Why Choose the ABB S203MT-Z20H01 Miniature Circuit Breaker?
The ABB S203MT-Z20H01 is a specialist miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection for traction, railway and demanding industrial electrical installations. As part of the ABB System pro M Compact S200MT series, it delivers dependable protection, high breaking capacity and long service life in applications where operational reliability is critical.
Featuring a 20 A rated current and a Z tripping characteristic, the S203MT-Z20H01 is ideal for protecting sensitive circuits that require rapid magnetic tripping. Its 3-pole configuration makes it suitable for three-phase systems used throughout railway vehicles, industrial control equipment and specialist machinery.
Designed for DIN rail mounting, the ABB S203MT-Z20H01 combines compact dimensions with a robust construction, making it easy to install inside distribution boards, control panels and railway electrical cabinets while delivering dependable protection against overloads and short circuits.
Key Advantages
- Reliable miniature circuit breaker for traction and railway applications.
- 20 A rated current for three-phase electrical circuits.
- Z characteristic provides rapid protection for sensitive equipment.
- 3-pole configuration for coordinated three-phase protection.
- 10 kA short-circuit breaking capacity.
- Compact DIN rail mounted design for professional installations.
Key Features
- ABB S200MT miniature circuit breaker series.
- 20 A rated current.
- Z tripping characteristic.
- 3-pole configuration.
- 10 kA rated short-circuit capacity.
- Thermal magnetic trip mechanism.
- Failsafe bi-directional cylinder-lift screw terminals.
- Compatible with ABB System pro M Compact accessories.
Reliable Protection for Sensitive Three-Phase Circuits
Miniature circuit breakers such as the ABB S203MT-Z20H01 automatically disconnect electrical circuits during overload or short-circuit conditions. This helps protect wiring, connected equipment and control systems while improving operational safety.
The Z characteristic provides rapid magnetic tripping at relatively low fault currents, making this breaker particularly suitable for protecting sensitive electronic equipment, signalling systems and specialist railway applications where fast fault clearance is essential.
Typical Applications
- Railway and rolling stock electrical systems.
- Industrial control panels.
- Sensitive electronic equipment.
- Automation and signalling systems.
- Three-phase machinery.
- Commercial and industrial distribution boards.
