ABB S203-K3NA System pro M Compact miniature circuit breaker with 3P+N configuration, 3 A rated current, K tripping characteristic and 6 kA breaking capacity for industrial circuit protection.
£200.74
The ABB S203-K3NA is a premium 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 for industrial, commercial and OEM electrical installations. Featuring a K tripping characteristic, this breaker is specifically engineered for circuits with elevated inrush currents, making it ideal for protecting motors, transformers, solenoids and other inductive equipment.
Manufactured using ABB's advanced thermal and electromagnetic trip technology, the S203-K3NA delivers reliable circuit protection with excellent current limiting performance. Its compact DIN rail mounted design allows quick installation within switchboards, distribution boards and industrial control panels while remaining fully compatible with ABB's range of S200 accessories.
With a 3 A rated current, 3P+N configuration and a 6 kA breaking capacity, the ABB S203-K3NA provides dependable protection for three-phase electrical systems requiring a switched neutral, ensuring reliable operation in demanding industrial environments.
The ABB S203-K3NA automatically disconnects electrical circuits during overload and short circuit conditions, helping protect wiring, machinery and connected equipment from damage while maintaining electrical safety and system reliability.
Its K characteristic magnetic trip curve is designed for circuits with elevated starting currents, making it particularly suitable for motors, transformers, magnetic coils and other inductive equipment where higher magnetic trip thresholds are required.
| Current | 3 A |
|---|---|
| Phase | Single Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200 |
| Model | S203-K3NA |
| Product ID | 2CDS253103R0317 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 3 A |
| Tripping characteristic | K |
| 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. 0.45 kg |
| Protection rating | IP20 (IP40 when installed in a suitable enclosure) |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203-K3NA protects three-phase electrical circuits with a neutral against overloads and short circuits in industrial and commercial installations.
The K characteristic is designed for circuits with higher inrush currents, making it suitable for motors, transformers and other inductive loads.
This miniature circuit breaker has a 3 A rated current.
The breaker mounts directly onto a standard 35 mm DIN rail inside switchboards, distribution boards and industrial control panels.
Yes. The ABB S200 range supports auxiliary contacts, shunt trips, undervoltage releases, motor operators and other compatible accessories.
ABB System pro M Compact miniature circuit breakers are trusted by electrical contractors, panel builders and industrial engineers worldwide for dependable circuit protection, high performance and long service life.
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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...