Why Choose the ABB S203M-K1NA Miniature Circuit Breaker?
The ABB S203M-K1NA is a professional miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in commercial, industrial and high-performance electrical installations. As part of the trusted ABB System pro M compact S200M series, it offers dependable current limiting protection for distribution boards, switchboards and control panels.
This miniature circuit breaker features a K curve tripping characteristic, making it suitable for circuits with higher inrush currents than standard B or C curve applications. It is commonly used for inductive loads, control circuits, transformers and equipment where nuisance tripping must be reduced while maintaining safe fault protection.
With a rated current of 1 A, a 3+NP pole configuration and a breaking capacity of up to 10 kA, the S203M-K1NA is ideal for specialised three-phase circuit protection applications requiring a switched neutral. Its compact DIN rail format supports quick installation in modular electrical enclosures.
Key Advantages
- Reliable ABB miniature circuit breaker for professional circuit protection.
- 1 A rated current for low-current three-phase circuits.
- K curve tripping characteristic for inductive loads and higher inrush current applications.
- 3+NP configuration for three-phase systems requiring neutral switching.
- Current-limiting design helps protect cables and connected equipment.
- DIN rail mounting for fast installation in control panels and distribution boards.
Key Features
- ABB System pro M compact S200M series.
- 1 A rated current.
- K curve tripping characteristic.
- 3+NP pole configuration.
- Up to 10 kA breaking capacity at 230 / 400 V AC.
- Thermal tripping mechanism for overload protection.
- Electromechanical tripping mechanism for short-circuit protection.
- Compact modular design for DIN rail mounting.
Reliable Protection for Low-Current Three-Phase Circuits
Miniature circuit breakers such as the ABB S203M-K1NA automatically disconnect electrical circuits during overload or short-circuit conditions. This helps protect cables, equipment and connected loads while supporting safe and compliant electrical installation design.
The ABB S200M range is engineered for professional installations requiring compact dimensions, dependable performance and high breaking capacity. Its modular format makes it suitable for electrical distribution boards, industrial control panels and OEM equipment where reliable protection is essential.
Typical Applications
- Industrial control panels.
- Low-current three-phase distribution circuits.
- Transformer and inductive load protection.
- Machine building and OEM electrical systems.
- Commercial distribution boards.
- Automation and control equipment protection.
