the S203MT-K1NA suitable for control transformers, inductive loads, auxiliary circuits and railway electrical systems requiring dependable low-current protection.
Typical Applications
- Railway rolling stock electrical systems.
- Industrial control panels.
- Low-current three-phase circuits with neutral switching.
- Control transformer protection.
- Automation and machine control systems.
- OEM panel building applications.
