ABB S203MT-Z3NAH10 miniature circuit breaker with Z characteristic, 3A rated current, 3P+N configuration and 10 kA breaking capacity for industrial and railway applications.
The ABB S203MT-Z3NAH10 is a high-performance three-pole plus neutral (3P+N) miniature circuit breaker (MCB) engineered for demanding industrial and railway applications requiring precise protection of sensitive electrical circuits. Part of the proven ABB S200MT series, this circuit breaker delivers dependable overload and short-circuit protection while meeting stringent performance requirements.
Designed with a Z characteristic tripping curve, the S203MT-Z3NAH10 provides rapid disconnection for low fault currents, making it particularly suitable for protecting sensitive electronic equipment, signalling systems and specialised control circuits. Its compact modular construction simplifies installation whilst ensuring long-term reliability in challenging environments.
Featuring a 3 A rated current, 10 kA breaking capacity and integrated switched neutral, the ABB S203MT-Z3NAH10 is ideal for industrial automation, transportation systems, electrical control panels and OEM equipment where dependable circuit protection is essential.
The ABB S203MT-Z3NAH10 protects electrical installations against overloads and short circuits whilst maintaining reliable operation of sensitive electronic equipment. Its Z characteristic provides rapid magnetic tripping at relatively low fault currents, helping safeguard delicate devices from damage.
Developed for industrial automation, transportation and railway applications, the S200MT range combines dependable performance with high mechanical endurance, making it suitable for demanding environments where system availability is critical.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z3NAH10 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 3 A |
| Tripping characteristic | Z |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated short-circuit breaking capacity | 10 kA |
| Frequency | 50 / 60 Hz |
| Mounting type | DIN rail |
| Terminal type | Screw terminals |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL1077 |
It provides overload and short-circuit protection for sensitive electrical circuits used in industrial, automation and railway applications.
The Z characteristic provides very fast magnetic tripping at low fault currents, making it suitable for protecting sensitive electronic equipment.
The S203MT-Z3NAH10 features three protected poles with a switched neutral (3P+N).
This miniature circuit breaker offers a 10 kA rated short-circuit breaking capacity.
It is designed for installation on standard DIN rails within industrial control panels, distribution boards and railway electrical systems.
ABB S200MT miniature circuit breakers are trusted by engineers, panel builders and OEM manufacturers for delivering dependable circuit protection, high reliability and long service life in demanding industrial and transportation 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...