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ABB S203-D63NA MCB – S200 – 3P+N – D – 63A
ABB S203-D63NA System pro M compact 3P+N miniature circuit breaker with 63 A rated current, D characteristic and 6 kA breaking capacity for industrial and commercial electrical installations.
£144.73
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.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 63 A | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | D curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200 | |
| Model | S203-D63NA | |
| Product ID | 2CDS253103R0631 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 63 A | |
| Tripping characteristic | D | |
| Number of poles | 3P+N | |
| Rated operational voltage | Up to 440 V AC | |
| Frequency | 50 / 60 Hz | |
| Rated short-circuit capacity | 6 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 | |
| Mechanical endurance | 20,000 operations | |
| Electrical endurance | 10,000 operations | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-D63NA used for?
The ABB S203-D63NA protects three-phase electrical circuits against overloads and short circuits while providing a switched neutral connection for enhanced system safety.
What does the D characteristic mean?
The D characteristic allows higher inrush currents before magnetic tripping, making it suitable for motors, transformers and other inductive loads.
What is the rated current of this circuit breaker?
The ABB S203-D63NA has a 63 A rated current.
Can auxiliary accessories be fitted?
Yes. The breaker is compatible with ABB auxiliary contacts, shunt trips, signalling contacts and undervoltage releases.
Where is this miniature circuit breaker typically installed?
It is designed for DIN rail mounting inside distribution boards, industrial control panels and commercial electrical installations.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers for providing dependable circuit protection, long service life and consistent performance in demanding applications.
