ABB S203MT-Z1NA miniature circuit breaker, a 1 A 3P+N Z curve MCB from the System pro M Compact S200MT range for traction, railway and specialist industrial circuit protection.
£369.24
The ABB S203MT-Z1NA is a specialist miniature circuit breaker (MCB) from the ABB System pro M Compact S200MT series, developed specifically for traction, railway and demanding industrial electrical applications. Featuring a Z characteristic trip curve, it provides highly sensitive overload and short circuit protection for electronic equipment, signalling systems and precision control circuits requiring rapid fault response.
The S200MT range has been engineered to meet the demanding requirements of railway and rolling stock installations. Combining delayed thermal overload protection with fast electromechanical short circuit protection, it helps safeguard sensitive electrical equipment whilst maintaining dependable operation in harsh transport environments.
With a rated current of 1 A, a 3P+N configuration and a 10 kA breaking capacity, the S203MT-Z1NA is ideally suited to low-current three-phase control circuits requiring neutral switching in traction, railway and specialist industrial systems.
The ABB S203MT-Z1NA automatically disconnects electrical circuits during overloads and short circuits. Its thermal tripping mechanism protects against sustained overload conditions, whilst the electromechanical mechanism reacts rapidly to fault currents, helping minimise equipment damage and maximise system availability.
The Z characteristic is intended for highly sensitive circuits where rapid magnetic tripping is required, making it particularly suitable for electronic equipment, instrumentation, signalling systems and precision railway control applications.
| Current | 1 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | System pro M Compact S200MT |
| Model | S203MT-Z1NA |
| Product ID | 2CDS273446R0218 |
| EAN | 4016779128148 |
| Product type | Miniature circuit breaker (MCB) |
| Rated current | 1 A |
| Number of protected poles | 3 |
| Neutral pole | Switched neutral |
| Pole configuration | 3P+N |
| Trip characteristic | Z |
| 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 |
| Built-in depth | 69 mm |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
It provides overload and short circuit protection for sensitive three-phase electrical circuits used in railway, traction and industrial control systems.
The Z curve provides rapid magnetic tripping at low multiples of the rated current, making it ideal for protecting sensitive electronic equipment.
The ABB S203MT-Z1NA has a rated current of 1 A.
It provides three protected phase poles together with a switched neutral pole for three-phase installations.
Yes. The ABB S200MT range is specifically designed for traction and railway applications, including rolling stock and transport infrastructure.
ABB System pro M Compact S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial professionals for dependable circuit protection in demanding transport and electrical 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...