ABB S203M-D0.5NA miniature circuit breaker featuring a 0.5 A rating, 3P+N configuration, D characteristic and 10 kA breaking capacity for industrial and commercial circuit protection.
£273.43
The ABB S203M-D0.5NA is a high performance miniature circuit breaker (MCB) from the trusted ABB System pro M Compact S200M series, engineered to provide dependable overload and short circuit protection for industrial, commercial and specialist electrical installations. Featuring a D characteristic trip curve, it is particularly suitable for circuits with high inrush currents.
The S200M range incorporates both delayed thermal overload protection and fast electromechanical short circuit protection. Its current limiting design helps reduce fault energy, protecting valuable electrical equipment whilst improving overall system reliability.
With a rated current of 0.5 A, a 3P+N configuration and a 10 kA breaking capacity, the S203M-D0.5NA is ideal for protecting low-current three-phase control circuits, automation equipment and specialist machinery requiring neutral switching.
The ABB S203M-D0.5NA automatically disconnects electrical circuits when overloads or short circuits occur. Its thermal tripping mechanism protects against prolonged overload conditions, while the electromechanical trip responds rapidly to fault currents, helping safeguard sensitive electrical equipment.
The D curve characteristic makes this miniature circuit breaker suitable for low-current circuits with higher inrush currents, including control transformers, automation equipment and specialist industrial applications requiring dependable protection.
| Current | 0.5 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200M |
| Model | S203M-D0.5NA |
| Product ID | 2CDS273103R0981 |
| EAN | 4016779663311 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 0.5 A |
| Number of protected poles | 3 |
| Neutral pole | Switched neutral |
| Pole configuration | 3P+N |
| Trip characteristic | D |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Breaking capacity | 10 kA |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Width | 4 modular spacings |
| Built-in depth | 69 mm |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2 |
It provides overload and short circuit protection for low-current three-phase electrical circuits used in industrial and automation applications.
The D curve is intended for circuits with higher inrush currents, such as transformer, motor and inductive load applications.
The ABB S203M-D0.5NA has a rated current of 0.5 A.
It provides three protected phase poles together with a switched neutral pole for three-phase electrical installations.
The device is designed for DIN rail mounting inside electrical control panels and distribution boards.
ABB System pro M Compact miniature circuit breakers are trusted by electrical engineers, panel builders and machine manufacturers for reliable protection across industrial and commercial 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...