Why Choose the ABB S203M-K2NA Miniature Circuit Breaker?
The ABB S203M-K2NA is a robust 4-pole miniature circuit breaker (MCB) from the proven ABB System pro M compact S200M series. Designed to provide dependable protection against overloads and short circuits, it is suitable for industrial, commercial and OEM electrical installations where high performance and reliability are essential.
Featuring ABB's advanced current-limiting technology, the S203M-K2NA incorporates both a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. Its K curve characteristic makes it particularly suitable for circuits with higher inrush currents such as motors, transformers and inductive loads.
With a 2 A rated current, 4-pole configuration and 10 kA breaking capacity, this miniature circuit breaker provides reliable protection for three-phase electrical systems requiring neutral switching. Its compact DIN rail design allows straightforward installation into modern control panels and distribution boards.
Key Advantages
- Compact 4-pole miniature circuit breaker for professional electrical protection.
- 2 A rated current for low-current industrial circuits.
- K curve tripping characteristic ideal for inductive loads.
- 10 kA breaking capacity for reliable fault protection.
- Current-limiting design helps minimise fault energy.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200M series.
- Product ID: 2CDS273103R0277.
- Model: S203M-K2NA.
- Rated current: 2 A.
- K curve tripping characteristic.
- 4-pole configuration with three protected poles and switched neutral.
- 10 kA rated short-circuit breaking capacity.
- DIN rail mounting with screw terminals.
Reliable Protection for Industrial Electrical Systems
Miniature circuit breakers automatically disconnect electrical circuits when overloads or short circuits occur, protecting wiring and connected equipment from damage. The ABB S203M-K2NA combines thermal and magnetic trip mechanisms to deliver fast, dependable protection in demanding applications.
Its K curve characteristic makes it especially suitable for installations where motors, transformers and other inductive loads generate temporary inrush currents during start-up, reducing nuisance tripping while maintaining excellent fault protection.
Typical Applications
- Industrial control panels.
- Motor control circuits.
- Transformer protection.
- OEM machinery.
- Commercial distribution boards.
- Industrial automation systems.
