Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.
ABB S203-D0.5NA MCB – S200 – 3P+N – D – 0.5A
ABB S203-D0.5NA System pro M compact 3P+N miniature circuit breaker with 0.5 A rated current, D characteristic and 6 kA breaking capacity for industrial control and automation applications.
£144.83
Why Choose the ABB S203-D0.5NA Miniature Circuit Breaker?
The ABB S203-D0.5NA is a premium 3P+N miniature circuit breaker (MCB) from the renowned ABB System pro M compact S200 series. It is engineered to provide dependable overload and short circuit protection for three-phase electrical systems while incorporating a switched neutral pole for enhanced safety and isolation.
Featuring a D characteristic tripping curve, the S203-D0.5NA is specifically designed for circuits with high inrush currents, making it ideal for protecting control transformers, inductive loads, specialist automation equipment and other applications where nuisance tripping must be avoided. ABB's current limiting technology reduces fault energy and helps protect connected equipment from electrical damage.
With a 0.5 A rated current, 3 protected poles plus switched neutral, 6 kA breaking capacity and compact DIN rail mounting, the ABB S203-D0.5NA provides reliable protection for low-current industrial control systems and commercial electrical installations.
Key Advantages
- 3P+N miniature circuit breaker for three-phase installations with switched neutral.
- 0.5 A rated current for precise low-current protection.
- D characteristic designed for high inrush current applications.
- 6 kA breaking capacity for dependable fault protection.
- Current limiting technology helps minimise fault energy.
- Compact DIN rail mounting for quick installation.
- Compatible with ABB System pro M compact accessories.
Key Features
- ABB System pro M compact S200 series.
- Model: S203-D0.5NA.
- Rated current: 0.5 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.
- Current limiting Energy Class 3.
- DIN rail mounting.
- Compatible with auxiliary contacts, shunt trips and undervoltage releases.
Reliable Circuit Protection for Specialist Low-Current Applications
The ABB S203-D0.5NA combines delayed thermal overload protection with rapid electromechanical short circuit protection to safeguard sensitive electrical circuits and connected equipment. Its current limiting design helps reduce thermal and mechanical stresses during fault conditions, improving system reliability.
Its D characteristic tripping curve is particularly suitable for applications involving transformers, magnetic coils, solenoids and other inductive equipment with high starting currents, while maintaining reliable overload protection during normal operation.
Typical Applications
- Industrial control panels.
- Automation and PLC systems.
- Control transformer protection.
- Machine building and OEM equipment.
- Inductive low-current circuits.
- Instrumentation systems.
- Commercial electrical distribution.
Technical Specifications
Tick the specs you need, then view products that match.
| Phase | Three Phase | |
|---|---|---|
| Current | 0.5 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-D0.5NA | |
| Product ID | 2CDS253103R0981 | |
| EAN | 4016779532761 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 0.5 A | |
| Tripping characteristic | D | |
| Number of poles | 3P+N | |
| Number of protected poles | 3 | |
| Rated operational voltage | 400 V AC | |
| Rated insulation voltage | 440 V | |
| Frequency | 50 / 60 Hz | |
| Rated breaking capacity | 6 kA | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 88 × 70 × 69 mm | |
| Weight | approx. 0.50 kg | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 |
Frequently Asked Questions
What is the ABB S203-D0.5NA used for?
The ABB S203-D0.5NA protects three-phase low-current electrical circuits against overloads and short circuits while providing a switched neutral pole.
What does the D characteristic mean?
The D characteristic is intended for circuits with high inrush currents, including transformers, inductive loads and specialist industrial equipment.
What is the rated current of this circuit breaker?
The ABB S203-D0.5NA has a rated current of 0.5 A.
What is the breaking capacity of the ABB S203-D0.5NA?
The breaker 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 industrial control panels, electrical cabinets and commercial distribution boards.
Trusted by Electrical Professionals Worldwide
ABB System pro M compact miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers for delivering dependable circuit protection, excellent build quality and long-term reliability in demanding electrical installations.
