ABB S203M-C4NA 3P+N miniature circuit breaker with 4 A rated current, C curve tripping characteristic and 10 kA breaking capacity for professional electrical protection.
£204.42
The ABB S203M-C4NA is a high-performance 3P+N miniature circuit breaker (MCB) from the trusted ABB System pro M compact S200M series. Designed to provide dependable protection against overloads and short circuits, it is suitable for residential, commercial and industrial electrical installations where reliable circuit protection is essential.
Featuring ABB's proven current-limiting technology, the S203M-C4NA incorporates both a delayed thermal tripping mechanism for overload protection and an electromechanical tripping mechanism for short-circuit protection. Its robust construction, compact DIN rail design and compliance with international standards make it an excellent choice for professional electrical installations.
With a 4 A rated current, C curve tripping characteristic and 3P+N configuration, this miniature circuit breaker is ideal for protecting three-phase distribution circuits, control panels, machinery and industrial power systems requiring dependable circuit isolation and fault protection.
Miniature circuit breakers protect electrical installations by automatically disconnecting power when overloads or short circuits occur. The ABB S203M-C4NA combines thermal and magnetic trip mechanisms to provide rapid fault clearing while helping to minimise damage to connected equipment and wiring.
As part of the ABB System pro M compact range, this circuit breaker delivers dependable protection, long service life and compatibility with a wide range of ABB accessories, making it suitable for modern electrical distribution systems and industrial control panels.
| Current | 4 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-C4NA |
| Product ID | 2CDS273103R0044 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 4 A |
| Tripping characteristic | C |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated operational voltage | 400 V AC |
| Maximum operational voltage | 440 V AC |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 10 kA |
| Protection rating | IP20 (IP40 when installed in enclosure) |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Dimensions (H × W × D) | approx. 88 × 70 × 69 mm |
| Weight | approx. 0.44 kg |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It protects three-phase electrical circuits against overloads and short circuits in residential, commercial and industrial installations.
The ABB S203M-C4NA has a 4 A rated current.
This model features a C curve, making it suitable for circuits with moderate inrush currents such as motors and general industrial loads.
The circuit breaker is designed for quick installation onto a standard DIN rail using screw terminal connections.
The ABB S203M-C4NA complies with IEC/EN 60898-1 and IEC/EN 60947-2 for professional circuit protection applications.
ABB System pro M compact miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers for delivering reliable circuit protection, high performance and long-term operational safety.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...