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ABB S203MT-Z50NA MCB – S200M – 3P+N – Z – 50A
ABB S203MT-Z50NA 3P+N 50 A Z curve miniature circuit breaker with 10 kA breaking capacity for railway, traction, industrial and commercial electrical protection.
Why Choose the ABB S203MT-Z50NA Miniature Circuit Breaker?
The ABB S203MT-Z50NA is a robust 3P+N miniature circuit breaker (MCB) engineered for railway, traction, rolling stock and demanding industrial electrical installations. As part of the specialist ABB S200MT miniature circuit breaker range, it delivers reliable protection against overloads and short circuits in critical low voltage circuits.
Featuring a Z tripping characteristic, the S203MT-Z50NA is designed for sensitive electrical circuits that require rapid magnetic tripping. Its current limiting design reduces fault energy, helping protect cables, control equipment and connected devices while improving overall system safety.
With a rated current of 50 A, a 3P+N configuration and a 10 kA breaking capacity, this ABB miniature circuit breaker is ideal for three-phase systems with neutral switching. The compact DIN rail mounted design enables straightforward installation within electrical distribution boards and industrial control panels.
Key Advantages
- High quality ABB S200MT miniature circuit breaker.
- 50 A rated current for demanding electrical applications.
- Z tripping characteristic for fast protection of sensitive circuits.
- 3P+N configuration with three protected poles and switched neutral.
- 10 kA breaking capacity for dependable fault protection.
- Designed for railway, traction, industrial and commercial installations.
Key Features
- ABB S200MT series.
- 50 A rated current.
- Z tripping characteristic.
- 3 protected poles plus neutral.
- 10 kA rated breaking capacity.
- Current limiting miniature circuit breaker design.
- Thermal overload and magnetic short circuit protection.
- DIN rail mounting compatible with ABB System pro M Compact accessories.
Reliable Circuit Protection for Railway and Industrial Systems
The ABB S203MT-Z50NA combines delayed thermal overload protection with fast electromechanical magnetic short circuit protection. This helps maintain reliable operation while reducing the risk of damage to electrical equipment during fault conditions.
The S200MT range has been developed specifically for railway and traction applications, offering dependable performance, compact installation and full compatibility with ABB System pro M Compact accessories for flexible panel design.
Typical Applications
- Railway and rolling stock electrical systems.
- Traction power and auxiliary circuits.
- Industrial distribution boards.
- Protection of sensitive control circuits.
- Electrical control panels and switchboards.
- Commercial and infrastructure installations.
Technical Specifications
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| Current | 50 A | |
|---|---|---|
| Phase | Three Phase | |
| Poles | 3-pole + N | |
| Device Type | MCB | |
| Trip Curve | Z curve | |
| Breaking Capacity | 10 kA | |
| Manufacturer | ABB | |
| Series | S200MT | |
| Model | S203MT-Z50NA | |
| Product ID | 2CDS273446R0578 | |
| EAN | 4016779128322 | |
| Product type | Miniature circuit breaker (MCB) | |
| Rated current | 50 A | |
| Tripping characteristic | Z | |
| Number of poles | 3P+N | |
| Protected poles | 3 | |
| Breaking capacity | 10 kA | |
| Rated operational voltage | Up to 440 V AC | |
| Frequency | 50 / 60 Hz | |
| Protection rating | IP20 | |
| Mounting type | DIN rail | |
| Standards | IEC/EN 60898-1, IEC/EN 60947-2, UL 1077, CSA 22.2 | |
| HS Code | 85362010 | |
| Country of Manufacture | Germany |
Frequently Asked Questions
What is the ABB S203MT-Z50NA used for?
It protects three-phase electrical circuits with neutral switching against overloads and short circuits in railway, industrial and commercial applications.
What does the Z tripping characteristic mean?
The Z characteristic provides rapid magnetic tripping, making it suitable for protecting sensitive electrical and electronic circuits.
What is the rated current of the ABB S203MT-Z50NA?
The ABB S203MT-Z50NA has a rated current of 50 A.
How many poles does this miniature circuit breaker have?
This model has a 3P+N configuration with three protected poles and a switched neutral.
How is the S203MT-Z50NA installed?
The circuit breaker is designed for installation on a standard DIN rail within electrical control panels and distribution boards.
Trusted by Electrical Professionals Worldwide
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial professionals for dependable circuit protection, compact installation and compliance with recognised international standards.
