ABB S203MT-Z6 miniature circuit breaker, a 3-pole 6 A Z curve MCB from the S200MT range with 10 kA breaking capacity for traction, railway and industrial circuit protection.
£201.28
The ABB S203MT-Z6 is a specialist 3-pole miniature circuit breaker (MCB) designed to provide reliable overload and short-circuit protection in demanding electrical installations. Part of the ABB S200MT range, it is developed for traction, railway and industrial applications where robust modular circuit protection is required.
With a Z tripping characteristic, the S203MT-Z6 is designed for circuits requiring fast magnetic tripping at lower fault current levels. This makes it suitable for selected sensitive loads, control circuits and specialist electrical systems where rapid disconnection is important.
Rated at 6 A with a 3-pole configuration and 10 kA short-circuit breaking capacity, the ABB S203MT-Z6 provides dependable three-phase circuit protection in a compact DIN rail format. Its current-limiting design helps reduce fault energy and supports safe operation in demanding transport and industrial environments.
Miniature circuit breakers such as the ABB S203MT-Z6 automatically disconnect electrical circuits when excessive current is detected. The thermal tripping mechanism provides overload protection, while the electromechanical tripping mechanism reacts quickly to short-circuit faults.
The Z curve characteristic provides rapid magnetic tripping at lower fault current levels, making the S203MT-Z6 suitable for selected sensitive circuits and specialist control applications. Its S200MT construction supports reliable performance in traction, railway and industrial environments.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z6 |
| Product ID | 2CDS273006R0378 |
| Product type | Miniature circuit breaker |
| Number of poles | 3P |
| Protected poles | 3 |
| Rated current | 6 A |
| Tripping characteristic | Z curve |
| Rated short-circuit capacity | 10 kA |
| Rated operational voltage | 400 V AC |
| Maximum operational voltage | 440 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Frequency | 50 / 60 Hz |
| Protection rating | IP20 |
| Pollution degree | 3 |
| Overvoltage category | III |
| Mounting type | DIN rail |
| Width | 3 modules |
| Dimensions (H × W × D) | approx. 88 × 52.5 × 69 mm |
| HS Code | 85362010 |
| Country of Manufacture | Germany |
The ABB S203MT-Z6 is used to protect three-phase electrical circuits against overloads and short circuits in traction, railway, industrial and control panel applications.
The S203MT-Z6 has a rated current of 6 A.
This miniature circuit breaker has a 3-pole configuration with three protected poles.
The Z curve tripping characteristic provides fast tripping at lower fault current levels, making it suitable for selected sensitive circuits and control applications.
It is typically installed on a DIN rail inside distribution boards, control panels, switchboards or industrial electrical enclosures.
ABB S200MT miniature circuit breakers are trusted by railway engineers, panel builders and electrical contractors for reliable modular circuit protection in demanding industrial and transport applications.
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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...