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ABB S203-D4NA MCB – S200 – 3P+N – D – 4A
ABB S203-D4NA three-pole plus switched neutral miniature circuit breaker with 4 A rated current, D curve tripping characteristic and 6 kA breaking capacity for industrial and commercial electrical installations.
£144.80
Why Choose the ABB S203-D4NA Miniature Circuit Breaker?
The ABB S203-D4NA 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 4 A rated current, the S203-D4NA is particularly suited to protecting circuits supplying transformers, motors, solenoids and other inductive loads with high inrush currents. Its current limiting design helps minimise fault energy while protecting connected equipment and maintaining system reliability.
Manufactured to ABB's exacting quality standards, the S203-D4NA offers excellent mechanical durability, dependable switching performance and compatibility with ABB's extensive range of System pro M Compact accessories, making it an excellent solution for professional electrical installations.
Key Advantages
- Reliable 3P+N miniature circuit breaker for industrial and commercial applications.
- 4 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.
- 4 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-D4NA 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 ideal 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 suitable for modern electrical 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.
Technical Specifications
Tick the specs you need, then view products that match.
| Phase | Three Phase | |
|---|---|---|
| Current | 4 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-D4NA | |
| Product ID | 2CDS253103R0041 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 4 A | |
| Tripping characteristic | D Curve | |
| Number of poles | 3P+N | |
| Protected poles | 3 | |
| Rated operational voltage | 400 V AC | |
| Maximum operating voltage | 440 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short circuit breaking capacity | 6 kA | |
| 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, UL 1077 |
Frequently Asked Questions
What is the ABB S203-D4NA used for?
The ABB S203-D4NA protects three-phase electrical circuits with a switched neutral against overloads and short circuits in industrial and commercial applications.
What does the D curve characteristic mean?
A D curve miniature circuit breaker is designed for circuits with high inrush currents, making it suitable for motors, transformers and other inductive equipment.
What is the rated current of this circuit breaker?
The ABB S203-D4NA has a 4 A rated current.
What does 3P+N mean?
3P+N indicates three protected phase poles together with an additional switched neutral pole, allowing all conductors to be switched simultaneously.
How is the ABB S203-D4NA installed?
The breaker is designed for standard DIN rail mounting inside electrical distribution boards and industrial control panels.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted worldwide by electrical contractors, panel builders and industrial engineers for dependable circuit protection, long service life and reliable performance.
