Why Choose the ABB S203M-D3NA Miniature Circuit Breaker?
The ABB S203M-D3NA is a premium 3+NP miniature circuit breaker (MCB) engineered to provide reliable overload and short circuit protection for residential, commercial and industrial electrical installations. As part of the trusted ABB System pro M compact S200M series, it delivers dependable low voltage circuit protection with a compact DIN rail mounted design.
The circuit breaker combines a delayed thermal tripping mechanism for overload protection with an electromechanical tripping mechanism for short circuit protection. Its D characteristic tripping curve is specifically designed for circuits with high inrush currents, making it ideal for motors, transformers, solenoids and other inductive electrical loads.
With a 3 A rated current, 3+NP configuration and 10 kA rated short circuit capacity, the ABB S203M-D3NA provides dependable protection for three-phase and neutral circuits. The switched neutral pole enables safe isolation whilst maintaining compact installation inside distribution boards and control panels.
Key Advantages
- Compact 3+NP miniature circuit breaker for professional installations.
- 3 A rated current for low current protection applications.
- D characteristic tripping curve for high inrush current loads.
- 10 kA rated short circuit capacity for dependable fault protection.
- Compatible with ABB System pro M compact accessories.
- DIN rail mounting for quick installation and maintenance.
Key Features
- ABB System pro M compact S200M series.
- 3 A rated current.
- 3+NP pole configuration.
- D characteristic tripping curve.
- 10 kA rated short circuit capacity.
- Thermal overload and electromechanical short circuit protection.
- Current limiting construction.
- Suitable for residential, commercial and industrial applications.
Reliable Circuit Protection for Low Voltage Installations
ABB System pro M compact S200M miniature circuit breakers are current limiting protective devices designed to safeguard electrical circuits against overload and short circuit conditions. They comply with both IEC/EN 60898-1 and IEC/EN 60947-2, making them suitable for residential, commercial and industrial applications.
The D curve characteristic of the S203M-D3NA provides a higher magnetic trip threshold than B or C curve devices, allowing temporary starting currents to pass without nuisance tripping whilst maintaining rapid protection during genuine fault conditions.
Typical Applications
- Industrial control panels.
- Three-phase distribution boards.
- Motor starter circuits.
- Transformer protection.
- Automation and machinery.
- Commercial and industrial electrical installations.
