ABB S203MT-K8NAH10 miniature circuit breaker with K characteristic, 8 A rated current, 3P+N configuration and 10 kA breaking capacity for industrial and railway applications.
The ABB S203MT-K8NAH10 is a premium three-pole plus neutral (3P+N) miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection for industrial, railway and transportation electrical systems. As part of the proven ABB S200MT series, it delivers dependable performance for demanding low-voltage applications.
Featuring a K tripping characteristic, this miniature circuit breaker is ideal for circuits with higher inrush currents, including motors, transformers, solenoids and inductive loads. Its optimised tripping behaviour helps minimise nuisance tripping while maintaining excellent protection for connected equipment.
With a rated current of 8 A, 3P+N configuration and a 10 kA breaking capacity, the ABB S203MT-K8NAH10 is an excellent choice for DIN rail mounted control panels, OEM machinery, industrial automation systems and railway electrical installations.
The ABB S203MT-K8NAH10 combines thermal overload protection with rapid magnetic short-circuit protection to safeguard electrical installations against damaging fault conditions. Its K characteristic makes it particularly suitable for circuits that experience temporary inrush currents during normal operation.
Its compact modular construction enables straightforward installation within distribution boards and control panels, making it suitable for industrial automation, railway systems and OEM machinery requiring dependable circuit protection.
| Current | 8 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-K8NAH10 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 8 A |
| Tripping characteristic | K |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated short-circuit breaking capacity | 10 kA |
| Frequency | 50 / 60 Hz |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
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 suitable for motors, transformers and other inductive loads.
The ABB S203MT-K8NAH10 has a rated current of 8 A.
This miniature circuit breaker offers a rated short-circuit breaking capacity of 10 kA.
It is designed for DIN rail installation inside 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 reliable circuit protection, excellent durability and dependable long-term performance.
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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...