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ABB S203-B63NA MCB – S200 – 3P+N – B – 63A
ABB S203-B63NA System pro M compact 3P+N miniature circuit breaker with 63 A rated current, B characteristic and 6 kA breaking capacity for residential, commercial and industrial electrical installations.
£157.92
Why Choose the ABB S203-B63NA Miniature Circuit Breaker?
The ABB S203-B63NA is a reliable 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200 series. It is designed to protect electrical circuits against overloads and short circuits while providing three protected poles plus a switched neutral for three-phase installations.
Featuring a B characteristic tripping curve, the S203-B63NA is suitable for circuits with low inrush currents, including lighting, resistive loads and general electrical distribution. ABB's current limiting design helps reduce fault energy, while the combination of delayed thermal and electromechanical tripping provides dependable protection across a wide range of applications.
With a 63 A rated current, 3P+N configuration and 6 kA breaking capacity, the ABB S203-B63NA is ideal for residential, commercial and industrial installations where compact DIN rail mounted circuit protection is required.
Key Advantages
- 3P+N miniature circuit breaker for three-phase circuits with switched neutral.
- 63 A rated current for higher load electrical distribution.
- B characteristic suitable for low inrush current applications.
- 6 kA breaking capacity for dependable short circuit protection.
- Current limiting operation helps minimise fault energy.
- DIN rail mounted design for fast installation in panels and distribution boards.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200 series.
- Model: S203-B63NA.
- Rated current: 63 A.
- Number of poles: 3 protected poles + neutral.
- B characteristic tripping curve.
- 6 kA rated short-circuit breaking capacity.
- Thermal overload and electromechanical short circuit protection.
- Compact DIN rail mounting.
- Suitable for residential, commercial and industrial installations.
- Compatible with auxiliary contacts, shunt trips and undervoltage releases.
Reliable Circuit Protection for Low Inrush Loads
The ABB S203-B63NA combines delayed thermal overload protection with electromechanical short circuit protection to help safeguard cables, equipment and electrical installations from damaging fault conditions. Its current limiting performance helps reduce stress on downstream components during short circuit events.
The B characteristic tripping curve is designed for circuits where low inrush currents are expected, making this MCB suitable for general distribution, lighting circuits, resistive loads and building services installations.
Typical Applications
- Residential electrical distribution boards.
- Commercial lighting circuits.
- Resistive electrical loads.
- Building services installations.
- Industrial control panels.
- Three-phase power distribution.
- General low inrush electrical circuits.
Technical Specifications
Tick the specs you need, then view products that match.
| Phase | Three Phase | |
|---|---|---|
| Current | 63 A | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | B curve | |
| Breaking Capacity | 6 kA | |
| Manufacturer | ABB | |
| Series | System pro M compact S200 | |
| Model | S203-B63NA | |
| Product ID | 2CDS253103R0635 | |
| EAN | 4016779536172 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 63 A | |
| Tripping characteristic | B | |
| Number of poles | 3P+N | |
| Number of protected poles | 3 | |
| Rated operational voltage | 400 V AC | |
| Frequency | 50 / 60 Hz | |
| Rated breaking capacity | 6 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm | |
| Weight | approx. 0.47 kg | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203-B63NA used for?
The ABB S203-B63NA is used to protect three-phase electrical circuits against overloads and short circuits while providing a switched neutral pole.
What does the B characteristic mean?
The B characteristic is designed for circuits with low inrush currents, such as lighting circuits, resistive loads and general electrical distribution.
What is the rated current of this circuit breaker?
The ABB S203-B63NA has a rated current of 63 A.
What is the breaking capacity of the ABB S203-B63NA?
The ABB S203-B63NA has a rated short circuit breaking capacity of 6 kA.
Where is this miniature circuit breaker typically installed?
It is designed for DIN rail mounting inside distribution boards, consumer units, control panels and electrical cabinets.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers for dependable circuit protection, compact installation and long-term performance across residential, commercial and industrial systems.
