Why Choose the ABB S203M-K25NA Miniature Circuit Breaker?
The ABB S203M-K25NA is a high-quality 3P+N miniature circuit breaker (MCB) from the ABB System pro M compact S200M series. Designed for reliable protection against overloads and short circuits, it is suitable for residential, commercial and industrial electrical installations where dependable circuit protection is required.
This miniature circuit breaker 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 makes it especially suitable for circuits with higher inrush currents, helping reduce nuisance tripping while maintaining strong protection performance.
With a 25 A rated current, 3P+N configuration and 10 kA breaking capacity, the S203M-K25NA is ideal for three-phase electrical distribution, control panels, machinery and inductive loads requiring neutral switching. Its compact DIN rail design makes it easy to install in modern electrical panels and distribution boards.
Key Advantages
- Compact 3P+N miniature circuit breaker for professional circuit protection.
- 25 A rated current for industrial and commercial electrical circuits.
- K curve tripping characteristic suitable for inductive loads and higher inrush currents.
- 10 kA rated short-circuit breaking capacity under EN 60898 conditions.
- Current-limiting design helps reduce fault energy.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200M series.
- Product ID: 2CDS273103R0517.
- Model: S203M-K25NA.
- Rated current: 25 A.
- K curve tripping characteristic.
- 3P+N configuration with three protected poles and neutral switching.
- Thermal overload and electromechanical short-circuit protection.
- DIN rail mounting with screw terminal connections.
Reliable Protection for Industrial Electrical Systems
Miniature circuit breakers protect electrical circuits by disconnecting the supply automatically when overloads or short circuits occur. The ABB S203M-K25NA combines thermal and magnetic tripping performance to protect cables, equipment and connected loads from electrical faults.
The K curve characteristic is designed for applications where temporary inrush currents can occur during normal operation. This makes the S203M-K25NA well suited to motor circuits, transformer supplies, industrial control panels and other inductive load applications.
Typical Applications
- Industrial control panels.
- Three-phase circuits with neutral switching.
- Motor control and automation systems.
- Transformer and inductive load protection.
- Commercial electrical distribution boards.
- OEM machinery and panel building applications.
