ABB S203MT-Z8 miniature circuit breaker, a 3-pole Z curve 8 A MCB from the S200MT range designed for railway, traction and industrial control applications.
£201.28
The ABB S203MT-Z8 is a compact and dependable 3-pole miniature circuit breaker (MCB) designed to provide rapid overload and short-circuit protection for sensitive electrical circuits. As part of the specialist ABB S200MT miniature circuit breaker range, it has been developed specifically for traction, railway and demanding industrial control applications where dependable circuit protection is essential.
The circuit breaker combines thermal overload protection with an electromagnetic short-circuit trip mechanism. Its Z characteristic enables fast tripping at comparatively low fault current levels, making it particularly suitable for sensitive electronic equipment, signalling circuits, PLC inputs and control systems where rapid fault isolation is required.
With a rated current of 8 A, a 3-pole configuration and a rated short-circuit breaking capacity of 10 kA, the S203MT-Z8 provides reliable protection for three-phase auxiliary, control and distribution circuits. Its compact DIN rail design allows simple installation inside electrical panels, rolling stock cabinets and industrial switchboards.
Miniature circuit breakers such as the ABB S203MT-Z8 automatically disconnect electrical circuits during overload or short-circuit conditions, helping protect wiring, control equipment and connected devices from electrical faults and reducing downtime.
The ABB S200MT range has been developed specifically for rolling stock and railway applications while also being suitable for industrial automation systems. Its robust construction, compact footprint and high performance make it an excellent choice for engineers, OEMs and panel builders.
| Current | 8 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z8 |
| Product type | Miniature circuit breaker |
| Number of poles | 3P |
| Rated current | 8 A |
| Tripping characteristic | Z curve |
| Rated voltage | 440 V AC |
| Frequency | 50 / 60 Hz |
| Rated short-circuit breaking capacity | 10 kA |
| Rated impulse withstand voltage | 4 kV |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail mounting |
| Built-in depth | approx. 69 mm |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203MT-Z8 protects sensitive three-phase electrical circuits against overloads and short circuits in railway, traction and industrial control applications.
The S203MT-Z8 has a rated current of 8 A.
This miniature circuit breaker features a 3-pole configuration.
The Z characteristic provides rapid tripping at comparatively low fault current levels, making it suitable for protecting sensitive electronic and control circuits.
The ABB S203MT-Z8 has a rated short-circuit breaking capacity of 10 kA.
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and industrial automation specialists to provide dependable protection for critical electrical installations.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
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...