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.
