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ABB S203-D40NA MCB – S200 – 3P+N – D – 40A
ABB S203-D40NA System pro M Compact miniature circuit breaker with 3P+N configuration, 40 A rated current, D tripping characteristic and 6 kA breaking capacity for industrial circuit protection.
£156.35
Why Choose the ABB S203-D40NA Miniature Circuit Breaker?
The ABB S203-D40NA is a premium 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200 series, engineered to provide dependable overload and short circuit protection for demanding industrial, commercial and OEM electrical installations. Featuring a D tripping characteristic, this breaker is specifically designed for circuits with high inrush currents, making it ideal for motors, compressors, transformers and other inductive loads.
Built using ABB's advanced thermal and electromagnetic tripping technology, the S203-D40NA delivers reliable circuit protection with excellent current limiting performance. Its compact DIN rail mounted design enables quick installation in switchboards, distribution boards and industrial control panels while remaining fully compatible with ABB's extensive range of S200 accessories.
With a 40 A rated current, 3P+N configuration and a 6 kA breaking capacity, the ABB S203-D40NA provides dependable protection for three-phase electrical systems requiring a switched neutral, ensuring safe and reliable operation in demanding industrial environments.
Key Advantages
- 3P+N miniature circuit breaker for three-phase systems with switched neutral.
- 40 A rated current for industrial power distribution.
- D characteristic trip curve for high inrush current applications.
- 6 kA breaking capacity for dependable short circuit protection.
- Compact DIN rail mounting for straightforward installation.
- Compatible with ABB S200 series accessories for enhanced system flexibility.
Key Features
- ABB System pro M Compact S200 series.
- Model: S203-D40NA.
- Rated current: 40 A.
- 3P+N pole configuration.
- D tripping characteristic.
- 6 kA rated short circuit capacity.
- Thermal overload and electromagnetic short circuit protection.
- Current limiting design.
- DIN rail mounting.
Reliable Protection for Industrial Power Systems
The ABB S203-D40NA automatically disconnects electrical circuits during overload and short circuit conditions, helping protect wiring, machinery and connected equipment from damage while maintaining electrical safety and operational reliability.
Its D characteristic provides a higher magnetic trip threshold than standard B and C curve devices, making it particularly suitable for motors, transformers, compressors, pumps and other inductive equipment with high starting currents.
Typical Applications
- Industrial motor circuits.
- Machine building and OEM equipment.
- Industrial control panels.
- Compressors and pumps.
- Transformer protection.
- Commercial and industrial power distribution.
Technical Specifications
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| Phase | Three Phase | |
|---|---|---|
| Current | 40 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-D40NA | |
| Product ID | 2CDS253103R0401 | |
| Product type | Miniature Circuit Breaker (MCB) | |
| Rated current | 40 A | |
| Tripping characteristic | D | |
| Number of poles | 3P+N | |
| Rated operational voltage | 400 V AC | |
| Maximum operational voltage | 440 V AC | |
| Rated frequency | 50 / 60 Hz | |
| Rated short circuit capacity | 6 kA | |
| Energy limiting class | 3 | |
| Mounting type | DIN rail | |
| Dimensions (H × W × D) | 88 × 70 × 69 mm | |
| Weight | Approx. 0.52 kg | |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
Frequently Asked Questions
What is the ABB S203-D40NA used for?
The ABB S203-D40NA protects three-phase electrical circuits with a neutral against overloads and short circuits in industrial and commercial installations.
What does the D trip characteristic mean?
The D characteristic is designed for circuits with high inrush currents, making it suitable for motors, transformers, compressors and other inductive loads.
What is the rated current of this breaker?
This miniature circuit breaker has a 40 A rated current.
How is the S203-D40NA installed?
The breaker mounts directly onto a standard 35 mm DIN rail inside switchboards, distribution boards and industrial control panels.
Can ABB accessories be fitted?
Yes. The ABB S200 range supports auxiliary contacts, shunt trips, undervoltage releases, motor operators and other compatible accessories.
Trusted by Electrical Professionals Worldwide
ABB System pro M Compact miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers worldwide for dependable circuit protection, excellent build quality and long service life.
