Why Choose the ABB S203-D2NA Miniature Circuit Breaker?
The ABB S203-D2NA is a premium three-pole plus switched neutral (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, it is ideal for commercial, industrial and OEM electrical installations requiring reliable protection of three-phase circuits with a switched neutral.
Featuring a D curve tripping characteristic and a 2 A rated current, the S203-D2NA is particularly suited to protecting circuits supplying transformers, motors, control equipment and other inductive loads with high inrush currents. Its current limiting design helps minimise fault energy while protecting connected equipment and improving system reliability.
Manufactured to ABB's exacting quality standards, the S203-D2NA delivers excellent mechanical durability, dependable switching performance and compatibility with ABB's comprehensive range of modular accessories, making it an excellent solution for professional panel builders and electrical contractors.
Key Advantages
- Reliable 3P+N miniature circuit breaker for industrial and commercial applications.
- 2 A rated current with D curve tripping characteristic.
- 6 kA breaking capacity for dependable circuit protection.
- Protects against overloads and short circuits.
- Switched neutral provides additional installation flexibility.
- Compatible with ABB auxiliary contacts and signalling accessories.
Key Features
- ABB System pro M Compact S200 series.
- 2 A rated current.
- D characteristic trip curve.
- Three protected poles plus switched neutral (3P+N).
- 6 kA rated short circuit breaking capacity.
- DIN rail mounting.
- Thermal overload and magnetic short circuit protection.
- Failsafe bi-directional cylinder-lift terminals.
Reliable Protection for Three-Phase Electrical Systems
The ABB S203-D2NA combines thermal overload protection with rapid magnetic short circuit protection to safeguard electrical installations. Its D curve characteristic allows temporary high inrush currents without nuisance tripping, making it particularly suitable for motors, transformers and other inductive loads.
The integrated switched neutral enables simultaneous switching of the neutral conductor alongside the three live phases, making this breaker ideal for modern three-phase distribution systems, industrial control panels and OEM equipment.
Typical Applications
- Industrial control panels.
- Motor control circuits.
- Transformer protection.
- OEM machinery.
- Commercial electrical installations.
- Three-phase distribution systems with switched neutral.
