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ABB S203MT-Z0.5NA MCB – 3P+N – Z Curve – 0.5A – 10kA
ABB S203MT-Z0.5NA miniature circuit breaker, a 0.5 A 3P+N Z curve MCB from the System pro M Compact S200MT range for traction, railway and specialist industrial circuit protection.
Why Choose the ABB S203MT-Z0.5NA Miniature Circuit Breaker?
The ABB S203MT-Z0.5NA 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 and 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 while maintaining dependable operation in harsh transport environments.
With a rated current of 0.5 A, a 3P+N configuration and a 10 kA breaking capacity, the S203MT-Z0.5NA is ideally suited to low-current three-phase control circuits requiring neutral switching in traction, railway and specialist industrial systems.
Key Advantages
- Specialist miniature circuit breaker designed for traction and railway applications.
- 0.5 A rated current for precision low-current protection.
- Z characteristic trip curve for highly sensitive electronic circuits.
- 3P+N configuration with three protected poles and switched neutral.
- 10 kA breaking capacity for dependable short circuit protection.
- DIN rail mounting for fast installation within electrical panels.
Key Features
- ABB System pro M Compact S200MT series.
- 0.5 A rated current.
- Z curve tripping characteristic.
- 3P+N pole configuration.
- 10 kA rated short circuit breaking capacity.
- Designed specifically for traction and railway environments.
- Thermal overload and electromechanical short circuit protection.
- Compatible with ABB System pro M Compact accessories.
Reliable Circuit Protection for Sensitive Railway Control Systems
The ABB S203MT-Z0.5NA 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.
Typical Applications
- Railway and traction electrical systems.
- Rolling stock control panels.
- Electronic control circuits.
- Instrumentation and signalling equipment.
- Industrial automation systems.
- Electrical installations requiring neutral switching.
Technical Specifications
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| Current | 0.5 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | System pro M Compact S200MT | |
| Model | S203MT-Z0.5NA | |
| Product ID | 2CDS273446R0158 | |
| EAN | 4016779128131 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 0.5 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, IEC 61373, EN 45545, NF F 16-101/102 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-Z0.5NA used for?
It provides overload and short circuit protection for sensitive three-phase electrical circuits used in railway, traction and industrial control systems.
What does the Z trip characteristic mean?
The Z curve provides rapid magnetic tripping at low multiples of the rated current, making it ideal for protecting sensitive electronic equipment.
What is the rated current of this MCB?
The ABB S203MT-Z0.5NA has a rated current of 0.5 A.
What does 3P+N mean?
It provides three protected phase poles together with a switched neutral pole for three-phase installations.
Is this miniature circuit breaker designed for railway applications?
Yes. The ABB S200MT range is specifically designed for traction and railway applications, including rolling stock and transport infrastructure.
Trusted by Rail and Electrical Professionals Worldwide
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.
