Why Choose the ABB S203-D63NA Miniature Circuit Breaker?
The ABB S203-D63NA is a high-quality 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200 series. It is engineered to provide dependable overload and short circuit protection for three-phase electrical installations while incorporating a switched neutral pole. Featuring a D characteristic tripping curve, this circuit breaker is particularly suited to circuits with high inrush currents, making it ideal for industrial motors, transformers and inductive loads.
Designed using ABB's proven thermal and electromechanical tripping technology, the S203-D63NA delivers reliable circuit protection, excellent current limiting performance and long operational life. Its compact DIN rail mounted construction allows quick installation within distribution boards and control panels, while compatibility with ABB accessories provides additional flexibility for modern electrical systems.
With a 63 A rated current, 3 protected poles plus switched neutral, and a 6 kA breaking capacity, the ABB S203-D63NA offers dependable protection for commercial, industrial and OEM electrical installations requiring reliable operation under demanding conditions.
Key Advantages
- 3P+N miniature circuit breaker for three-phase electrical systems.
- 63 A rated current suitable for industrial power distribution.
- D characteristic designed for high inrush current applications.
- 6 kA breaking capacity provides reliable fault protection.
- Current limiting design helps minimise damage during fault conditions.
- Compatible with ABB System pro M compact accessories.
- Suitable for commercial, industrial and OEM installations.
Key Features
- ABB System pro M compact S200 series.
- Model: S203-D63NA.
- Rated current: 63 A.
- Number of poles: 3 protected poles + neutral.
- D characteristic tripping curve.
- 6 kA rated short-circuit breaking capacity.
- Thermal overload and electromechanical short circuit protection.
- DIN rail mounting.
- Red ON and green OFF contact position indication.
- Compatible with auxiliary contacts, shunt trips and undervoltage releases.
Reliable Circuit Protection for High Inrush Current Applications
The ABB S203-D63NA combines delayed thermal overload protection with rapid electromechanical short circuit protection to safeguard electrical systems against overloads and fault currents while maintaining excellent reliability in demanding installations.
Its D characteristic tripping curve is specifically intended for applications with high starting currents, such as motors, transformers and other inductive equipment, helping to prevent nuisance tripping during normal operation while maintaining effective fault protection.
Typical Applications
- Industrial motor circuits.
- Transformer protection.
- Machine building and OEM equipment.
- Industrial control panels.
- Commercial electrical distribution systems.
- Manufacturing machinery.
- Three-phase power distribution.
