ABB S203MT-K6NAH10 miniature circuit breaker with K characteristic, 6 A rated current, 3P+N configuration and 10 kA breaking capacity for industrial and railway applications.
The ABB S203MT-K6NAH10 is a premium three-pole plus neutral (3P+N) miniature circuit breaker (MCB) designed to provide dependable overload and short-circuit protection for industrial, railway and transportation electrical systems. As part of the proven ABB S200MT series, it delivers outstanding performance, durability and safety for demanding low-voltage installations.
Featuring a K tripping characteristic, this MCB is ideal for circuits with moderate inrush currents, including motors, transformers, control equipment and inductive loads. Its carefully engineered tripping characteristics help minimise nuisance trips while maintaining excellent protection for connected equipment.
With a 6 A rated current, 3P+N configuration and a 10 kA breaking capacity, the ABB S203MT-K6NAH10 is well suited to industrial control panels, OEM machinery, electrical distribution boards and railway applications where reliable circuit protection is essential.
The ABB S203MT-K6NAH10 combines thermal overload protection with rapid magnetic short-circuit protection to help safeguard electrical installations against potentially damaging faults. Its K characteristic makes it particularly suitable for equipment that experiences temporary inrush currents during start-up.
Designed for demanding industrial environments, this miniature circuit breaker offers reliable long-term performance and straightforward installation within modular DIN rail distribution systems.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K6NAH10 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 6 A |
| Tripping characteristic | K |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated operational voltage | Up to 440 V AC |
| Rated insulation voltage | 440 V |
| Rated short-circuit breaking capacity | 10 kA |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 70 × 69 mm approx. |
| Weight | approx. 0.39 kg |
It provides overload and short-circuit protection for industrial control circuits, machinery and railway electrical installations.
The K characteristic is designed for circuits with higher inrush currents, making it ideal for motors, transformers and inductive loads.
The ABB S203MT-K6NAH10 has a rated current of 6 A.
This miniature circuit breaker provides a rated short-circuit breaking capacity of 10 kA.
It is designed for DIN rail installation within industrial control panels, distribution boards, OEM machinery and railway electrical systems.
ABB S200MT miniature circuit breakers are trusted by panel builders, OEM manufacturers and industrial engineers for delivering dependable circuit protection, excellent reliability and long operational life in demanding applications.
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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...