Why Choose the ABB S203MT-Z40NA Miniature Circuit Breaker?
The ABB S203MT-Z40NA is a reliable 3P+N miniature circuit breaker (MCB) designed for railway, traction, rolling stock and demanding industrial electrical installations. Part of the specialist ABB S200MT miniature circuit breaker range, it provides dependable protection against overloads and short circuits in critical low voltage circuits.
Featuring a Z tripping characteristic, the S203MT-Z40NA is suitable for sensitive circuits requiring fast magnetic tripping response. Its current limiting design helps reduce fault energy, protecting cables, components and connected equipment during short circuit conditions.
With a rated current of 40 A, a 3P+N configuration and a 10 kA breaking capacity, this ABB MCB is ideal for three-phase systems with neutral switching. It is DIN rail mounted and compatible with ABB System pro M Compact accessories for flexible installation in control panels and distribution boards.
Key Advantages
- High quality ABB S200MT miniature circuit breaker.
- 40 A rated current for three-phase electrical protection.
- Z characteristic for sensitive circuits requiring rapid tripping.
- 3P+N configuration with three protected poles and switched neutral.
- 10 kA breaking capacity for robust fault protection.
- Designed for railway, traction, industrial and commercial installations.
Key Features
- ABB S200MT series.
- 40 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 for control panels and distribution boards.
Reliable Circuit Protection for Railway and Industrial Systems
The ABB S203MT-Z40NA uses both delayed thermal tripping for overload protection and electromechanical magnetic tripping for short circuit protection. This combination helps maintain circuit reliability while reducing the risk of damage during fault conditions.
The S200MT range is designed especially for traction and railway applications, with robust construction and compatibility with ABB System pro M Compact accessories. This makes the S203MT-Z40NA suitable for use in control cabinets, rolling stock panels, distribution systems and industrial automation equipment.
Typical Applications
- Railway and rolling stock electrical systems.
- Traction power and auxiliary circuits.
- Industrial distribution boards.
- Control panels and switchboards.
- Protection of sensitive electrical circuits.
- Commercial and infrastructure electrical installations.
