Why Choose the ABB S203-K3NA Miniature Circuit Breaker?
The ABB S203-K3NA is a premium 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 industrial, commercial and OEM electrical installations. Featuring a K tripping characteristic, this breaker is specifically engineered for circuits with elevated inrush currents, making it ideal for protecting motors, transformers, solenoids and other inductive equipment.
Manufactured using ABB's advanced thermal and electromagnetic trip technology, the S203-K3NA delivers reliable circuit protection with excellent current limiting performance. Its compact DIN rail mounted design allows quick installation within switchboards, distribution boards and industrial control panels while remaining fully compatible with ABB's range of S200 accessories.
With a 3 A rated current, 3P+N configuration and a 6 kA breaking capacity, the ABB S203-K3NA provides dependable protection for three-phase electrical systems requiring a switched neutral, ensuring reliable operation in demanding industrial environments.
Key Advantages
- 3P+N miniature circuit breaker for three-phase systems with switched neutral.
- 3 A rated current for specialised industrial protection.
- K characteristic trip curve for higher inrush current applications.
- 6 kA breaking capacity for dependable fault interruption.
- 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-K3NA.
- Rated current: 3 A.
- 3P+N pole configuration.
- K tripping characteristic.
- 6 kA rated short circuit capacity.
- Thermal overload and electromagnetic short circuit protection.
- Current limiting design.
- DIN rail mounting.
Reliable Protection for Industrial Power Systems
The ABB S203-K3NA automatically disconnects electrical circuits during overload and short circuit conditions, helping protect wiring, machinery and connected equipment from damage while maintaining electrical safety and system reliability.
Its K characteristic magnetic trip curve is designed for circuits with elevated starting currents, making it particularly suitable for motors, transformers, magnetic coils and other inductive equipment where higher magnetic trip thresholds are required.
Typical Applications
- Industrial motor circuits.
- Machine building and OEM equipment.
- Industrial control panels.
- Transformer protection.
- Automation systems.
- Commercial and industrial power distribution.
