ABB S203M-C20NA miniature circuit breaker from the System pro M compact S200M range featuring a 20 A rating, C curve tripping characteristic, 3+NP configuration and 10 kA breaking capacity for reliable circuit protection.
£167.81
The ABB S203M-C20NA is a premium miniature circuit breaker (MCB) engineered to provide dependable overload and short-circuit protection for commercial, industrial and high-performance electrical installations. As part of the proven ABB System pro M compact S200M series, it delivers excellent reliability, high breaking capacity and long service life for demanding applications.
Featuring a C curve tripping characteristic, the S203M-C20NA is designed for general-purpose circuits with moderate inrush currents, making it ideal for lighting, socket outlets, distribution circuits and a wide range of industrial control equipment. Its current-limiting technology helps minimise fault energy, protecting connected equipment and reducing system downtime.
With a rated current of 20 A, a 3+NP pole configuration and a breaking capacity of up to 10 kA, the S203M-C20NA provides reliable protection for three-phase systems requiring a switched neutral. The compact DIN rail design allows quick installation within switchboards, panel boards and distribution cabinets.
Miniature circuit breakers such as the ABB S203M-C20NA automatically disconnect electrical circuits during overload or short-circuit conditions, helping to protect cables, equipment and connected devices from damage while improving electrical safety.
The ABB S200M range combines high breaking capacity with compact dimensions, making it suitable for use in commercial buildings, industrial facilities, machine control panels and OEM electrical equipment where dependable circuit protection is essential.
| Current | 20 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M compact S200M |
| Model | S203M-C20NA |
| Product type | Miniature circuit breaker |
| Product ID | 2CDS273103R0204 |
| EAN | 4016779550611 |
| Rated current | 20 A |
| Tripping characteristic | C curve |
| Pole configuration | 3+NP |
| Rated operational voltage | 230 / 400 V AC |
| Frequency | 50 / 60 Hz |
| Rated breaking capacity | 10 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Dimensions (H × W × D) | 88 × 70 × 69 mm |
| Weight | approx. 0.50 kg |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S203M-C20NA protects three-phase electrical circuits against overloads and short circuits in commercial and industrial installations.
This miniature circuit breaker has a 20 A rated current.
A C curve MCB is suitable for circuits with moderate inrush currents, including lighting, socket outlets and general-purpose industrial loads.
The device provides three protected phase poles together with a switched neutral pole for three-phase electrical systems.
It is designed for DIN rail installation inside switchboards, distribution boards and electrical control panels.
ABB System pro M compact miniature circuit breakers are trusted by electricians, panel builders and industrial engineers for dependable protection, excellent build quality and long-term reliability in demanding electrical installations.
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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...