ABB S203MT-Z25 3-pole 25 A miniature circuit breaker with Z characteristic tripping curve and 10 kA breaking capacity for railway, traction and industrial circuit protection.
£241.56
The ABB S203MT-Z25 is a dependable 3-pole miniature circuit breaker (MCB) designed for overload and short circuit protection in railway, traction and demanding industrial applications. As part of the specialised ABB S200MT miniature circuit breaker series, it provides compact, high performance circuit protection for installations where reliability and safety are essential.
This circuit breaker combines delayed thermal overload protection with electromechanical short circuit protection. Its Z characteristic tripping curve is designed for sensitive circuits with low inrush current, providing fast fault response where early disconnection is required.
With a 25 A rated current, 3-pole configuration and 10 kA breaking capacity, the ABB S203MT-Z25 is suitable for three-phase electrical systems in railway equipment, control panels and industrial distribution boards. Its DIN rail mounted design enables straightforward installation and compatibility with modular ABB circuit protection systems.
The ABB S200MT range is engineered for railway and traction environments where dependable low voltage protection is critical. These miniature circuit breakers help protect conductors and connected equipment against overload and short circuit conditions whilst supporting compact, modular panel design.
The Z curve characteristic of the S203MT-Z25 provides rapid magnetic tripping at lower fault current levels than many standard curves. This makes it especially suitable for sensitive electronic circuits, control equipment and applications where fast disconnection helps protect downstream devices.
| Current | 25 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z25 |
| Product type | Miniature circuit breaker (MCB) |
| Product ID | 2CDS273445R0518 |
| EAN | 4016779128056 |
| Rated current | 25 A |
| Number of poles | 3 |
| Tripping characteristic | Z |
| Rated short circuit breaking capacity | 10 kA |
| Rated operational voltage | 400 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Current limiting class | Class 3 |
| Typical applications | Railway, rolling stock, traction systems, industrial control panels and sensitive three-phase circuits |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The S203MT-Z25 is used to protect three-phase circuits against overloads and short circuits in railway, traction and industrial applications.
The ABB S203MT-Z25 has a 25 A rated current.
The Z curve provides fast tripping at lower fault current levels, making it suitable for sensitive circuits with low inrush current.
This model has a 3-pole configuration, making it suitable for protecting three-phase electrical circuits.
Yes, the S200MT range is designed for traction and railway applications, including rolling stock electrical systems and transport control panels.
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial electrical professionals for reliable circuit protection, compact installation and long service life in demanding low voltage systems.
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2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...