Why Choose the ABB S203-K1NA Miniature Circuit Breaker?
The ABB S203-K1NA is a high-quality 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series, designed to provide dependable overload and short circuit protection for commercial and industrial electrical installations. Featuring a K tripping characteristic, this breaker is particularly suited to circuits with higher inrush currents, making it an excellent choice for motor loads, transformers and other inductive applications.
Designed to meet the requirements of modern electrical installations, the S203-K1NA combines excellent protection performance with a compact DIN rail mounted design. ABB's proven thermal and magnetic trip mechanisms help ensure reliable circuit protection while minimising downtime and protecting connected equipment.
With a 1 A rated current, 3P+N configuration and a 6 kA breaking capacity, the ABB S203-K1NA offers reliable protection for three-phase distribution systems where a switched neutral is required. Manufactured to comply with international standards, it is suitable for demanding industrial, commercial and OEM applications.
Key Advantages
- 3P+N miniature circuit breaker for three-phase systems with neutral protection.
- K characteristic trip curve ideal for circuits with higher starting currents.
- 1 A rated current for specialised low-current protection.
- 6 kA breaking capacity for dependable fault protection.
- Compact DIN rail mounting for simple installation.
- Compatible with ABB S200 series accessories for expanded functionality.
Key Features
- ABB System pro M Compact S200 series.
- Model: S203-K1NA.
- Rated current: 1 A.
- 3P+N pole configuration.
- K tripping characteristic.
- 6 kA rated short circuit capacity.
- Thermal and magnetic trip mechanisms.
- DIN rail mounting.
- Suitable for industrial, commercial and OEM installations.
Reliable Protection for Industrial Electrical Systems
The ABB S203-K1NA protects electrical circuits by automatically disconnecting the supply during overload or short circuit conditions. Its combined thermal and magnetic tripping mechanisms provide fast, dependable protection while helping prevent damage to cables, equipment and connected machinery.
The K characteristic offers a higher magnetic trip threshold than standard B or C curve breakers, making it especially suitable for loads with elevated starting currents such as motors, transformers and industrial control equipment.
Typical Applications
- Industrial motor circuits.
- Control panels and switchboards.
- Machine building and OEM equipment.
- Three-phase distribution systems.
- Transformers and inductive loads.
- Commercial and industrial electrical installations.
