ABB S203MT-Z6NAH10 miniature circuit breaker with Z characteristic, 6 A rated current, 3P+N configuration and 10 kA breaking capacity for industrial, railway and sensitive circuit protection.
The ABB S203MT-Z6NAH10 is a high-performance three-pole plus neutral (3P+N) miniature circuit breaker (MCB) designed for reliable protection of sensitive electrical circuits in industrial, railway and transportation applications. As part of the specialist ABB S200MT series, it provides dependable overload and short-circuit protection in demanding low-voltage installations.
Featuring a Z tripping characteristic, the S203MT-Z6NAH10 is suitable for circuits requiring fast magnetic tripping at low fault currents. This makes it ideal for protecting sensitive electronic equipment, control systems, PLC circuits and other electrical loads where rapid disconnection is essential.
With a 6 A rated current, 3P+N configuration and 10 kA breaking capacity, this ABB miniature circuit breaker is well suited to DIN rail mounted control panels, OEM machinery, railway systems and compact distribution boards.
The ABB S203MT-Z6NAH10 protects electrical installations by combining delayed thermal overload protection with electromechanical short-circuit protection. Its Z characteristic enables rapid tripping at relatively low fault currents, helping reduce the risk of damage to sensitive electronic components.
Designed for demanding installations, the S200MT range is suitable for transportation, industrial automation and specialist control systems where reliability, compact design and safe circuit isolation are essential.
| Current | 3 A |
|---|---|
| Phase | Three Phase |
| Manufacturer | ABB |
| Series | S200MT |
| Model | S203MT-Z6NAH10 |
| Product type | Miniature Circuit Breaker (MCB) |
| Rated current | 6 A |
| Tripping characteristic | Z |
| Number of poles | 3P+N |
| Protected poles | 3 |
| Rated operational voltage | 440 V AC |
| Rated insulation voltage | 440 V |
| Rated impulse withstand voltage | 4 kV |
| Rated short-circuit breaking capacity | 10 kA |
| Frequency | 50 / 60 Hz |
| Current limiting class | 3 |
| Protection rating | IP20 |
| Mounting type | DIN rail |
| Dimensions (H × W × D) | 88 × 70 × 69 mm approx. |
It is used to protect sensitive electrical circuits against overloads and short circuits in industrial, railway and automation applications.
The Z characteristic provides fast magnetic tripping at low fault currents, making it suitable for protecting sensitive electronic equipment and control circuits.
The ABB S203MT-Z6NAH10 has a rated current of 6 A.
This miniature circuit breaker has a rated short-circuit breaking capacity of 10 kA.
It is designed for DIN rail mounting inside electrical distribution boards, control cabinets, railway systems and industrial panel assemblies.
ABB S200MT miniature circuit breakers are trusted by panel builders, railway engineers and automation specialists for dependable protection, compact installation and long service life in demanding low-voltage systems.
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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...